12月, 2014 | ネクストベータ代表Blog

「月別アーカイブ：2014年12月」一覧

WordPressを読む　72 /blog/wp-includes/vars.php

2014/12/04 Wordpress

<?php
/**
 * Creates common globals for the rest of WordPress
 *
 * Sets $pagenow global which is the current page. Checks
 * for the browser to set which one is currently being used.
 *
 * Detects which user environment WordPress is being used on.
 * Only attempts to check for Apache, Nginx and IIS -- three web
 * servers with known pretty permalink capability.
 *
 * Note: Though Nginx is detected, WordPress does not currently
 * generate rewrite rules for it. See http://codex.wordpress.org/Nginx
 *
 * @package WordPress
 */

global $pagenow,
	$is_lynx, $is_gecko, $is_winIE, $is_macIE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone, $is_IE,
	$is_apache, $is_IIS, $is_iis7, $is_nginx;

// On which page are we ?
if ( is_admin() ) {
	// wp-admin pages are checked more carefully
	if ( is_network_admin() )
		preg_match('#/wp-admin/network/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches);
	elseif ( is_user_admin() )
		preg_match('#/wp-admin/user/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches);
	else
		preg_match('#/wp-admin/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches);
	$pagenow = $self_matches[1];
	$pagenow = trim($pagenow, '/');
	$pagenow = preg_replace('#\?.*?$#', '', $pagenow);
	if ( '' === $pagenow || 'index' === $pagenow || 'index.php' === $pagenow ) {
		$pagenow = 'index.php';
	} else {
		preg_match('#(.*?)(/|$)#', $pagenow, $self_matches);
		$pagenow = strtolower($self_matches[1]);
		if ( '.php' !== substr($pagenow, -4, 4) )
			$pagenow .= '.php'; // for Options +Multiviews: /wp-admin/themes/index.php (themes.php is queried)
	}
} else {
	if ( preg_match('#([^/]+\.php)([?/].*?)?$#i', $_SERVER['PHP_SELF'], $self_matches) )
		$pagenow = strtolower($self_matches[1]);
	else
		$pagenow = 'index.php';
}
unset($self_matches);

// Simple browser detection
$is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;

if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
	if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {
		$is_lynx = true;
	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {
		if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) {
			$is_admin = is_admin();
			/**
			 * Filter whether Google Chrome Frame should be used, if available.
			 *
			 * @since 3.2.0
			 *
			 * @param bool $is_admin Whether to use the Google Chrome Frame. Default is the value of is_admin().
			 */
			if ( $is_chrome = apply_filters( 'use_google_chrome_frame', $is_admin ) )
				header( 'X-UA-Compatible: chrome=1' );
			$is_winIE = ! $is_chrome;
		} else {
			$is_chrome = true;
		}
	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) {
		$is_safari = true;
	} elseif ( ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false || strpos($_SERVER['HTTP_USER_AGENT'], 'Trident') !== false ) && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) {
		$is_winIE = true;
	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) {
		$is_macIE = true;
	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) {
		$is_gecko = true;
	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) {
		$is_opera = true;
	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) {
		$is_NS4 = true;
	}
}

if ( $is_safari && stripos($_SERVER['HTTP_USER_AGENT'], 'mobile') !== false )
	$is_iphone = true;

$is_IE = ( $is_macIE || $is_winIE );

// Server detection

/**
 * Whether the server software is Apache or something else
 * @global bool $is_apache
 */
$is_apache = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false);

/**
 * Whether the server software is Nginx or something else
 * @global bool $is_nginx
 */
$is_nginx = (strpos($_SERVER['SERVER_SOFTWARE'], 'nginx') !== false);

/**
 * Whether the server software is IIS or something else
 * @global bool $is_IIS
 */
$is_IIS = !$is_apache && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false);

/**
 * Whether the server software is IIS 7.X or greater
 * @global bool $is_iis7
 */
$is_iis7 = $is_IIS && intval( substr( $_SERVER['SERVER_SOFTWARE'], strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/' ) + 14 ) ) >= 7;

/**
 * Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
 *
 * @return bool true|false
 */
function wp_is_mobile() {
	static $is_mobile;

	if ( isset($is_mobile) )
		return $is_mobile;

	if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
		$is_mobile = false;
	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false
		|| strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false ) {
			$is_mobile = true;
	} else {
		$is_mobile = false;
	}

	return $is_mobile;
}

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<?php

/**

* Creates common globals for the rest of WordPress

* Sets $pagenow global which is the current page. Checks

* for the browser to set which one is currently being used.

* Detects which user environment WordPress is being used on.

* Only attempts to check for Apache, Nginx and IIS -- three web

* servers with known pretty permalink capability.

* Note: Though Nginx is detected, WordPress does not currently

* generate rewrite rules for it. See http://codex.wordpress.org/Nginx

* @package WordPress

global $pagenow,

$is_lynx, $is_gecko, $is_winIE, $is_macIE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone, $is_IE,

$is_apache, $is_IIS, $is_iis7, $is_nginx;

// On which page are we ?

if ( is_admin() ) {

// wp-admin pages are checked more carefully

if ( is_network_admin() )

preg_match('#/wp-admin/network/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches);

elseif ( is_user_admin() )

preg_match('#/wp-admin/user/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches);

else

preg_match('#/wp-admin/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches);

$pagenow = $self_matches[1];

$pagenow = trim($pagenow, '/');

$pagenow = preg_replace('#\?.*?$#', '', $pagenow);

if ( '' === $pagenow || 'index' === $pagenow || 'index.php' === $pagenow ) {

$pagenow = 'index.php';

} else {

preg_match('#(.*?)(/|$)#', $pagenow, $self_matches);

$pagenow = strtolower($self_matches[1]);

if ( '.php' !== substr($pagenow, -4, 4) )

$pagenow .= '.php'; // for Options +Multiviews: /wp-admin/themes/index.php (themes.php is queried)

}

} else {

if ( preg_match('#([^/]+\.php)([?/].*?)?$#i', $_SERVER['PHP_SELF'], $self_matches) )

$pagenow = strtolower($self_matches[1]);

else

$pagenow = 'index.php';

}

unset($self_matches);

// Simple browser detection

$is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;

if ( isset($_SERVER['HTTP_USER_AGENT']) ) {

if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {

$is_lynx = true;

} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {

if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) {

$is_admin = is_admin();

/**

* Filter whether Google Chrome Frame should be used, if available.

* @since 3.2.0

* @param bool $is_admin Whether to use the Google Chrome Frame. Default is the value of is_admin().

if ( $is_chrome = apply_filters( 'use_google_chrome_frame', $is_admin ) )

header( 'X-UA-Compatible: chrome=1' );

$is_winIE = ! $is_chrome;

} else {

$is_chrome = true;

}

} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) {

$is_safari = true;

} elseif ( ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false || strpos($_SERVER['HTTP_USER_AGENT'], 'Trident') !== false ) && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) {

$is_winIE = true;

} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) {

$is_macIE = true;

} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) {

$is_gecko = true;

} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) {

$is_opera = true;

} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) {

$is_NS4 = true;

}

if ( $is_safari && stripos($_SERVER['HTTP_USER_AGENT'], 'mobile') !== false )

$is_iphone = true;

$is_IE = ( $is_macIE || $is_winIE );

// Server detection

/**

* Whether the server software is Apache or something else

* @global bool $is_apache

$is_apache = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false);

/**

* Whether the server software is Nginx or something else

* @global bool $is_nginx

$is_nginx = (strpos($_SERVER['SERVER_SOFTWARE'], 'nginx') !== false);

/**

* Whether the server software is IIS or something else

* @global bool $is_IIS

$is_IIS = !$is_apache && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false);

/**

* Whether the server software is IIS 7.X or greater

* @global bool $is_iis7

$is_iis7 = $is_IIS && intval( substr( $_SERVER['SERVER_SOFTWARE'], strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/' ) + 14 ) ) >= 7;

/**

* Test if the current browser runs on a mobile device (smart phone, tablet, etc.)

* @return bool true|false

function wp_is_mobile() {

static $is_mobile;

if ( isset($is_mobile) )

return $is_mobile;

if ( empty($_SERVER['HTTP_USER_AGENT']) ) {

$is_mobile = false;

} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)

|| strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false

|| strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false

|| strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false

|| strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false

|| strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false

|| strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false ) {

$is_mobile = true;

} else {

$is_mobile = false;

}

return $is_mobile;

}

WordPressを読む　71 /blog/wp-includes/admin-bar.php

2014/12/04 Wordpress

<?php
/**
 * Admin Bar
 *
 * This code handles the building and rendering of the press bar.
 */

/**
 * Instantiate the admin bar object and set it up as a global for access elsewhere.
 *
 * UNHOOKING THIS FUNCTION WILL NOT PROPERLY REMOVE THE ADMIN BAR.
 * For that, use show_admin_bar(false) or the 'show_admin_bar' filter.
 *
 * @since 3.1.0
 * @access private
 * @return bool Whether the admin bar was successfully initialized.
 */
function _wp_admin_bar_init() {
	global $wp_admin_bar;

	if ( ! is_admin_bar_showing() )
		return false;

	/* Load the admin bar class code ready for instantiation */
	require( ABSPATH . WPINC . '/class-wp-admin-bar.php' );

	/* Instantiate the admin bar */

	/**
	 * Filter the admin bar class to instantiate.
	 *
	 * @since 3.1.0
	 *
	 * @param string $wp_admin_bar_class Admin bar class to use. Default 'WP_Admin_Bar'.
	 */
	$admin_bar_class = apply_filters( 'wp_admin_bar_class', 'WP_Admin_Bar' );
	if ( class_exists( $admin_bar_class ) )
		$wp_admin_bar = new $admin_bar_class;
	else
		return false;

	$wp_admin_bar->initialize();
	$wp_admin_bar->add_menus();

	return true;
}
// Don't remove. Wrong way to disable.
add_action( 'template_redirect', '_wp_admin_bar_init', 0 );
add_action( 'admin_init', '_wp_admin_bar_init' );

/**
 * Render the admin bar to the page based on the $wp_admin_bar->menu member var.
 * This is called very late on the footer actions so that it will render after anything else being
 * added to the footer.
 *
 * It includes the action "admin_bar_menu" which should be used to hook in and
 * add new menus to the admin bar. That way you can be sure that you are adding at most optimal point,
 * right before the admin bar is rendered. This also gives you access to the $post global, among others.
 *
 * @since 3.1.0
 */
function wp_admin_bar_render() {
	global $wp_admin_bar;

	if ( ! is_admin_bar_showing() || ! is_object( $wp_admin_bar ) )
		return false;

	/**
	 * Load all necessary admin bar items.
	 *
	 * This is the hook used to add, remove, or manipulate admin bar items.
	 *
	 * @since 3.1.0
	 *
	 * @param WP_Admin_Bar $wp_admin_bar WP_Admin_Bar instance, passed by reference
	 */
	do_action_ref_array( 'admin_bar_menu', array( &$wp_admin_bar ) );

	/**
	 * Fires before the admin bar is rendered.
	 *
	 * @since 3.1.0
	 */
	do_action( 'wp_before_admin_bar_render' );

	$wp_admin_bar->render();

	/**
	 * Fires after the admin bar is rendered.
	 *
	 * @since 3.1.0
	 */
	do_action( 'wp_after_admin_bar_render' );
}
add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );

/**
 * Add the WordPress logo menu.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_wp_menu( $wp_admin_bar ) {
	$wp_admin_bar->add_menu( array(
		'id'    => 'wp-logo',
		'title' => '<span class="ab-icon"></span>',
		'href'  => self_admin_url( 'about.php' ),
		'meta'  => array(
			'title' => __('About WordPress'),
		),
	) );

	if ( is_user_logged_in() ) {
		// Add "About WordPress" link
		$wp_admin_bar->add_menu( array(
			'parent' => 'wp-logo',
			'id'     => 'about',
			'title'  => __('About WordPress'),
			'href'  => self_admin_url( 'about.php' ),
		) );
	}

	// Add WordPress.org link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'wporg',
		'title'     => __('WordPress.org'),
		'href'      => __('https://wordpress.org/'),
	) );

	// Add codex link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'documentation',
		'title'     => __('Documentation'),
		'href'      => __('http://codex.wordpress.org/'),
	) );

	// Add forums link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'support-forums',
		'title'     => __('Support Forums'),
		'href'      => __('https://wordpress.org/support/'),
	) );

	// Add feedback link
	$wp_admin_bar->add_menu( array(
		'parent'    => 'wp-logo-external',
		'id'        => 'feedback',
		'title'     => __('Feedback'),
		'href'      => __('https://wordpress.org/support/forum/requests-and-feedback'),
	) );
}

/**
 * Add the sidebar toggle button.
 *
 * @since 3.8.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_sidebar_toggle( $wp_admin_bar ) {
	if ( is_admin() ) {
		$wp_admin_bar->add_menu( array(
			'id'    => 'menu-toggle',
			'title' => '<span class="ab-icon"></span><span class="screen-reader-text">' . __( 'Menu' ) . '</span>',
			'href'  => '#',
		) );
	}
}

/**
 * Add the "My Account" item.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_my_account_item( $wp_admin_bar ) {
	$user_id      = get_current_user_id();
	$current_user = wp_get_current_user();
	$profile_url  = get_edit_profile_url( $user_id );

	if ( ! $user_id )
		return;

	$avatar = get_avatar( $user_id, 26 );
	$howdy  = sprintf( __('Howdy, %1$s'), $current_user->display_name );
	$class  = empty( $avatar ) ? '' : 'with-avatar';

	$wp_admin_bar->add_menu( array(
		'id'        => 'my-account',
		'parent'    => 'top-secondary',
		'title'     => $howdy . $avatar,
		'href'      => $profile_url,
		'meta'      => array(
			'class'     => $class,
			'title'     => __('My Account'),
		),
	) );
}

/**
 * Add the "My Account" submenu items.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_my_account_menu( $wp_admin_bar ) {
	$user_id      = get_current_user_id();
	$current_user = wp_get_current_user();
	$profile_url  = get_edit_profile_url( $user_id );

	if ( ! $user_id )
		return;

	$wp_admin_bar->add_group( array(
		'parent' => 'my-account',
		'id'     => 'user-actions',
	) );

	$user_info  = get_avatar( $user_id, 64 );
	$user_info .= "<span class='display-name'>{$current_user->display_name}</span>";

	if ( $current_user->display_name !== $current_user->user_login )
		$user_info .= "<span class='username'>{$current_user->user_login}</span>";

	$wp_admin_bar->add_menu( array(
		'parent' => 'user-actions',
		'id'     => 'user-info',
		'title'  => $user_info,
		'href'   => $profile_url,
		'meta'   => array(
			'tabindex' => -1,
		),
	) );
	$wp_admin_bar->add_menu( array(
		'parent' => 'user-actions',
		'id'     => 'edit-profile',
		'title'  => __( 'Edit My Profile' ),
		'href' => $profile_url,
	) );
	$wp_admin_bar->add_menu( array(
		'parent' => 'user-actions',
		'id'     => 'logout',
		'title'  => __( 'Log Out' ),
		'href'   => wp_logout_url(),
	) );
}

/**
 * Add the "Site Name" menu.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_site_menu( $wp_admin_bar ) {
	// Don't show for logged out users.
	if ( ! is_user_logged_in() )
		return;

	// Show only when the user is a member of this site, or they're a super admin.
	if ( ! is_user_member_of_blog() && ! is_super_admin() )
		return;

	$blogname = get_bloginfo('name');

	if ( empty( $blogname ) )
		$blogname = preg_replace( '#^(https?://)?(www.)?#', '', get_home_url() );

	if ( is_network_admin() ) {
		$blogname = sprintf( __('Network Admin: %s'), esc_html( get_current_site()->site_name ) );
	} elseif ( is_user_admin() ) {
		$blogname = sprintf( __('Global Dashboard: %s'), esc_html( get_current_site()->site_name ) );
	}

	$title = wp_html_excerpt( $blogname, 40, '&hellip;' );

	$wp_admin_bar->add_menu( array(
		'id'    => 'site-name',
		'title' => $title,
		'href'  => is_admin() ? home_url( '/' ) : admin_url(),
	) );

	// Create submenu items.

	if ( is_admin() ) {
		// Add an option to visit the site.
		$wp_admin_bar->add_menu( array(
			'parent' => 'site-name',
			'id'     => 'view-site',
			'title'  => __( 'Visit Site' ),
			'href'   => home_url( '/' ),
		) );

		if ( is_blog_admin() && is_multisite() && current_user_can( 'manage_sites' ) ) {
			$wp_admin_bar->add_menu( array(
				'parent' => 'site-name',
				'id'     => 'edit-site',
				'title'  => __( 'Edit Site' ),
				'href'   => network_admin_url( 'site-info.php?id=' . get_current_blog_id() ),
			) );
		}

	} else {
		// We're on the front end, link to the Dashboard.
		$wp_admin_bar->add_menu( array(
			'parent' => 'site-name',
			'id'     => 'dashboard',
			'title'  => __( 'Dashboard' ),
			'href'   => admin_url(),
		) );

		// Add the appearance submenu items.
		wp_admin_bar_appearance_menu( $wp_admin_bar );
	}
}

/**
 * Add the "My Sites/[Site Name]" menu and all submenus.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_my_sites_menu( $wp_admin_bar ) {
	// Don't show for logged out users or single site mode.
	if ( ! is_user_logged_in() || ! is_multisite() )
		return;

	// Show only when the user has at least one site, or they're a super admin.
	if ( count( $wp_admin_bar->user->blogs ) < 1 && ! is_super_admin() )
		return;

	$wp_admin_bar->add_menu( array(
		'id'    => 'my-sites',
		'title' => __( 'My Sites' ),
		'href'  => admin_url( 'my-sites.php' ),
	) );

	if ( is_super_admin() ) {
		$wp_admin_bar->add_group( array(
			'parent' => 'my-sites',
			'id'     => 'my-sites-super-admin',
		) );

		$wp_admin_bar->add_menu( array(
			'parent' => 'my-sites-super-admin',
			'id'     => 'network-admin',
			'title'  => __('Network Admin'),
			'href'   => network_admin_url(),
		) );

		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-d',
			'title'  => __( 'Dashboard' ),
			'href'   => network_admin_url(),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-s',
			'title'  => __( 'Sites' ),
			'href'   => network_admin_url( 'sites.php' ),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-u',
			'title'  => __( 'Users' ),
			'href'   => network_admin_url( 'users.php' ),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-t',
			'title'  => __( 'Themes' ),
			'href'   => network_admin_url( 'themes.php' ),
		) );
		$wp_admin_bar->add_menu( array(
			'parent' => 'network-admin',
			'id'     => 'network-admin-p',
			'title'  => __( 'Plugins' ),
			'href'   => network_admin_url( 'plugins.php' ),
		) );
	}

	// Add site links
	$wp_admin_bar->add_group( array(
		'parent' => 'my-sites',
		'id'     => 'my-sites-list',
		'meta'   => array(
			'class' => is_super_admin() ? 'ab-sub-secondary' : '',
		),
	) );

	foreach ( (array) $wp_admin_bar->user->blogs as $blog ) {
		switch_to_blog( $blog->userblog_id );

		$blavatar = '<div class="blavatar"></div>';

		$blogname = empty( $blog->blogname ) ? $blog->domain : $blog->blogname;
		$menu_id  = 'blog-' . $blog->userblog_id;

		$wp_admin_bar->add_menu( array(
			'parent'    => 'my-sites-list',
			'id'        => $menu_id,
			'title'     => $blavatar . $blogname,
			'href'      => admin_url(),
		) );

		$wp_admin_bar->add_menu( array(
			'parent' => $menu_id,
			'id'     => $menu_id . '-d',
			'title'  => __( 'Dashboard' ),
			'href'   => admin_url(),
		) );

		if ( current_user_can( get_post_type_object( 'post' )->cap->create_posts ) ) {
			$wp_admin_bar->add_menu( array(
				'parent' => $menu_id,
				'id'     => $menu_id . '-n',
				'title'  => __( 'New Post' ),
				'href'   => admin_url( 'post-new.php' ),
			) );
		}

		if ( current_user_can( 'edit_posts' ) ) {
			$wp_admin_bar->add_menu( array(
				'parent' => $menu_id,
				'id'     => $menu_id . '-c',
				'title'  => __( 'Manage Comments' ),
				'href'   => admin_url( 'edit-comments.php' ),
			) );
		}

		$wp_admin_bar->add_menu( array(
			'parent' => $menu_id,
			'id'     => $menu_id . '-v',
			'title'  => __( 'Visit Site' ),
			'href'   => home_url( '/' ),
		) );

		restore_current_blog();
	}
}

/**
 * Provide a shortlink.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_shortlink_menu( $wp_admin_bar ) {
	$short = wp_get_shortlink( 0, 'query' );
	$id = 'get-shortlink';

	if ( empty( $short ) )
		return;

	$html = '<input class="shortlink-input" type="text" readonly="readonly" value="' . esc_attr( $short ) . '" />';

	$wp_admin_bar->add_menu( array(
		'id' => $id,
		'title' => __( 'Shortlink' ),
		'href' => $short,
		'meta' => array( 'html' => $html ),
	) );
}

/**
 * Provide an edit link for posts and terms.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_edit_menu( $wp_admin_bar ) {
	global $tag, $wp_the_query;

	if ( is_admin() ) {
		$current_screen = get_current_screen();
		$post = get_post();

		if ( 'post' == $current_screen->base
			&& 'add' != $current_screen->action
			&& ( $post_type_object = get_post_type_object( $post->post_type ) )
			&& current_user_can( 'read_post', $post->ID )
			&& ( $post_type_object->public )
			&& ( $post_type_object->show_in_admin_bar ) )
		{
			if( 'draft' == $post->post_status ) {
				$preview_link = set_url_scheme( get_permalink( $post->ID ) );
				/** This filter is documented in wp-admin/includes/meta-boxes.php */
				$preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post );
				$wp_admin_bar->add_menu( array(
					'id' => 'preview',
					'title' => $post_type_object->labels->view_item,
					'href' => esc_url( $preview_link ),
					'meta' => array( 'target' => 'wp-preview-' . $post->ID ),
				) );
			} else {
				$wp_admin_bar->add_menu( array(
					'id' => 'view',
					'title' => $post_type_object->labels->view_item,
					'href' => get_permalink( $post->ID )
				) );
			}
		} elseif ( 'edit-tags' == $current_screen->base
			&& isset( $tag ) && is_object( $tag )
			&& ( $tax = get_taxonomy( $tag->taxonomy ) )
			&& $tax->public )
		{
			$wp_admin_bar->add_menu( array(
				'id' => 'view',
				'title' => $tax->labels->view_item,
				'href' => get_term_link( $tag )
			) );
		}
	} else {
		$current_object = $wp_the_query->get_queried_object();

		if ( empty( $current_object ) )
			return;

		if ( ! empty( $current_object->post_type )
			&& ( $post_type_object = get_post_type_object( $current_object->post_type ) )
			&& current_user_can( 'edit_post', $current_object->ID )
			&& $post_type_object->show_ui && $post_type_object->show_in_admin_bar )
		{
			$wp_admin_bar->add_menu( array(
				'id' => 'edit',
				'title' => $post_type_object->labels->edit_item,
				'href' => get_edit_post_link( $current_object->ID )
			) );
		} elseif ( ! empty( $current_object->taxonomy )
			&& ( $tax = get_taxonomy( $current_object->taxonomy ) )
			&& current_user_can( $tax->cap->edit_terms )
			&& $tax->show_ui )
		{
			$wp_admin_bar->add_menu( array(
				'id' => 'edit',
				'title' => $tax->labels->edit_item,
				'href' => get_edit_term_link( $current_object->term_id, $current_object->taxonomy )
			) );
		}
	}
}

/**
 * Add "Add New" menu.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_new_content_menu( $wp_admin_bar ) {
	$actions = array();

	$cpts = (array) get_post_types( array( 'show_in_admin_bar' => true ), 'objects' );

	if ( isset( $cpts['post'] ) && current_user_can( $cpts['post']->cap->create_posts ) )
		$actions[ 'post-new.php' ] = array( $cpts['post']->labels->name_admin_bar, 'new-post' );

	if ( isset( $cpts['attachment'] ) && current_user_can( 'upload_files' ) )
		$actions[ 'media-new.php' ] = array( $cpts['attachment']->labels->name_admin_bar, 'new-media' );

	if ( current_user_can( 'manage_links' ) )
		$actions[ 'link-add.php' ] = array( _x( 'Link', 'add new from admin bar' ), 'new-link' );

	if ( isset( $cpts['page'] ) && current_user_can( $cpts['page']->cap->create_posts ) )
		$actions[ 'post-new.php?post_type=page' ] = array( $cpts['page']->labels->name_admin_bar, 'new-page' );

	unset( $cpts['post'], $cpts['page'], $cpts['attachment'] );

	// Add any additional custom post types.
	foreach ( $cpts as $cpt ) {
		if ( ! current_user_can( $cpt->cap->create_posts ) )
			continue;

		$key = 'post-new.php?post_type=' . $cpt->name;
		$actions[ $key ] = array( $cpt->labels->name_admin_bar, 'new-' . $cpt->name );
	}
	// Avoid clash with parent node and a 'content' post type.
	if ( isset( $actions['post-new.php?post_type=content'] ) )
		$actions['post-new.php?post_type=content'][1] = 'add-new-content';

	if ( current_user_can( 'create_users' ) || current_user_can( 'promote_users' ) )
		$actions[ 'user-new.php' ] = array( _x( 'User', 'add new from admin bar' ), 'new-user' );

	if ( ! $actions )
		return;

	$title = '<span class="ab-icon"></span><span class="ab-label">' . _x( 'New', 'admin bar menu group label' ) . '</span>';

	$wp_admin_bar->add_menu( array(
		'id'    => 'new-content',
		'title' => $title,
		'href'  => admin_url( current( array_keys( $actions ) ) ),
		'meta'  => array(
			'title' => _x( 'Add New', 'admin bar menu group label' ),
		),
	) );

	foreach ( $actions as $link => $action ) {
		list( $title, $id ) = $action;

		$wp_admin_bar->add_menu( array(
			'parent'    => 'new-content',
			'id'        => $id,
			'title'     => $title,
			'href'      => admin_url( $link )
		) );
	}
}

/**
 * Add edit comments link with awaiting moderation count bubble.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_comments_menu( $wp_admin_bar ) {
	if ( !current_user_can('edit_posts') )
		return;

	$awaiting_mod = wp_count_comments();
	$awaiting_mod = $awaiting_mod->moderated;
	$awaiting_title = esc_attr( sprintf( _n( '%s comment awaiting moderation', '%s comments awaiting moderation', $awaiting_mod ), number_format_i18n( $awaiting_mod ) ) );

	$icon  = '<span class="ab-icon"></span>';
	$title = '<span id="ab-awaiting-mod" class="ab-label awaiting-mod pending-count count-' . $awaiting_mod . '">' . number_format_i18n( $awaiting_mod ) . '</span>';

	$wp_admin_bar->add_menu( array(
		'id'    => 'comments',
		'title' => $icon . $title,
		'href'  => admin_url('edit-comments.php'),
		'meta'  => array( 'title' => $awaiting_title ),
	) );
}

/**
 * Add appearance submenu items to the "Site Name" menu.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_appearance_menu( $wp_admin_bar ) {
	$wp_admin_bar->add_group( array( 'parent' => 'site-name', 'id' => 'appearance' ) );

	if ( current_user_can( 'switch_themes' ) || current_user_can( 'edit_theme_options' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'themes', 'title' => __('Themes'), 'href' => admin_url('themes.php') ) );

	if ( ! current_user_can( 'edit_theme_options' ) )
		return;

	if ( current_user_can( 'customize' ) ) {
		$current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
		$wp_admin_bar->add_menu( array(
			'parent' => 'appearance',
			'id'     => 'customize',
			'title'  => __('Customize'),
			'href'   => add_query_arg( 'url', urlencode( $current_url ), wp_customize_url() ),
			'meta'   => array(
				'class' => 'hide-if-no-customize',
			),
		) );
		add_action( 'wp_before_admin_bar_render', 'wp_customize_support_script' );
	}

	if ( current_theme_supports( 'widgets' )  )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'widgets', 'title' => __('Widgets'), 'href' => admin_url('widgets.php') ) );

	if ( current_theme_supports( 'menus' ) || current_theme_supports( 'widgets' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'menus', 'title' => __('Menus'), 'href' => admin_url('nav-menus.php') ) );

	if ( current_theme_supports( 'custom-background' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'background', 'title' => __('Background'), 'href' => admin_url('themes.php?page=custom-background') ) );

	if ( current_theme_supports( 'custom-header' ) )
		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'header', 'title' => __('Header'), 'href' => admin_url('themes.php?page=custom-header') ) );
}

/**
 * Provide an update link if theme/plugin/core updates are available.
 *
 * @since 3.1.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_updates_menu( $wp_admin_bar ) {

	$update_data = wp_get_update_data();

	if ( !$update_data['counts']['total'] )
		return;

	$title = '<span class="ab-icon"></span><span class="ab-label">' . number_format_i18n( $update_data['counts']['total'] ) . '</span>';
	$title .= '<span class="screen-reader-text">' . $update_data['title'] . '</span>';

	$wp_admin_bar->add_menu( array(
		'id'    => 'updates',
		'title' => $title,
		'href'  => network_admin_url( 'update-core.php' ),
		'meta'  => array(
			'title' => $update_data['title'],
		),
	) );
}

/**
 * Add search form.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_search_menu( $wp_admin_bar ) {
	if ( is_admin() )
		return;

	$form  = '<form action="' . esc_url( home_url( '/' ) ) . '" method="get" id="adminbarsearch">';
	$form .= '<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />';
	$form .= '<input type="submit" class="adminbar-button" value="' . __('Search') . '"/>';
	$form .= '</form>';

	$wp_admin_bar->add_menu( array(
		'parent' => 'top-secondary',
		'id'     => 'search',
		'title'  => $form,
		'meta'   => array(
			'class'    => 'admin-bar-search',
			'tabindex' => -1,
		)
	) );
}

/**
 * Add secondary menus.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function wp_admin_bar_add_secondary_groups( $wp_admin_bar ) {
	$wp_admin_bar->add_group( array(
		'id'     => 'top-secondary',
		'meta'   => array(
			'class' => 'ab-top-secondary',
		),
	) );

	$wp_admin_bar->add_group( array(
		'parent' => 'wp-logo',
		'id'     => 'wp-logo-external',
		'meta'   => array(
			'class' => 'ab-sub-secondary',
		),
	) );
}

/**
 * Style and scripts for the admin bar.
 *
 * @since 3.1.0
 */
function wp_admin_bar_header() { ?>
<style type="text/css" media="print">#wpadminbar { display:none; }</style>
<?php
}

/**
 * Default admin bar callback.
 *
 * @since 3.1.0
 */
function _admin_bar_bump_cb() { ?>
<style type="text/css" media="screen">
	html { margin-top: 32px !important; }
	* html body { margin-top: 32px !important; }
	@media screen and ( max-width: 782px ) {
		html { margin-top: 46px !important; }
		* html body { margin-top: 46px !important; }
	}
</style>
<?php
}

/**
 * Set the display status of the admin bar.
 *
 * This can be called immediately upon plugin load. It does not need to be called from a function hooked to the init action.
 *
 * @since 3.1.0
 *
 * @param bool $show Whether to allow the admin bar to show.
 * @return void
 */
function show_admin_bar( $show ) {
	global $show_admin_bar;
	$show_admin_bar = (bool) $show;
}

/**
 * Determine whether the admin bar should be showing.
 *
 * @since 3.1.0
 *
 * @return bool Whether the admin bar should be showing.
 */
function is_admin_bar_showing() {
	global $show_admin_bar, $pagenow;

	// For all these types of requests, we never want an admin bar.
	if ( defined('XMLRPC_REQUEST') || defined('DOING_AJAX') || defined('IFRAME_REQUEST') )
		return false;

	// Integrated into the admin.
	if ( is_admin() )
		return true;

	if ( ! isset( $show_admin_bar ) ) {
		if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) {
			$show_admin_bar = false;
		} else {
			$show_admin_bar = _get_admin_bar_pref();
		}
	}

	/**
	 * Filter whether to show the admin bar.
	 *
	 * Returning false to this hook is the recommended way to hide the admin bar.
	 * The user's display preference is used for logged in users.
	 *
	 * @since 3.1.0
	 *
	 * @param bool $show_admin_bar Whether the admin bar should be shown. Default false.
	 */
	$show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar );

	return $show_admin_bar;
}

/**
 * Retrieve the admin bar display preference of a user.
 *
 * @since 3.1.0
 * @access private
 *
 * @param string $context Context of this preference check. Defaults to 'front'. The 'admin'
 * 	preference is no longer used.
 * @param int $user Optional. ID of the user to check, defaults to 0 for current user.
 * @return bool Whether the admin bar should be showing for this user.
 */
function _get_admin_bar_pref( $context = 'front', $user = 0 ) {
	$pref = get_user_option( "show_admin_bar_{$context}", $user );
	if ( false === $pref )
		return true;

	return 'true' === $pref;
}

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<?php

/**

* Admin Bar

* This code handles the building and rendering of the press bar.

/**

* Instantiate the admin bar object and set it up as a global for access elsewhere.

* UNHOOKING THIS FUNCTION WILL NOT PROPERLY REMOVE THE ADMIN BAR.

* For that, use show_admin_bar(false) or the 'show_admin_bar' filter.

* @since 3.1.0

* @access private

* @return bool Whether the admin bar was successfully initialized.

function _wp_admin_bar_init() {

global $wp_admin_bar;

if ( ! is_admin_bar_showing() )

return false;

/* Load the admin bar class code ready for instantiation */

require( ABSPATH . WPINC . '/class-wp-admin-bar.php' );

/* Instantiate the admin bar */

/**

* Filter the admin bar class to instantiate.

* @since 3.1.0

* @param string $wp_admin_bar_class Admin bar class to use. Default 'WP_Admin_Bar'.

$admin_bar_class = apply_filters( 'wp_admin_bar_class', 'WP_Admin_Bar' );

if ( class_exists( $admin_bar_class ) )

$wp_admin_bar = new $admin_bar_class;

else

return false;

$wp_admin_bar->initialize();

$wp_admin_bar->add_menus();

return true;

}

// Don't remove. Wrong way to disable.

add_action( 'template_redirect', '_wp_admin_bar_init', 0 );

add_action( 'admin_init', '_wp_admin_bar_init' );

/**

* Render the admin bar to the page based on the $wp_admin_bar->menu member var.

* This is called very late on the footer actions so that it will render after anything else being

* added to the footer.

* It includes the action "admin_bar_menu" which should be used to hook in and

* add new menus to the admin bar. That way you can be sure that you are adding at most optimal point,

* right before the admin bar is rendered. This also gives you access to the $post global, among others.

* @since 3.1.0

function wp_admin_bar_render() {

global $wp_admin_bar;

if ( ! is_admin_bar_showing() || ! is_object( $wp_admin_bar ) )

return false;

/**

* Load all necessary admin bar items.

* This is the hook used to add, remove, or manipulate admin bar items.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar WP_Admin_Bar instance, passed by reference

do_action_ref_array( 'admin_bar_menu', array( &$wp_admin_bar ) );

/**

* Fires before the admin bar is rendered.

* @since 3.1.0

do_action( 'wp_before_admin_bar_render' );

$wp_admin_bar->render();

/**

* Fires after the admin bar is rendered.

* @since 3.1.0

do_action( 'wp_after_admin_bar_render' );

}

add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );

add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );

/**

* Add the WordPress logo menu.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_wp_menu( $wp_admin_bar ) {

$wp_admin_bar->add_menu( array(

'id' => 'wp-logo',

'title' => '<span class="ab-icon"></span>',

'href' => self_admin_url( 'about.php' ),

'meta' => array(

'title' => __('About WordPress'),

) );

if ( is_user_logged_in() ) {

// Add "About WordPress" link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo',

'id' => 'about',

'title' => __('About WordPress'),

'href' => self_admin_url( 'about.php' ),

) );

}

// Add WordPress.org link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'wporg',

'title' => __('WordPress.org'),

'href' => __('https://wordpress.org/'),

) );

// Add codex link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'documentation',

'title' => __('Documentation'),

'href' => __('http://codex.wordpress.org/'),

) );

// Add forums link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'support-forums',

'title' => __('Support Forums'),

'href' => __('https://wordpress.org/support/'),

) );

// Add feedback link

$wp_admin_bar->add_menu( array(

'parent' => 'wp-logo-external',

'id' => 'feedback',

'title' => __('Feedback'),

'href' => __('https://wordpress.org/support/forum/requests-and-feedback'),

) );

}

/**

* Add the sidebar toggle button.

* @since 3.8.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_sidebar_toggle( $wp_admin_bar ) {

if ( is_admin() ) {

$wp_admin_bar->add_menu( array(

'id' => 'menu-toggle',

'title' => '<span class="ab-icon"></span><span class="screen-reader-text">' . __( 'Menu' ) . '</span>',

'href' => '#',

) );

}

/**

* Add the "My Account" item.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_my_account_item( $wp_admin_bar ) {

$user_id = get_current_user_id();

$current_user = wp_get_current_user();

$profile_url = get_edit_profile_url( $user_id );

if ( ! $user_id )

return;

$avatar = get_avatar( $user_id, 26 );

$howdy = sprintf( __('Howdy, %1$s'), $current_user->display_name );

$class = empty( $avatar ) ? '' : 'with-avatar';

$wp_admin_bar->add_menu( array(

'id' => 'my-account',

'parent' => 'top-secondary',

'title' => $howdy . $avatar,

'href' => $profile_url,

'meta' => array(

'class' => $class,

'title' => __('My Account'),

) );

}

/**

* Add the "My Account" submenu items.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_my_account_menu( $wp_admin_bar ) {

$user_id = get_current_user_id();

$current_user = wp_get_current_user();

$profile_url = get_edit_profile_url( $user_id );

if ( ! $user_id )

return;

$wp_admin_bar->add_group( array(

'parent' => 'my-account',

'id' => 'user-actions',

) );

$user_info = get_avatar( $user_id, 64 );

$user_info .= "<span class='display-name'>{$current_user->display_name}</span>";

if ( $current_user->display_name !== $current_user->user_login )

$user_info .= "<span class='username'>{$current_user->user_login}</span>";

$wp_admin_bar->add_menu( array(

'parent' => 'user-actions',

'id' => 'user-info',

'title' => $user_info,

'href' => $profile_url,

'meta' => array(

'tabindex' => -1,

) );

$wp_admin_bar->add_menu( array(

'parent' => 'user-actions',

'id' => 'edit-profile',

'title' => __( 'Edit My Profile' ),

'href' => $profile_url,

) );

$wp_admin_bar->add_menu( array(

'parent' => 'user-actions',

'id' => 'logout',

'title' => __( 'Log Out' ),

'href' => wp_logout_url(),

) );

}

/**

* Add the "Site Name" menu.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_site_menu( $wp_admin_bar ) {

// Don't show for logged out users.

if ( ! is_user_logged_in() )

return;

// Show only when the user is a member of this site, or they're a super admin.

if ( ! is_user_member_of_blog() && ! is_super_admin() )

return;

$blogname = get_bloginfo('name');

if ( empty( $blogname ) )

$blogname = preg_replace( '#^(https?://)?(www.)?#', '', get_home_url() );

if ( is_network_admin() ) {

$blogname = sprintf( __('Network Admin: %s'), esc_html( get_current_site()->site_name ) );

} elseif ( is_user_admin() ) {

$blogname = sprintf( __('Global Dashboard: %s'), esc_html( get_current_site()->site_name ) );

}

$title = wp_html_excerpt( $blogname, 40, '…' );

$wp_admin_bar->add_menu( array(

'id' => 'site-name',

'title' => $title,

'href' => is_admin() ? home_url( '/' ) : admin_url(),

) );

// Create submenu items.

if ( is_admin() ) {

// Add an option to visit the site.

$wp_admin_bar->add_menu( array(

'parent' => 'site-name',

'id' => 'view-site',

'title' => __( 'Visit Site' ),

'href' => home_url( '/' ),

) );

if ( is_blog_admin() && is_multisite() && current_user_can( 'manage_sites' ) ) {

$wp_admin_bar->add_menu( array(

'parent' => 'site-name',

'id' => 'edit-site',

'title' => __( 'Edit Site' ),

'href' => network_admin_url( 'site-info.php?id=' . get_current_blog_id() ),

) );

}

} else {

// We're on the front end, link to the Dashboard.

$wp_admin_bar->add_menu( array(

'parent' => 'site-name',

'id' => 'dashboard',

'title' => __( 'Dashboard' ),

'href' => admin_url(),

) );

// Add the appearance submenu items.

wp_admin_bar_appearance_menu( $wp_admin_bar );

}

/**

* Add the "My Sites/[Site Name]" menu and all submenus.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_my_sites_menu( $wp_admin_bar ) {

// Don't show for logged out users or single site mode.

if ( ! is_user_logged_in() || ! is_multisite() )

return;

// Show only when the user has at least one site, or they're a super admin.

if ( count( $wp_admin_bar->user->blogs ) < 1 && ! is_super_admin() )

return;

$wp_admin_bar->add_menu( array(

'id' => 'my-sites',

'title' => __( 'My Sites' ),

'href' => admin_url( 'my-sites.php' ),

) );

if ( is_super_admin() ) {

$wp_admin_bar->add_group( array(

'parent' => 'my-sites',

'id' => 'my-sites-super-admin',

) );

$wp_admin_bar->add_menu( array(

'parent' => 'my-sites-super-admin',

'id' => 'network-admin',

'title' => __('Network Admin'),

'href' => network_admin_url(),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-d',

'title' => __( 'Dashboard' ),

'href' => network_admin_url(),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-s',

'title' => __( 'Sites' ),

'href' => network_admin_url( 'sites.php' ),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-u',

'title' => __( 'Users' ),

'href' => network_admin_url( 'users.php' ),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-t',

'title' => __( 'Themes' ),

'href' => network_admin_url( 'themes.php' ),

) );

$wp_admin_bar->add_menu( array(

'parent' => 'network-admin',

'id' => 'network-admin-p',

'title' => __( 'Plugins' ),

'href' => network_admin_url( 'plugins.php' ),

) );

}

// Add site links

$wp_admin_bar->add_group( array(

'parent' => 'my-sites',

'id' => 'my-sites-list',

'meta' => array(

'class' => is_super_admin() ? 'ab-sub-secondary' : '',

) );

foreach ( (array) $wp_admin_bar->user->blogs as $blog ) {

switch_to_blog( $blog->userblog_id );

$blavatar = '<div class="blavatar"></div>';

$blogname = empty( $blog->blogname ) ? $blog->domain : $blog->blogname;

$menu_id = 'blog-' . $blog->userblog_id;

$wp_admin_bar->add_menu( array(

'parent' => 'my-sites-list',

'id' => $menu_id,

'title' => $blavatar . $blogname,

'href' => admin_url(),

) );

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-d',

'title' => __( 'Dashboard' ),

'href' => admin_url(),

) );

if ( current_user_can( get_post_type_object( 'post' )->cap->create_posts ) ) {

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-n',

'title' => __( 'New Post' ),

'href' => admin_url( 'post-new.php' ),

) );

}

if ( current_user_can( 'edit_posts' ) ) {

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-c',

'title' => __( 'Manage Comments' ),

'href' => admin_url( 'edit-comments.php' ),

) );

}

$wp_admin_bar->add_menu( array(

'parent' => $menu_id,

'id' => $menu_id . '-v',

'title' => __( 'Visit Site' ),

'href' => home_url( '/' ),

) );

restore_current_blog();

}

/**

* Provide a shortlink.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_shortlink_menu( $wp_admin_bar ) {

$short = wp_get_shortlink( 0, 'query' );

$id = 'get-shortlink';

if ( empty( $short ) )

return;

$html = '<input class="shortlink-input" type="text" readonly="readonly" value="' . esc_attr( $short ) . '" />';

$wp_admin_bar->add_menu( array(

'id' => $id,

'title' => __( 'Shortlink' ),

'href' => $short,

'meta' => array( 'html' => $html ),

) );

}

/**

* Provide an edit link for posts and terms.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_edit_menu( $wp_admin_bar ) {

global $tag, $wp_the_query;

if ( is_admin() ) {

$current_screen = get_current_screen();

$post = get_post();

if ( 'post' == $current_screen->base

&& 'add' != $current_screen->action

&& ( $post_type_object = get_post_type_object( $post->post_type ) )

&& current_user_can( 'read_post', $post->ID )

&& ( $post_type_object->public )

&& ( $post_type_object->show_in_admin_bar ) )

{

if( 'draft' == $post->post_status ) {

$preview_link = set_url_scheme( get_permalink( $post->ID ) );

/** This filter is documented in wp-admin/includes/meta-boxes.php */

$preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post );

$wp_admin_bar->add_menu( array(

'id' => 'preview',

'title' => $post_type_object->labels->view_item,

'href' => esc_url( $preview_link ),

'meta' => array( 'target' => 'wp-preview-' . $post->ID ),

) );

} else {

$wp_admin_bar->add_menu( array(

'id' => 'view',

'title' => $post_type_object->labels->view_item,

'href' => get_permalink( $post->ID )

) );

}

} elseif ( 'edit-tags' == $current_screen->base

&& isset( $tag ) && is_object( $tag )

&& ( $tax = get_taxonomy( $tag->taxonomy ) )

&& $tax->public )

{

$wp_admin_bar->add_menu( array(

'id' => 'view',

'title' => $tax->labels->view_item,

'href' => get_term_link( $tag )

) );

}

} else {

$current_object = $wp_the_query->get_queried_object();

if ( empty( $current_object ) )

return;

if ( ! empty( $current_object->post_type )

&& ( $post_type_object = get_post_type_object( $current_object->post_type ) )

&& current_user_can( 'edit_post', $current_object->ID )

&& $post_type_object->show_ui && $post_type_object->show_in_admin_bar )

{

$wp_admin_bar->add_menu( array(

'id' => 'edit',

'title' => $post_type_object->labels->edit_item,

'href' => get_edit_post_link( $current_object->ID )

) );

} elseif ( ! empty( $current_object->taxonomy )

&& ( $tax = get_taxonomy( $current_object->taxonomy ) )

&& current_user_can( $tax->cap->edit_terms )

&& $tax->show_ui )

{

$wp_admin_bar->add_menu( array(

'id' => 'edit',

'title' => $tax->labels->edit_item,

'href' => get_edit_term_link( $current_object->term_id, $current_object->taxonomy )

) );

}

/**

* Add "Add New" menu.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_new_content_menu( $wp_admin_bar ) {

$actions = array();

$cpts = (array) get_post_types( array( 'show_in_admin_bar' => true ), 'objects' );

if ( isset( $cpts['post'] ) && current_user_can( $cpts['post']->cap->create_posts ) )

$actions[ 'post-new.php' ] = array( $cpts['post']->labels->name_admin_bar, 'new-post' );

if ( isset( $cpts['attachment'] ) && current_user_can( 'upload_files' ) )

$actions[ 'media-new.php' ] = array( $cpts['attachment']->labels->name_admin_bar, 'new-media' );

if ( current_user_can( 'manage_links' ) )

$actions[ 'link-add.php' ] = array( _x( 'Link', 'add new from admin bar' ), 'new-link' );

if ( isset( $cpts['page'] ) && current_user_can( $cpts['page']->cap->create_posts ) )

$actions[ 'post-new.php?post_type=page' ] = array( $cpts['page']->labels->name_admin_bar, 'new-page' );

unset( $cpts['post'], $cpts['page'], $cpts['attachment'] );

// Add any additional custom post types.

foreach ( $cpts as $cpt ) {

if ( ! current_user_can( $cpt->cap->create_posts ) )

continue;

$key = 'post-new.php?post_type=' . $cpt->name;

$actions[ $key ] = array( $cpt->labels->name_admin_bar, 'new-' . $cpt->name );

}

// Avoid clash with parent node and a 'content' post type.

if ( isset( $actions['post-new.php?post_type=content'] ) )

$actions['post-new.php?post_type=content'][1] = 'add-new-content';

if ( current_user_can( 'create_users' ) || current_user_can( 'promote_users' ) )

$actions[ 'user-new.php' ] = array( _x( 'User', 'add new from admin bar' ), 'new-user' );

if ( ! $actions )

return;

$title = '<span class="ab-icon"></span><span class="ab-label">' . _x( 'New', 'admin bar menu group label' ) . '</span>';

$wp_admin_bar->add_menu( array(

'id' => 'new-content',

'title' => $title,

'href' => admin_url( current( array_keys( $actions ) ) ),

'meta' => array(

'title' => _x( 'Add New', 'admin bar menu group label' ),

) );

foreach ( $actions as $link => $action ) {

list( $title, $id ) = $action;

$wp_admin_bar->add_menu( array(

'parent' => 'new-content',

'id' => $id,

'title' => $title,

'href' => admin_url( $link )

) );

}

/**

* Add edit comments link with awaiting moderation count bubble.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_comments_menu( $wp_admin_bar ) {

if ( !current_user_can('edit_posts') )

return;

$awaiting_mod = wp_count_comments();

$awaiting_mod = $awaiting_mod->moderated;

$awaiting_title = esc_attr( sprintf( _n( '%s comment awaiting moderation', '%s comments awaiting moderation', $awaiting_mod ), number_format_i18n( $awaiting_mod ) ) );

$icon = '<span class="ab-icon"></span>';

$title = '<span id="ab-awaiting-mod" class="ab-label awaiting-mod pending-count count-' . $awaiting_mod . '">' . number_format_i18n( $awaiting_mod ) . '</span>';

$wp_admin_bar->add_menu( array(

'id' => 'comments',

'title' => $icon . $title,

'href' => admin_url('edit-comments.php'),

'meta' => array( 'title' => $awaiting_title ),

) );

}

/**

* Add appearance submenu items to the "Site Name" menu.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_appearance_menu( $wp_admin_bar ) {

$wp_admin_bar->add_group( array( 'parent' => 'site-name', 'id' => 'appearance' ) );

if ( current_user_can( 'switch_themes' ) || current_user_can( 'edit_theme_options' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'themes', 'title' => __('Themes'), 'href' => admin_url('themes.php') ) );

if ( ! current_user_can( 'edit_theme_options' ) )

return;

if ( current_user_can( 'customize' ) ) {

$current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

$wp_admin_bar->add_menu( array(

'parent' => 'appearance',

'id' => 'customize',

'title' => __('Customize'),

'href' => add_query_arg( 'url', urlencode( $current_url ), wp_customize_url() ),

'meta' => array(

'class' => 'hide-if-no-customize',

) );

add_action( 'wp_before_admin_bar_render', 'wp_customize_support_script' );

}

if ( current_theme_supports( 'widgets' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'widgets', 'title' => __('Widgets'), 'href' => admin_url('widgets.php') ) );

if ( current_theme_supports( 'menus' ) || current_theme_supports( 'widgets' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'menus', 'title' => __('Menus'), 'href' => admin_url('nav-menus.php') ) );

if ( current_theme_supports( 'custom-background' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'background', 'title' => __('Background'), 'href' => admin_url('themes.php?page=custom-background') ) );

if ( current_theme_supports( 'custom-header' ) )

$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'header', 'title' => __('Header'), 'href' => admin_url('themes.php?page=custom-header') ) );

}

/**

* Provide an update link if theme/plugin/core updates are available.

* @since 3.1.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_updates_menu( $wp_admin_bar ) {

$update_data = wp_get_update_data();

if ( !$update_data['counts']['total'] )

return;

$title = '<span class="ab-icon"></span><span class="ab-label">' . number_format_i18n( $update_data['counts']['total'] ) . '</span>';

$title .= '<span class="screen-reader-text">' . $update_data['title'] . '</span>';

$wp_admin_bar->add_menu( array(

'id' => 'updates',

'title' => $title,

'href' => network_admin_url( 'update-core.php' ),

'meta' => array(

'title' => $update_data['title'],

) );

}

/**

* Add search form.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_search_menu( $wp_admin_bar ) {

if ( is_admin() )

return;

$form = '<form action="' . esc_url( home_url( '/' ) ) . '" method="get" id="adminbarsearch">';

$form .= '<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />';

$form .= '<input type="submit" class="adminbar-button" value="' . __('Search') . '"/>';

$form .= '</form>';

$wp_admin_bar->add_menu( array(

'parent' => 'top-secondary',

'id' => 'search',

'title' => $form,

'meta' => array(

'class' => 'admin-bar-search',

'tabindex' => -1,

)

) );

}

/**

* Add secondary menus.

* @since 3.3.0

* @param WP_Admin_Bar $wp_admin_bar

function wp_admin_bar_add_secondary_groups( $wp_admin_bar ) {

$wp_admin_bar->add_group( array(

'id' => 'top-secondary',

'meta' => array(

'class' => 'ab-top-secondary',

) );

$wp_admin_bar->add_group( array(

'parent' => 'wp-logo',

'id' => 'wp-logo-external',

'meta' => array(

'class' => 'ab-sub-secondary',

) );

}

/**

* Style and scripts for the admin bar.

* @since 3.1.0

function wp_admin_bar_header() { ?>

<?php

}

/**

* Default admin bar callback.

* @since 3.1.0

function _admin_bar_bump_cb() { ?>

html { margin-top: 32px !important; }

* html body { margin-top: 32px !important; }

@media screen and ( max-width: 782px ) {

html { margin-top: 46px !important; }

* html body { margin-top: 46px !important; }

}

</style>

<?php

}

/**

* Set the display status of the admin bar.

* This can be called immediately upon plugin load. It does not need to be called from a function hooked to the init action.

* @since 3.1.0

* @param bool $show Whether to allow the admin bar to show.

* @return void

function show_admin_bar( $show ) {

global $show_admin_bar;

$show_admin_bar = (bool) $show;

}

/**

* Determine whether the admin bar should be showing.

* @since 3.1.0

* @return bool Whether the admin bar should be showing.

function is_admin_bar_showing() {

global $show_admin_bar, $pagenow;

// For all these types of requests, we never want an admin bar.

if ( defined('XMLRPC_REQUEST') || defined('DOING_AJAX') || defined('IFRAME_REQUEST') )

return false;

// Integrated into the admin.

if ( is_admin() )

return true;

if ( ! isset( $show_admin_bar ) ) {

if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) {

$show_admin_bar = false;

} else {

$show_admin_bar = _get_admin_bar_pref();

}

/**

* Filter whether to show the admin bar.

* Returning false to this hook is the recommended way to hide the admin bar.

* The user's display preference is used for logged in users.

* @since 3.1.0

* @param bool $show_admin_bar Whether the admin bar should be shown. Default false.

$show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar );

return $show_admin_bar;

}

/**

* Retrieve the admin bar display preference of a user.

* @since 3.1.0

* @access private

* @param string $context Context of this preference check. Defaults to 'front'. The 'admin'

* preference is no longer used.

* @param int $user Optional. ID of the user to check, defaults to 0 for current user.

* @return bool Whether the admin bar should be showing for this user.

function _get_admin_bar_pref( $context = 'front', $user = 0 ) {

$pref = get_user_option( "show_admin_bar_{$context}", $user );

if ( false === $pref )

return true;

return 'true' === $pref;

}

WordPressを読む　70 /blog/wp-includes/nav-menu-template.php

2014/12/04 Wordpress

<?php
/**
 * Navigation Menu template functions
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 3.0.0
 */

/**
 * Create HTML list of nav menu items.
 *
 * @since 3.0.0
 * @uses Walker
 */
class Walker_Nav_Menu extends Walker {
	/**
	 * What the class handles.
	 *
	 * @see Walker::$tree_type
	 * @since 3.0.0
	 * @var string
	 */
	public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

	/**
	 * Database fields to use.
	 *
	 * @see Walker::$db_fields
	 * @since 3.0.0
	 * @todo Decouple this.
	 * @var array
	 */
	public $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );

	/**
	 * Starts the list before the elements are added.
	 *
	 * @see Walker::start_lvl()
	 *
	 * @since 3.0.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu()
	 */
	public function start_lvl( &$output, $depth = 0, $args = array() ) {
		$indent = str_repeat("\t", $depth);
		$output .= "\n$indent<ul class=\"sub-menu\">\n";
	}

	/**
	 * Ends the list of after the elements are added.
	 *
	 * @see Walker::end_lvl()
	 *
	 * @since 3.0.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu()
	 */
	public function end_lvl( &$output, $depth = 0, $args = array() ) {
		$indent = str_repeat("\t", $depth);
		$output .= "$indent</ul>\n";
	}

	/**
	 * Start the element output.
	 *
	 * @see Walker::start_el()
	 *
	 * @since 3.0.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param object $item   Menu item data object.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu()
	 * @param int    $id     Current item ID.
	 */
	public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

		$classes = empty( $item->classes ) ? array() : (array) $item->classes;
		$classes[] = 'menu-item-' . $item->ID;

		/**
		 * Filter the CSS class(es) applied to a menu item's <li>.
		 *
		 * @since 3.0.0
		 *
		 * @see wp_nav_menu()
		 *
		 * @param array  $classes The CSS classes that are applied to the menu item's <li>.
		 * @param object $item    The current menu item.
		 * @param array  $args    An array of wp_nav_menu() arguments.
		 */
		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );
		$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

		/**
		 * Filter the ID applied to a menu item's <li>.
		 *
		 * @since 3.0.1
		 *
		 * @see wp_nav_menu()
		 *
		 * @param string $menu_id The ID that is applied to the menu item's <li>.
		 * @param object $item    The current menu item.
		 * @param array  $args    An array of wp_nav_menu() arguments.
		 */
		$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );
		$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

		$output .= $indent . '<li' . $id . $class_names .'>';

		$atts = array();
		$atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
		$atts['target'] = ! empty( $item->target )     ? $item->target     : '';
		$atts['rel']    = ! empty( $item->xfn )        ? $item->xfn        : '';
		$atts['href']   = ! empty( $item->url )        ? $item->url        : '';

		/**
		 * Filter the HTML attributes applied to a menu item's <a>.
		 *
		 * @since 3.6.0
		 *
		 * @see wp_nav_menu()
		 *
		 * @param array $atts {
		 *     The HTML attributes applied to the menu item's <a>, empty strings are ignored.
		 *
		 *     @type string $title  Title attribute.
		 *     @type string $target Target attribute.
		 *     @type string $rel    The rel attribute.
		 *     @type string $href   The href attribute.
		 * }
		 * @param object $item The current menu item.
		 * @param array  $args An array of wp_nav_menu() arguments.
		 */
		$atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args );

		$attributes = '';
		foreach ( $atts as $attr => $value ) {
			if ( ! empty( $value ) ) {
				$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
				$attributes .= ' ' . $attr . '="' . $value . '"';
			}
		}

		$item_output = $args->before;
		$item_output .= '<a'. $attributes .'>';
		/** This filter is documented in wp-includes/post-template.php */
		$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
		$item_output .= '</a>';
		$item_output .= $args->after;

		/**
		 * Filter a menu item's starting output.
		 *
		 * The menu item's starting output only includes $args->before, the opening <a>,
		 * the menu item's title, the closing </a>, and $args->after. Currently, there is
		 * no filter for modifying the opening and closing <li> for a menu item.
		 *
		 * @since 3.0.0
		 *
		 * @see wp_nav_menu()
		 *
		 * @param string $item_output The menu item's starting HTML output.
		 * @param object $item        Menu item data object.
		 * @param int    $depth       Depth of menu item. Used for padding.
		 * @param array  $args        An array of wp_nav_menu() arguments.
		 */
		$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
	}

	/**
	 * Ends the element output, if needed.
	 *
	 * @see Walker::end_el()
	 *
	 * @since 3.0.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param object $item   Page data object. Not used.
	 * @param int    $depth  Depth of page. Not Used.
	 * @param array  $args   An array of arguments. @see wp_nav_menu()
	 */
	public function end_el( &$output, $item, $depth = 0, $args = array() ) {
		$output .= "</li>\n";
	}

} // Walker_Nav_Menu

/**
 * Displays a navigation menu.
 *
 * @since 3.0.0
 *
 * @param array $args {
 *     Optional. Array of nav menu arguments.
 *
 *     @type string        $menu            Desired menu. Accepts (matching in order) id, slug, name. Default empty.
 *     @type string        $menu_class      CSS class to use for the ul element which forms the menu. Default 'menu'.
 *     @type string        $menu_id         The ID that is applied to the ul element which forms the menu.
 *                                          Default is the menu slug, incremented.
 *     @type string        $container       Whether to wrap the ul, and what to wrap it with. Default 'div'.
 *     @type string        $container_class Class that is applied to the container. Default 'menu-{menu slug}-container'.
 *     @type string        $container_id    The ID that is applied to the container. Default empty.
 *     @type callback|bool $fallback_cb     If the menu doesn't exists, a callback function will fire.
 *                                          Default is 'wp_page_menu'. Set to false for no fallback.
 *     @type string        $before          Text before the link text. Default empty.
 *     @type string        $after           Text after the link text. Default empty.
 *     @type string        $link_before     Text before the link. Default empty.
 *     @type string        $link_after      Text after the link. Default empty.
 *     @type bool          $echo            Whether to echo the menu or return it. Default true.
 *     @type int           $depth           How many levels of the hierarchy are to be included. 0 means all. Default 0.
 *     @type object        $walker          Instance of a custom walker class. Default empty.
 *     @type string        $theme_location  Theme location to be used. Must be registered with register_nav_menu()
 *                                          in order to be selectable by the user.
 *     @type string        $items_wrap      How the list items should be wrapped. Default is a ul with an id and class.
 *                                          Uses printf() format with numbered placeholders.
 * }
 * @return mixed Menu output if $echo is false, false if there are no items or no menu was found.
 */
function wp_nav_menu( $args = array() ) {
	static $menu_id_slugs = array();

	$defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '',
	'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '', 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',
	'depth' => 0, 'walker' => '', 'theme_location' => '' );

	$args = wp_parse_args( $args, $defaults );
	/**
	 * Filter the arguments used to display a navigation menu.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param array $args Array of wp_nav_menu() arguments.
	 */
	$args = apply_filters( 'wp_nav_menu_args', $args );
	$args = (object) $args;

	/**
	 * Filter whether to short-circuit the wp_nav_menu() output.
	 *
	 * Returning a non-null value to the filter will short-circuit
	 * wp_nav_menu(), echoing that value if $args->echo is true,
	 * returning that value otherwise.
	 *
	 * @since 3.9.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string|null $output Nav menu output to short-circuit with. Default null.
	 * @param object      $args   An object containing wp_nav_menu() arguments.
	 */
	$nav_menu = apply_filters( 'pre_wp_nav_menu', null, $args );

	if ( null !== $nav_menu ) {
		if ( $args->echo ) {
			echo $nav_menu;
			return;
		}

		return $nav_menu;
	}

	// Get the nav menu based on the requested menu
	$menu = wp_get_nav_menu_object( $args->menu );

	// Get the nav menu based on the theme_location
	if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) )
		$menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );

	// get the first menu that has items if we still can't find a menu
	if ( ! $menu && !$args->theme_location ) {
		$menus = wp_get_nav_menus( array( 'orderby' => 'name' ) );
		foreach ( $menus as $menu_maybe ) {
			if ( $menu_items = wp_get_nav_menu_items( $menu_maybe->term_id, array( 'update_post_term_cache' => false ) ) ) {
				$menu = $menu_maybe;
				break;
			}
		}
	}

	// If the menu exists, get its items.
	if ( $menu && ! is_wp_error($menu) && !isset($menu_items) )
		$menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );

	/*
	 * If no menu was found:
	 *  - Fall back (if one was specified), or bail.
	 *
	 * If no menu items were found:
	 *  - Fall back, but only if no theme location was specified.
	 *  - Otherwise, bail.
	 */
	if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) && !$args->theme_location ) )
		&& $args->fallback_cb && is_callable( $args->fallback_cb ) )
			return call_user_func( $args->fallback_cb, (array) $args );

	if ( ! $menu || is_wp_error( $menu ) )
		return false;

	$nav_menu = $items = '';

	$show_container = false;
	if ( $args->container ) {
		/**
		 * Filter the list of HTML tags that are valid for use as menu containers.
		 *
		 * @since 3.0.0
		 *
		 * @param array $tags The acceptable HTML tags for use as menu containers.
		 *                    Default is array containing 'div' and 'nav'.
		 */
		$allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
		if ( in_array( $args->container, $allowed_tags ) ) {
			$show_container = true;
			$class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"';
			$id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';
			$nav_menu .= '<'. $args->container . $id . $class . '>';
		}
	}

	// Set up the $menu_item variables
	_wp_menu_item_classes_by_context( $menu_items );

	$sorted_menu_items = $menu_items_with_children = array();
	foreach ( (array) $menu_items as $menu_item ) {
		$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
		if ( $menu_item->menu_item_parent )
			$menu_items_with_children[ $menu_item->menu_item_parent ] = true;
	}

	// Add the menu-item-has-children class where applicable
	if ( $menu_items_with_children ) {
		foreach ( $sorted_menu_items as &$menu_item ) {
			if ( isset( $menu_items_with_children[ $menu_item->ID ] ) )
				$menu_item->classes[] = 'menu-item-has-children';
		}
	}

	unset( $menu_items, $menu_item );

	/**
	 * Filter the sorted list of menu item objects before generating the menu's HTML.
	 *
	 * @since 3.1.0
	 *
	 * @param array  $sorted_menu_items The menu items, sorted by each menu item's menu order.
	 * @param object $args              An object containing wp_nav_menu() arguments.
	 */
	$sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args );

	$items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );
	unset($sorted_menu_items);

	// Attributes
	if ( ! empty( $args->menu_id ) ) {
		$wrap_id = $args->menu_id;
	} else {
		$wrap_id = 'menu-' . $menu->slug;
		while ( in_array( $wrap_id, $menu_id_slugs ) ) {
			if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) )
				$wrap_id = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $wrap_id );
			else
				$wrap_id = $wrap_id . '-1';
		}
	}
	$menu_id_slugs[] = $wrap_id;

	$wrap_class = $args->menu_class ? $args->menu_class : '';

	/**
	 * Filter the HTML list content for navigation menus.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string $items The HTML list content for the menu items.
	 * @param object $args  An object containing wp_nav_menu() arguments.
	 */
	$items = apply_filters( 'wp_nav_menu_items', $items, $args );
	/**
	 * Filter the HTML list content for a specific navigation menu.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string $items The HTML list content for the menu items.
	 * @param object $args  An object containing wp_nav_menu() arguments.
	 */
	$items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );

	// Don't print any markup if there are no items at this point.
	if ( empty( $items ) )
		return false;

	$nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items );
	unset( $items );

	if ( $show_container )
		$nav_menu .= '</' . $args->container . '>';

	/**
	 * Filter the HTML content for navigation menus.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_nav_menu()
	 *
	 * @param string $nav_menu The HTML content for the navigation menu.
	 * @param object $args     An object containing wp_nav_menu() arguments.
	 */
	$nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );

	if ( $args->echo )
		echo $nav_menu;
	else
		return $nav_menu;
}

/**
 * Add the class property classes for the current context, if applicable.
 *
 * @access private
 * @since 3.0.0
 *
 * @param array $menu_items The current menu item objects to which to add the class property information.
 */
function _wp_menu_item_classes_by_context( &$menu_items ) {
	global $wp_query, $wp_rewrite;

	$queried_object = $wp_query->get_queried_object();
	$queried_object_id = (int) $wp_query->queried_object_id;

	$active_object = '';
	$active_ancestor_item_ids = array();
	$active_parent_item_ids = array();
	$active_parent_object_ids = array();
	$possible_taxonomy_ancestors = array();
	$possible_object_parents = array();
	$home_page_id = (int) get_option( 'page_for_posts' );

	if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) {
		foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) {
			if ( is_taxonomy_hierarchical( $taxonomy ) ) {
				$term_hierarchy = _get_term_hierarchy( $taxonomy );
				$terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) );
				if ( is_array( $terms ) ) {
					$possible_object_parents = array_merge( $possible_object_parents, $terms );
					$term_to_ancestor = array();
					foreach ( (array) $term_hierarchy as $anc => $descs ) {
						foreach ( (array) $descs as $desc )
							$term_to_ancestor[ $desc ] = $anc;
					}

					foreach ( $terms as $desc ) {
						do {
							$possible_taxonomy_ancestors[ $taxonomy ][] = $desc;
							if ( isset( $term_to_ancestor[ $desc ] ) ) {
								$_desc = $term_to_ancestor[ $desc ];
								unset( $term_to_ancestor[ $desc ] );
								$desc = $_desc;
							} else {
								$desc = 0;
							}
						} while ( ! empty( $desc ) );
					}
				}
			}
		}
	} elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) {
		$term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy );
		$term_to_ancestor = array();
		foreach ( (array) $term_hierarchy as $anc => $descs ) {
			foreach ( (array) $descs as $desc )
				$term_to_ancestor[ $desc ] = $anc;
		}
		$desc = $queried_object->term_id;
		do {
			$possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc;
			if ( isset( $term_to_ancestor[ $desc ] ) ) {
				$_desc = $term_to_ancestor[ $desc ];
				unset( $term_to_ancestor[ $desc ] );
				$desc = $_desc;
			} else {
				$desc = 0;
			}
		} while ( ! empty( $desc ) );
	}

	$possible_object_parents = array_filter( $possible_object_parents );

	$front_page_url = home_url();

	foreach ( (array) $menu_items as $key => $menu_item ) {

		$menu_items[$key]->current = false;

		$classes = (array) $menu_item->classes;
		$classes[] = 'menu-item';
		$classes[] = 'menu-item-type-' . $menu_item->type;
		$classes[] = 'menu-item-object-' . $menu_item->object;

		// if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object
		if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) {
			$active_parent_object_ids[] = (int) $menu_item->object_id;
			$active_parent_item_ids[] = (int) $menu_item->db_id;
			$active_object = $queried_object->post_type;

		// if the menu item corresponds to the currently-queried post or taxonomy object
		} elseif (
			$menu_item->object_id == $queried_object_id &&
			(
				( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) ||
				( 'post_type' == $menu_item->type && $wp_query->is_singular ) ||
				( 'taxonomy' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) && $queried_object->taxonomy == $menu_item->object )
			)
		) {
			$classes[] = 'current-menu-item';
			$menu_items[$key]->current = true;
			$_anc_id = (int) $menu_item->db_id;

			while(
				( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&
				! in_array( $_anc_id, $active_ancestor_item_ids )
			) {
				$active_ancestor_item_ids[] = $_anc_id;
			}

			if ( 'post_type' == $menu_item->type && 'page' == $menu_item->object ) {
				// Back compat classes for pages to match wp_page_menu()
				$classes[] = 'page_item';
				$classes[] = 'page-item-' . $menu_item->object_id;
				$classes[] = 'current_page_item';
			}
			$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
			$active_parent_object_ids[] = (int) $menu_item->post_parent;
			$active_object = $menu_item->object;

		// if the menu item corresponds to the currently-requested URL
		} elseif ( 'custom' == $menu_item->object ) {
			$_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] );
			$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_root_relative_current );
			$raw_item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;
			$item_url = untrailingslashit( $raw_item_url );
			$_indexless_current = untrailingslashit( preg_replace( '/' . preg_quote( $wp_rewrite->index, '/' ) . '$/', '', $current_url ) );

			if ( $raw_item_url && in_array( $item_url, array( $current_url, $_indexless_current, $_root_relative_current ) ) ) {
				$classes[] = 'current-menu-item';
				$menu_items[$key]->current = true;
				$_anc_id = (int) $menu_item->db_id;

				while(
					( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&
					! in_array( $_anc_id, $active_ancestor_item_ids )
				) {
					$active_ancestor_item_ids[] = $_anc_id;
				}

				if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ) ) ) {
					// Back compat for home link to match wp_page_menu()
					$classes[] = 'current_page_item';
				}
				$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
				$active_parent_object_ids[] = (int) $menu_item->post_parent;
				$active_object = $menu_item->object;

			// give front page item current-menu-item class when extra query arguments involved
			} elseif ( $item_url == $front_page_url && is_front_page() ) {
				$classes[] = 'current-menu-item';
			}

			if ( untrailingslashit($item_url) == home_url() )
				$classes[] = 'menu-item-home';
		}

		// back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query
		if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id )
			$classes[] = 'current_page_parent';

		$menu_items[$key]->classes = array_unique( $classes );
	}
	$active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) );
	$active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) );
	$active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) );

	// set parent's class
	foreach ( (array) $menu_items as $key => $parent_item ) {
		$classes = (array) $parent_item->classes;
		$menu_items[$key]->current_item_ancestor = false;
		$menu_items[$key]->current_item_parent = false;

		if (
			isset( $parent_item->type ) &&
			(
				// ancestral post object
				(
					'post_type' == $parent_item->type &&
					! empty( $queried_object->post_type ) &&
					is_post_type_hierarchical( $queried_object->post_type ) &&
					in_array( $parent_item->object_id, $queried_object->ancestors ) &&
					$parent_item->object != $queried_object->ID
				) ||

				// ancestral term
				(
					'taxonomy' == $parent_item->type &&
					isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
					in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
					(
						! isset( $queried_object->term_id ) ||
						$parent_item->object_id != $queried_object->term_id
					)
				)
			)
		) {
			$classes[] = empty( $queried_object->taxonomy ) ? 'current-' . $queried_object->post_type . '-ancestor' : 'current-' . $queried_object->taxonomy . '-ancestor';
		}

		if ( in_array(  intval( $parent_item->db_id ), $active_ancestor_item_ids ) ) {
			$classes[] = 'current-menu-ancestor';
			$menu_items[$key]->current_item_ancestor = true;
		}
		if ( in_array( $parent_item->db_id, $active_parent_item_ids ) ) {
			$classes[] = 'current-menu-parent';
			$menu_items[$key]->current_item_parent = true;
		}
		if ( in_array( $parent_item->object_id, $active_parent_object_ids ) )
			$classes[] = 'current-' . $active_object . '-parent';

		if ( 'post_type' == $parent_item->type && 'page' == $parent_item->object ) {
			// Back compat classes for pages to match wp_page_menu()
			if ( in_array('current-menu-parent', $classes) )
				$classes[] = 'current_page_parent';
			if ( in_array('current-menu-ancestor', $classes) )
				$classes[] = 'current_page_ancestor';
		}

		$menu_items[$key]->classes = array_unique( $classes );
	}
}

/**
 * Retrieve the HTML list content for nav menu items.
 *
 * @uses Walker_Nav_Menu to create HTML list content.
 * @since 3.0.0
 * @see Walker::walk() for parameters and return description.
 */
function walk_nav_menu_tree( $items, $depth, $r ) {
	$walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker;
	$args = array( $items, $depth, $r );

	return call_user_func_array( array($walker, 'walk'), $args );
}

/**
 * Prevents a menu item ID from being used more than once.
 *
 * @since 3.0.1
 * @access private
 */
function _nav_menu_item_id_use_once( $id, $item ) {
	static $_used_ids = array();
	if ( in_array( $item->ID, $_used_ids ) )
		return '';
	$_used_ids[] = $item->ID;
	return $id;
}
add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 );

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<?php

/**

* Navigation Menu template functions

* @package WordPress

* @subpackage Nav_Menus

* @since 3.0.0

/**

* Create HTML list of nav menu items.

* @since 3.0.0

* @uses Walker

class Walker_Nav_Menu extends Walker {

/**

* What the class handles.

* @see Walker::$tree_type

* @since 3.0.0

* @var string

public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

/**

* Database fields to use.

* @see Walker::$db_fields

* @since 3.0.0

* @todo Decouple this.

* @var array

public $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );

/**

* Starts the list before the elements are added.

* @see Walker::start_lvl()

* @since 3.0.0

* @param string $output Passed by reference. Used to append additional content.

* @param int $depth Depth of menu item. Used for padding.

* @param array $args An array of arguments. @see wp_nav_menu()

public function start_lvl( &$output, $depth = 0, $args = array() ) {

$indent = str_repeat("\t", $depth);

$output .= "\n$indent<ul class=\"sub-menu\">\n";

}

/**

* Ends the list of after the elements are added.

* @see Walker::end_lvl()

* @since 3.0.0

* @param string $output Passed by reference. Used to append additional content.

* @param int $depth Depth of menu item. Used for padding.

* @param array $args An array of arguments. @see wp_nav_menu()

public function end_lvl( &$output, $depth = 0, $args = array() ) {

$indent = str_repeat("\t", $depth);

$output .= "$indent</ul>\n";

}

/**

* Start the element output.

* @see Walker::start_el()

* @since 3.0.0

* @param string $output Passed by reference. Used to append additional content.

* @param object $item Menu item data object.

* @param int $depth Depth of menu item. Used for padding.

* @param array $args An array of arguments. @see wp_nav_menu()

* @param int $id Current item ID.

public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

$classes = empty( $item->classes ) ? array() : (array) $item->classes;

$classes[] = 'menu-item-' . $item->ID;

/**

* Filter the CSS class(es) applied to a menu item's <li>.

* @since 3.0.0

* @see wp_nav_menu()

* @param array $classes The CSS classes that are applied to the menu item's <li>.

* @param object $item The current menu item.

* @param array $args An array of wp_nav_menu() arguments.

$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );

$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

/**

* Filter the ID applied to a menu item's <li>.

* @since 3.0.1

* @see wp_nav_menu()

* @param string $menu_id The ID that is applied to the menu item's <li>.

* @param object $item The current menu item.

* @param array $args An array of wp_nav_menu() arguments.

$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );

$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

$output .= $indent . '<li' . $id . $class_names .'>';

$atts = array();

$atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : '';

$atts['target'] = ! empty( $item->target ) ? $item->target : '';

$atts['rel'] = ! empty( $item->xfn ) ? $item->xfn : '';

$atts['href'] = ! empty( $item->url ) ? $item->url : '';

/**

* Filter the HTML attributes applied to a menu item's <a>.

* @since 3.6.0

* @see wp_nav_menu()

* @param array $atts {

* The HTML attributes applied to the menu item's <a>, empty strings are ignored.

* @type string $title Title attribute.

* @type string $target Target attribute.

* @type string $rel The rel attribute.

* @type string $href The href attribute.

* }

* @param object $item The current menu item.

* @param array $args An array of wp_nav_menu() arguments.

$atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args );

$attributes = '';

foreach ( $atts as $attr => $value ) {

if ( ! empty( $value ) ) {

$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );

$attributes .= ' ' . $attr . '="' . $value . '"';

}

$item_output = $args->before;

$item_output .= '<a'. $attributes .'>';

/** This filter is documented in wp-includes/post-template.php */

$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;

$item_output .= '</a>';

$item_output .= $args->after;

/**

* Filter a menu item's starting output.

* The menu item's starting output only includes $args->before, the opening <a>,

* the menu item's title, the closing </a>, and $args->after. Currently, there is

* no filter for modifying the opening and closing <li> for a menu item.

* @since 3.0.0

* @see wp_nav_menu()

* @param string $item_output The menu item's starting HTML output.

* @param object $item Menu item data object.

* @param int $depth Depth of menu item. Used for padding.

* @param array $args An array of wp_nav_menu() arguments.

$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );

}

/**

* Ends the element output, if needed.

* @see Walker::end_el()

* @since 3.0.0

* @param string $output Passed by reference. Used to append additional content.

* @param object $item Page data object. Not used.

* @param int $depth Depth of page. Not Used.

* @param array $args An array of arguments. @see wp_nav_menu()

public function end_el( &$output, $item, $depth = 0, $args = array() ) {

$output .= "</li>\n";

}

} // Walker_Nav_Menu

/**

* Displays a navigation menu.

* @since 3.0.0

* @param array $args {

* Optional. Array of nav menu arguments.

* @type string $menu Desired menu. Accepts (matching in order) id, slug, name. Default empty.

* @type string $menu_class CSS class to use for the ul element which forms the menu. Default 'menu'.

* @type string $menu_id The ID that is applied to the ul element which forms the menu.

* Default is the menu slug, incremented.

* @type string $container Whether to wrap the ul, and what to wrap it with. Default 'div'.

* @type string $container_class Class that is applied to the container. Default 'menu-{menu slug}-container'.

* @type string $container_id The ID that is applied to the container. Default empty.

* @type callback|bool $fallback_cb If the menu doesn't exists, a callback function will fire.

* Default is 'wp_page_menu'. Set to false for no fallback.

* @type string $before Text before the link text. Default empty.

* @type string $after Text after the link text. Default empty.

* @type string $link_before Text before the link. Default empty.

* @type string $link_after Text after the link. Default empty.

* @type bool $echo Whether to echo the menu or return it. Default true.

* @type int $depth How many levels of the hierarchy are to be included. 0 means all. Default 0.

* @type object $walker Instance of a custom walker class. Default empty.

* @type string $theme_location Theme location to be used. Must be registered with register_nav_menu()

* in order to be selectable by the user.

* @type string $items_wrap How the list items should be wrapped. Default is a ul with an id and class.

* Uses printf() format with numbered placeholders.

* }

* @return mixed Menu output if $echo is false, false if there are no items or no menu was found.

function wp_nav_menu( $args = array() ) {

static $menu_id_slugs = array();

$defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '',

'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '', 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',

'depth' => 0, 'walker' => '', 'theme_location' => '' );

$args = wp_parse_args( $args, $defaults );

/**

* Filter the arguments used to display a navigation menu.

* @since 3.0.0

* @see wp_nav_menu()

* @param array $args Array of wp_nav_menu() arguments.

$args = apply_filters( 'wp_nav_menu_args', $args );

$args = (object) $args;

/**

* Filter whether to short-circuit the wp_nav_menu() output.

* Returning a non-null value to the filter will short-circuit

* wp_nav_menu(), echoing that value if $args->echo is true,

* returning that value otherwise.

* @since 3.9.0

* @see wp_nav_menu()

* @param string|null $output Nav menu output to short-circuit with. Default null.

* @param object $args An object containing wp_nav_menu() arguments.

$nav_menu = apply_filters( 'pre_wp_nav_menu', null, $args );

if ( null !== $nav_menu ) {

if ( $args->echo ) {

echo $nav_menu;

return;

}

return $nav_menu;

}

// Get the nav menu based on the requested menu

$menu = wp_get_nav_menu_object( $args->menu );

// Get the nav menu based on the theme_location

if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) )

$menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );

// get the first menu that has items if we still can't find a menu

if ( ! $menu && !$args->theme_location ) {

$menus = wp_get_nav_menus( array( 'orderby' => 'name' ) );

foreach ( $menus as $menu_maybe ) {

if ( $menu_items = wp_get_nav_menu_items( $menu_maybe->term_id, array( 'update_post_term_cache' => false ) ) ) {

$menu = $menu_maybe;

break;

}

// If the menu exists, get its items.

if ( $menu && ! is_wp_error($menu) && !isset($menu_items) )

$menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );

* If no menu was found:

* - Fall back (if one was specified), or bail.

* If no menu items were found:

* - Fall back, but only if no theme location was specified.

* - Otherwise, bail.

if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) && !$args->theme_location ) )

&& $args->fallback_cb && is_callable( $args->fallback_cb ) )

return call_user_func( $args->fallback_cb, (array) $args );

if ( ! $menu || is_wp_error( $menu ) )

return false;

$nav_menu = $items = '';

$show_container = false;

if ( $args->container ) {

/**

* Filter the list of HTML tags that are valid for use as menu containers.

* @since 3.0.0

* @param array $tags The acceptable HTML tags for use as menu containers.

* Default is array containing 'div' and 'nav'.

$allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );

if ( in_array( $args->container, $allowed_tags ) ) {

$show_container = true;

$class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"';

$id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';

$nav_menu .= '<'. $args->container . $id . $class . '>';

}

// Set up the $menu_item variables

_wp_menu_item_classes_by_context( $menu_items );

$sorted_menu_items = $menu_items_with_children = array();

foreach ( (array) $menu_items as $menu_item ) {

$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;

if ( $menu_item->menu_item_parent )

$menu_items_with_children[ $menu_item->menu_item_parent ] = true;

}

// Add the menu-item-has-children class where applicable

if ( $menu_items_with_children ) {

foreach ( $sorted_menu_items as &$menu_item ) {

if ( isset( $menu_items_with_children[ $menu_item->ID ] ) )

$menu_item->classes[] = 'menu-item-has-children';

}

unset( $menu_items, $menu_item );

/**

* Filter the sorted list of menu item objects before generating the menu's HTML.

* @since 3.1.0

* @param array $sorted_menu_items The menu items, sorted by each menu item's menu order.

* @param object $args An object containing wp_nav_menu() arguments.

$sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args );

$items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );

unset($sorted_menu_items);

// Attributes

if ( ! empty( $args->menu_id ) ) {

$wrap_id = $args->menu_id;

} else {

$wrap_id = 'menu-' . $menu->slug;

while ( in_array( $wrap_id, $menu_id_slugs ) ) {

if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) )

$wrap_id = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $wrap_id );

else

$wrap_id = $wrap_id . '-1';

}

$menu_id_slugs[] = $wrap_id;

$wrap_class = $args->menu_class ? $args->menu_class : '';

/**

* Filter the HTML list content for navigation menus.

* @since 3.0.0

* @see wp_nav_menu()

* @param string $items The HTML list content for the menu items.

* @param object $args An object containing wp_nav_menu() arguments.

$items = apply_filters( 'wp_nav_menu_items', $items, $args );

/**

* Filter the HTML list content for a specific navigation menu.

* @since 3.0.0

* @see wp_nav_menu()

* @param string $items The HTML list content for the menu items.

* @param object $args An object containing wp_nav_menu() arguments.

$items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );

// Don't print any markup if there are no items at this point.

if ( empty( $items ) )

return false;

$nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items );

unset( $items );

if ( $show_container )

$nav_menu .= '</' . $args->container . '>';

/**

* Filter the HTML content for navigation menus.

* @since 3.0.0

* @see wp_nav_menu()

* @param string $nav_menu The HTML content for the navigation menu.

* @param object $args An object containing wp_nav_menu() arguments.

$nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );

if ( $args->echo )

echo $nav_menu;

else

return $nav_menu;

}

/**

* Add the class property classes for the current context, if applicable.

* @access private

* @since 3.0.0

* @param array $menu_items The current menu item objects to which to add the class property information.

function _wp_menu_item_classes_by_context( &$menu_items ) {

global $wp_query, $wp_rewrite;

$queried_object = $wp_query->get_queried_object();

$queried_object_id = (int) $wp_query->queried_object_id;

$active_object = '';

$active_ancestor_item_ids = array();

$active_parent_item_ids = array();

$active_parent_object_ids = array();

$possible_taxonomy_ancestors = array();

$possible_object_parents = array();

$home_page_id = (int) get_option( 'page_for_posts' );

if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) {

foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) {

if ( is_taxonomy_hierarchical( $taxonomy ) ) {

$term_hierarchy = _get_term_hierarchy( $taxonomy );

$terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) );

if ( is_array( $terms ) ) {

$possible_object_parents = array_merge( $possible_object_parents, $terms );

$term_to_ancestor = array();

foreach ( (array) $term_hierarchy as $anc => $descs ) {

foreach ( (array) $descs as $desc )

$term_to_ancestor[ $desc ] = $anc;

}

foreach ( $terms as $desc ) {

do {

$possible_taxonomy_ancestors[ $taxonomy ][] = $desc;

if ( isset( $term_to_ancestor[ $desc ] ) ) {

$_desc = $term_to_ancestor[ $desc ];

unset( $term_to_ancestor[ $desc ] );

$desc = $_desc;

} else {

$desc = 0;

}

} while ( ! empty( $desc ) );

}

} elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) {

$term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy );

$term_to_ancestor = array();

foreach ( (array) $term_hierarchy as $anc => $descs ) {

foreach ( (array) $descs as $desc )

$term_to_ancestor[ $desc ] = $anc;

}

$desc = $queried_object->term_id;

do {

$possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc;

if ( isset( $term_to_ancestor[ $desc ] ) ) {

$_desc = $term_to_ancestor[ $desc ];

unset( $term_to_ancestor[ $desc ] );

$desc = $_desc;

} else {

$desc = 0;

}

} while ( ! empty( $desc ) );

}

$possible_object_parents = array_filter( $possible_object_parents );

$front_page_url = home_url();

foreach ( (array) $menu_items as $key => $menu_item ) {

$menu_items[$key]->current = false;

$classes = (array) $menu_item->classes;

$classes[] = 'menu-item';

$classes[] = 'menu-item-type-' . $menu_item->type;

$classes[] = 'menu-item-object-' . $menu_item->object;

// if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object

if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) {

$active_parent_object_ids[] = (int) $menu_item->object_id;

$active_parent_item_ids[] = (int) $menu_item->db_id;

$active_object = $queried_object->post_type;

// if the menu item corresponds to the currently-queried post or taxonomy object

} elseif (

$menu_item->object_id == $queried_object_id &&

(

( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) ||

( 'post_type' == $menu_item->type && $wp_query->is_singular ) ||

( 'taxonomy' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) && $queried_object->taxonomy == $menu_item->object )

)

) {

$classes[] = 'current-menu-item';

$menu_items[$key]->current = true;

$_anc_id = (int) $menu_item->db_id;

while(

( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&

! in_array( $_anc_id, $active_ancestor_item_ids )

) {

$active_ancestor_item_ids[] = $_anc_id;

}

if ( 'post_type' == $menu_item->type && 'page' == $menu_item->object ) {

// Back compat classes for pages to match wp_page_menu()

$classes[] = 'page_item';

$classes[] = 'page-item-' . $menu_item->object_id;

$classes[] = 'current_page_item';

}

$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;

$active_parent_object_ids[] = (int) $menu_item->post_parent;

$active_object = $menu_item->object;

// if the menu item corresponds to the currently-requested URL

} elseif ( 'custom' == $menu_item->object ) {

$_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] );

$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_root_relative_current );

$raw_item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;

$item_url = untrailingslashit( $raw_item_url );

$_indexless_current = untrailingslashit( preg_replace( '/' . preg_quote( $wp_rewrite->index, '/' ) . '$/', '', $current_url ) );

if ( $raw_item_url && in_array( $item_url, array( $current_url, $_indexless_current, $_root_relative_current ) ) ) {

$classes[] = 'current-menu-item';

$menu_items[$key]->current = true;

$_anc_id = (int) $menu_item->db_id;

while(

( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&

! in_array( $_anc_id, $active_ancestor_item_ids )

) {

$active_ancestor_item_ids[] = $_anc_id;

}

if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ) ) ) {

// Back compat for home link to match wp_page_menu()

$classes[] = 'current_page_item';

}

$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;

$active_parent_object_ids[] = (int) $menu_item->post_parent;

$active_object = $menu_item->object;

// give front page item current-menu-item class when extra query arguments involved

} elseif ( $item_url == $front_page_url && is_front_page() ) {

$classes[] = 'current-menu-item';

}

if ( untrailingslashit($item_url) == home_url() )

$classes[] = 'menu-item-home';

}

// back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query

if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id )

$classes[] = 'current_page_parent';

$menu_items[$key]->classes = array_unique( $classes );

}

$active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) );

$active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) );

$active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) );

// set parent's class

foreach ( (array) $menu_items as $key => $parent_item ) {

$classes = (array) $parent_item->classes;

$menu_items[$key]->current_item_ancestor = false;

$menu_items[$key]->current_item_parent = false;

if (

isset( $parent_item->type ) &&

(

// ancestral post object

(

'post_type' == $parent_item->type &&

! empty( $queried_object->post_type ) &&

is_post_type_hierarchical( $queried_object->post_type ) &&

in_array( $parent_item->object_id, $queried_object->ancestors ) &&

$parent_item->object != $queried_object->ID

) ||

// ancestral term

(

'taxonomy' == $parent_item->type &&

isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) &&

in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] ) &&

(

! isset( $queried_object->term_id ) ||

$parent_item->object_id != $queried_object->term_id

)

) {

$classes[] = empty( $queried_object->taxonomy ) ? 'current-' . $queried_object->post_type . '-ancestor' : 'current-' . $queried_object->taxonomy . '-ancestor';

}

if ( in_array( intval( $parent_item->db_id ), $active_ancestor_item_ids ) ) {

$classes[] = 'current-menu-ancestor';

$menu_items[$key]->current_item_ancestor = true;

}

if ( in_array( $parent_item->db_id, $active_parent_item_ids ) ) {

$classes[] = 'current-menu-parent';

$menu_items[$key]->current_item_parent = true;

}

if ( in_array( $parent_item->object_id, $active_parent_object_ids ) )

$classes[] = 'current-' . $active_object . '-parent';

if ( 'post_type' == $parent_item->type && 'page' == $parent_item->object ) {

// Back compat classes for pages to match wp_page_menu()

if ( in_array('current-menu-parent', $classes) )

$classes[] = 'current_page_parent';

if ( in_array('current-menu-ancestor', $classes) )

$classes[] = 'current_page_ancestor';

}

$menu_items[$key]->classes = array_unique( $classes );

}

/**

* Retrieve the HTML list content for nav menu items.

* @uses Walker_Nav_Menu to create HTML list content.

* @since 3.0.0

* @see Walker::walk() for parameters and return description.

function walk_nav_menu_tree( $items, $depth, $r ) {

$walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker;

$args = array( $items, $depth, $r );

return call_user_func_array( array($walker, 'walk'), $args );

}

/**

* Prevents a menu item ID from being used more than once.

* @since 3.0.1

* @access private

function _nav_menu_item_id_use_once( $id, $item ) {

static $_used_ids = array();

if ( in_array( $item->ID, $_used_ids ) )

return '';

$_used_ids[] = $item->ID;

return $id;

}

add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 );

WordPressを読む　69 /blog/wp-includes/nav-menu.php

2014/12/04 Wordpress

<?php
/**
 * Navigation Menu functions
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 3.0.0
 */

/**
 * Returns a navigation menu object.
 *
 * @since 3.0.0
 *
 * @uses get_term
 * @uses get_term_by
 *
 * @param string $menu Menu ID, slug, or name.
 * @return mixed false if $menu param isn't supplied or term does not exist, menu object if successful.
 */
function wp_get_nav_menu_object( $menu ) {
	if ( ! $menu )
		return false;

	$menu_obj = get_term( $menu, 'nav_menu' );

	if ( ! $menu_obj )
		$menu_obj = get_term_by( 'slug', $menu, 'nav_menu' );

	if ( ! $menu_obj )
		$menu_obj = get_term_by( 'name', $menu, 'nav_menu' );

	if ( ! $menu_obj )
		$menu_obj = false;

	return $menu_obj;
}

/**
 * Check if the given ID is a navigation menu.
 *
 * Returns true if it is; false otherwise.
 *
 * @since 3.0.0
 *
 * @param int|string $menu The menu to check (ID, slug, or name).
 * @return bool Whether the menu exists.
 */
function is_nav_menu( $menu ) {
	if ( ! $menu )
		return false;

	$menu_obj = wp_get_nav_menu_object( $menu );

	if (
		$menu_obj &&
		! is_wp_error( $menu_obj ) &&
		! empty( $menu_obj->taxonomy ) &&
		'nav_menu' == $menu_obj->taxonomy
	)
		return true;

	return false;
}

/**
 * Register navigation menus for a theme.
 *
 * @since 3.0.0
 *
 * @param array $locations Associative array of menu location identifiers (like a slug) and descriptive text.
 */
function register_nav_menus( $locations = array() ) {
	global $_wp_registered_nav_menus;

	add_theme_support( 'menus' );

	$_wp_registered_nav_menus = array_merge( (array) $_wp_registered_nav_menus, $locations );
}

/**
 * Unregisters a navigation menu for a theme.
 *
 * @param array $location the menu location identifier
 *
 * @return bool True on success, false on failure.
 */
function unregister_nav_menu( $location ) {
	global $_wp_registered_nav_menus;

	if ( is_array( $_wp_registered_nav_menus ) && isset( $_wp_registered_nav_menus[$location] ) ) {
		unset( $_wp_registered_nav_menus[$location] );
		if ( empty( $_wp_registered_nav_menus ) ) {
			_remove_theme_support( 'menus' );
		}
		return true;
	}
	return false;
}

/**
 * Register a navigation menu for a theme.
 *
 * @since 3.0.0
 *
 * @param string $location Menu location identifier, like a slug.
 * @param string $description Menu location descriptive text.
 */
function register_nav_menu( $location, $description ) {
	register_nav_menus( array( $location => $description ) );
}
/**
 * Returns an array of all registered navigation menus in a theme
 *
 * @since 3.0.0
 * @return array
 */
function get_registered_nav_menus() {
	global $_wp_registered_nav_menus;
	if ( isset( $_wp_registered_nav_menus ) )
		return $_wp_registered_nav_menus;
	return array();
}

/**
 * Returns an array with the registered navigation menu locations and the menu assigned to it
 *
 * @since 3.0.0
 * @return array
 */

function get_nav_menu_locations() {
	$locations = get_theme_mod( 'nav_menu_locations' );
	return ( is_array( $locations ) ) ? $locations : array();
}

/**
 * Whether a registered nav menu location has a menu assigned to it.
 *
 * @since 3.0.0
 * @param string $location Menu location identifier.
 * @return bool Whether location has a menu.
 */
function has_nav_menu( $location ) {
	global $_wp_registered_nav_menus;

	if ( ! isset( $_wp_registered_nav_menus[ $location ] ) ) {
		return false;
	}

	$locations = get_nav_menu_locations();
	return ( ! empty( $locations[ $location ] ) );
}

/**
 * Determine whether the given ID is a nav menu item.
 *
 * @since 3.0.0
 *
 * @param int $menu_item_id The ID of the potential nav menu item.
 * @return bool Whether the given ID is that of a nav menu item.
 */
function is_nav_menu_item( $menu_item_id = 0 ) {
	return ( ! is_wp_error( $menu_item_id ) && ( 'nav_menu_item' == get_post_type( $menu_item_id ) ) );
}

/**
 * Create a Navigation Menu.
 *
 * @since 3.0.0
 *
 * @param string $menu_name Menu name.
 * @return int|WP_Error Menu ID on success, WP_Error object on failure.
 */
function wp_create_nav_menu( $menu_name ) {
	return wp_update_nav_menu_object( 0, array( 'menu-name' => $menu_name ) );
}

/**
 * Delete a Navigation Menu.
 *
 * @since 3.0.0
 *
 * @param string $menu Menu ID, slug, or name.
 * @return bool|WP_Error True on success, false or WP_Error object on failure.
 */
function wp_delete_nav_menu( $menu ) {
	$menu = wp_get_nav_menu_object( $menu );
	if ( ! $menu )
		return false;

	$menu_objects = get_objects_in_term( $menu->term_id, 'nav_menu' );
	if ( ! empty( $menu_objects ) ) {
		foreach ( $menu_objects as $item ) {
			wp_delete_post( $item );
		}
	}

	$result = wp_delete_term( $menu->term_id, 'nav_menu' );

	// Remove this menu from any locations.
	$locations = get_nav_menu_locations();
	foreach ( $locations as $location => $menu_id ) {
		if ( $menu_id == $menu->term_id )
			$locations[ $location ] = 0;
	}
	set_theme_mod( 'nav_menu_locations', $locations );

	if ( $result && !is_wp_error($result) )

		/**
		 * Fires after a navigation menu has been successfully deleted.
		 *
		 * @since 3.0.0
		 *
		 * @param int $term_id ID of the deleted menu.
		 */
		do_action( 'wp_delete_nav_menu', $menu->term_id );

	return $result;
}

/**
 * Save the properties of a menu or create a new menu with those properties.
 *
 * @since 3.0.0
 *
 * @param int $menu_id The ID of the menu or "0" to create a new menu.
 * @param array $menu_data The array of menu data.
 * @return int|WP_Error Menu ID on success, WP_Error object on failure.
 */
function wp_update_nav_menu_object( $menu_id = 0, $menu_data = array() ) {
	$menu_id = (int) $menu_id;

	$_menu = wp_get_nav_menu_object( $menu_id );

	$args = array(
		'description' => ( isset( $menu_data['description'] ) ? $menu_data['description']  : '' ),
		'name'        => ( isset( $menu_data['menu-name']   ) ? $menu_data['menu-name']    : '' ),
		'parent'      => ( isset( $menu_data['parent']      ) ? (int) $menu_data['parent'] : 0  ),
		'slug'        => null,
	);

	// double-check that we're not going to have one menu take the name of another
	$_possible_existing = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );
	if (
		$_possible_existing &&
		! is_wp_error( $_possible_existing ) &&
		isset( $_possible_existing->term_id ) &&
		$_possible_existing->term_id != $menu_id
	)
		return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );

	// menu doesn't already exist, so create a new menu
	if ( ! $_menu || is_wp_error( $_menu ) ) {
		$menu_exists = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );

		if ( $menu_exists )
			return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );

		$_menu = wp_insert_term( $menu_data['menu-name'], 'nav_menu', $args );

		if ( is_wp_error( $_menu ) )
			return $_menu;

		/**
		 * Fires after a navigation menu is successfully created.
		 *
		 * @since 3.0.0
		 *
		 * @param int   $term_id   ID of the new menu.
		 * @param array $menu_data An array of menu data.
		 */
		do_action( 'wp_create_nav_menu', $_menu['term_id'], $menu_data );

		return (int) $_menu['term_id'];
	}

	if ( ! $_menu || ! isset( $_menu->term_id ) )
		return 0;

	$menu_id = (int) $_menu->term_id;

	$update_response = wp_update_term( $menu_id, 'nav_menu', $args );

	if ( is_wp_error( $update_response ) )
		return $update_response;

	/**
	 * Fires after a navigation menu has been successfully updated.
	 *
	 * @since 3.0.0
	 *
	 * @param int   $menu_id   ID of the updated menu.
	 * @param array $menu_data An array of menu data.
	 */
	do_action( 'wp_update_nav_menu', $menu_id, $menu_data );
	return $menu_id;
}

/**
 * Save the properties of a menu item or create a new one.
 *
 * @since 3.0.0
 *
 * @param int $menu_id The ID of the menu. Required. If "0", makes the menu item a draft orphan.
 * @param int $menu_item_db_id The ID of the menu item. If "0", creates a new menu item.
 * @param array $menu_item_data The menu item's data.
 * @return int|WP_Error The menu item's database ID or WP_Error object on failure.
 */
function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item_data = array() ) {
	$menu_id = (int) $menu_id;
	$menu_item_db_id = (int) $menu_item_db_id;

	// make sure that we don't convert non-nav_menu_item objects into nav_menu_item objects
	if ( ! empty( $menu_item_db_id ) && ! is_nav_menu_item( $menu_item_db_id ) )
		return new WP_Error( 'update_nav_menu_item_failed', __( 'The given object ID is not that of a menu item.' ) );

	$menu = wp_get_nav_menu_object( $menu_id );

	if ( ! $menu && 0 !== $menu_id ) {
		return new WP_Error( 'invalid_menu_id', __( 'Invalid menu ID.' ) );
	}

	if ( is_wp_error( $menu ) ) {
		return $menu;
	}

	$defaults = array(
		'menu-item-db-id' => $menu_item_db_id,
		'menu-item-object-id' => 0,
		'menu-item-object' => '',
		'menu-item-parent-id' => 0,
		'menu-item-position' => 0,
		'menu-item-type' => 'custom',
		'menu-item-title' => '',
		'menu-item-url' => '',
		'menu-item-description' => '',
		'menu-item-attr-title' => '',
		'menu-item-target' => '',
		'menu-item-classes' => '',
		'menu-item-xfn' => '',
		'menu-item-status' => '',
	);

	$args = wp_parse_args( $menu_item_data, $defaults );

	if ( 0 == $menu_id ) {
		$args['menu-item-position'] = 1;
	} elseif ( 0 == (int) $args['menu-item-position'] ) {
		$menu_items = 0 == $menu_id ? array() : (array) wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish,draft' ) );
		$last_item = array_pop( $menu_items );
		$args['menu-item-position'] = ( $last_item && isset( $last_item->menu_order ) ) ? 1 + $last_item->menu_order : count( $menu_items );
	}

	$original_parent = 0 < $menu_item_db_id ? get_post_field( 'post_parent', $menu_item_db_id ) : 0;

	if ( 'custom' != $args['menu-item-type'] ) {
		/* if non-custom menu item, then:
			* use original object's URL
			* blank default title to sync with original object's
		*/

		$args['menu-item-url'] = '';

		$original_title = '';
		if ( 'taxonomy' == $args['menu-item-type'] ) {
			$original_parent = get_term_field( 'parent', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
			$original_title = get_term_field( 'name', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
		} elseif ( 'post_type' == $args['menu-item-type'] ) {

			$original_object = get_post( $args['menu-item-object-id'] );
			$original_parent = (int) $original_object->post_parent;
			$original_title = $original_object->post_title;
		}

		if ( $args['menu-item-title'] == $original_title )
			$args['menu-item-title'] = '';

		// hack to get wp to create a post object when too many properties are empty
		if ( '' ==  $args['menu-item-title'] && '' == $args['menu-item-description'] )
			$args['menu-item-description'] = ' ';
	}

	// Populate the menu item object
	$post = array(
		'menu_order' => $args['menu-item-position'],
		'ping_status' => 0,
		'post_content' => $args['menu-item-description'],
		'post_excerpt' => $args['menu-item-attr-title'],
		'post_parent' => $original_parent,
		'post_title' => $args['menu-item-title'],
		'post_type' => 'nav_menu_item',
	);

	$update = 0 != $menu_item_db_id;

	// New menu item. Default is draft status
	if ( ! $update ) {
		$post['ID'] = 0;
		$post['post_status'] = 'publish' == $args['menu-item-status'] ? 'publish' : 'draft';
		$menu_item_db_id = wp_insert_post( $post );
		if ( ! $menu_item_db_id	|| is_wp_error( $menu_item_db_id ) )
			return $menu_item_db_id;
	}

	// Associate the menu item with the menu term
	// Only set the menu term if it isn't set to avoid unnecessary wp_get_object_terms()
	 if ( $menu_id && ( ! $update || ! is_object_in_term( $menu_item_db_id, 'nav_menu', (int) $menu->term_id ) ) ) {
		wp_set_object_terms( $menu_item_db_id, array( $menu->term_id ), 'nav_menu' );
	}

	if ( 'custom' == $args['menu-item-type'] ) {
		$args['menu-item-object-id'] = $menu_item_db_id;
		$args['menu-item-object'] = 'custom';
	}

	$menu_item_db_id = (int) $menu_item_db_id;

	update_post_meta( $menu_item_db_id, '_menu_item_type', sanitize_key($args['menu-item-type']) );
	update_post_meta( $menu_item_db_id, '_menu_item_menu_item_parent', strval( (int) $args['menu-item-parent-id'] ) );
	update_post_meta( $menu_item_db_id, '_menu_item_object_id', strval( (int) $args['menu-item-object-id'] ) );
	update_post_meta( $menu_item_db_id, '_menu_item_object', sanitize_key($args['menu-item-object']) );
	update_post_meta( $menu_item_db_id, '_menu_item_target', sanitize_key($args['menu-item-target']) );

	$args['menu-item-classes'] = array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-classes'] ) );
	$args['menu-item-xfn'] = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-xfn'] ) ) );
	update_post_meta( $menu_item_db_id, '_menu_item_classes', $args['menu-item-classes'] );
	update_post_meta( $menu_item_db_id, '_menu_item_xfn', $args['menu-item-xfn'] );
	update_post_meta( $menu_item_db_id, '_menu_item_url', esc_url_raw($args['menu-item-url']) );

	if ( 0 == $menu_id )
		update_post_meta( $menu_item_db_id, '_menu_item_orphaned', (string) time() );
	elseif ( get_post_meta( $menu_item_db_id, '_menu_item_orphaned' ) )
		delete_post_meta( $menu_item_db_id, '_menu_item_orphaned' );

	// Update existing menu item. Default is publish status
	if ( $update ) {
		$post['ID'] = $menu_item_db_id;
		$post['post_status'] = 'draft' == $args['menu-item-status'] ? 'draft' : 'publish';
		wp_update_post( $post );
	}

	/**
	 * Fires after a navigation menu item has been updated.
	 *
	 * @since 3.0.0
	 *
	 * @see wp_update_nav_menu_items()
	 *
	 * @param int   $menu_id         ID of the updated menu.
	 * @param int   $menu_item_db_id ID of the updated menu item.
	 * @param array $args            An array of arguments used to update a menu item.
	 */
	do_action( 'wp_update_nav_menu_item', $menu_id, $menu_item_db_id, $args );

	return $menu_item_db_id;
}

/**
 * Returns all navigation menu objects.
 *
 * @since 3.0.0
 *
 * @param array $args Array of arguments passed on to get_terms().
 * @return array menu objects
 */
function wp_get_nav_menus( $args = array() ) {
	$defaults = array( 'hide_empty' => false, 'orderby' => 'none' );
	$args = wp_parse_args( $args, $defaults );

	/**
	 * Filter the navigation menu objects being returned.
	 *
	 * @since 3.0.0
	 *
	 * @see get_terms()
	 *
	 * @param array $menus An array of menu objects.
	 * @param array $args  An array of arguments used to retrieve menu objects.
	 */
	return apply_filters( 'wp_get_nav_menus', get_terms( 'nav_menu',  $args), $args );
}

/**
 * Sort menu items by the desired key.
 *
 * @since 3.0.0
 * @access private
 *
 * @param object $a The first object to compare
 * @param object $b The second object to compare
 * @return int -1, 0, or 1 if $a is considered to be respectively less than, equal to, or greater than $b.
 */
function _sort_nav_menu_items( $a, $b ) {
	global $_menu_item_sort_prop;

	if ( empty( $_menu_item_sort_prop ) )
		return 0;

	if ( ! isset( $a->$_menu_item_sort_prop ) || ! isset( $b->$_menu_item_sort_prop ) )
		return 0;

	$_a = (int) $a->$_menu_item_sort_prop;
	$_b = (int) $b->$_menu_item_sort_prop;

	if ( $a->$_menu_item_sort_prop == $b->$_menu_item_sort_prop )
		return 0;
	elseif ( $_a == $a->$_menu_item_sort_prop && $_b == $b->$_menu_item_sort_prop )
		return $_a < $_b ? -1 : 1;
	else
		return strcmp( $a->$_menu_item_sort_prop, $b->$_menu_item_sort_prop );
}

/**
 * Returns if a menu item is valid. Bug #13958
 *
 * @since 3.2.0
 * @access private
 *
 * @param object $menu_item The menu item to check
 * @return bool false if invalid, else true.
 */
function _is_valid_nav_menu_item( $item ) {
	if ( ! empty( $item->_invalid ) )
		return false;

	return true;
}

/**
 * Returns all menu items of a navigation menu.
 *
 * @since 3.0.0
 *
 * @param string $menu menu name, id, or slug
 * @param string $args
 * @return mixed $items array of menu items, else false.
 */
function wp_get_nav_menu_items( $menu, $args = array() ) {
	$menu = wp_get_nav_menu_object( $menu );

	if ( ! $menu )
		return false;

	static $fetched = array();

	$items = get_objects_in_term( $menu->term_id, 'nav_menu' );

	if ( empty( $items ) )
		return $items;

	$defaults = array( 'order' => 'ASC', 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item',
		'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order', 'nopaging' => true );
	$args = wp_parse_args( $args, $defaults );
	$args['include'] = $items;

	$items = get_posts( $args );

	if ( is_wp_error( $items ) || ! is_array( $items ) )
		return false;

	// Get all posts and terms at once to prime the caches
	if ( empty( $fetched[$menu->term_id] ) || wp_using_ext_object_cache() ) {
		$fetched[$menu->term_id] = true;
		$posts = array();
		$terms = array();
		foreach ( $items as $item ) {
			$object_id = get_post_meta( $item->ID, '_menu_item_object_id', true );
			$object    = get_post_meta( $item->ID, '_menu_item_object',    true );
			$type      = get_post_meta( $item->ID, '_menu_item_type',      true );

			if ( 'post_type' == $type )
				$posts[$object][] = $object_id;
			elseif ( 'taxonomy' == $type)
				$terms[$object][] = $object_id;
		}

		if ( ! empty( $posts ) ) {
			foreach ( array_keys($posts) as $post_type ) {
				get_posts( array('post__in' => $posts[$post_type], 'post_type' => $post_type, 'nopaging' => true, 'update_post_term_cache' => false) );
			}
		}
		unset($posts);

		if ( ! empty( $terms ) ) {
			foreach ( array_keys($terms) as $taxonomy ) {
				get_terms($taxonomy, array('include' => $terms[$taxonomy]) );
			}
		}
		unset($terms);
	}

	$items = array_map( 'wp_setup_nav_menu_item', $items );

	if ( ! is_admin() ) // Remove invalid items only in frontend
		$items = array_filter( $items, '_is_valid_nav_menu_item' );

	if ( ARRAY_A == $args['output'] ) {
		$GLOBALS['_menu_item_sort_prop'] = $args['output_key'];
		usort($items, '_sort_nav_menu_items');
		$i = 1;
		foreach( $items as $k => $item ) {
			$items[$k]->$args['output_key'] = $i++;
		}
	}

	/**
	 * Filter the navigation menu items being returned.
	 *
	 * @since 3.0.0
	 *
	 * @param array  $items An array of menu item post objects.
	 * @param object $menu  The menu object.
	 * @param array  $args  An array of arguments used to retrieve menu item objects.
	 */
	return apply_filters( 'wp_get_nav_menu_items',  $items, $menu, $args );
}

/**
 * Decorates a menu item object with the shared navigation menu item properties.
 *
 * Properties:
 * - db_id: 		The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist).
 * - object_id:		The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories.
 * - type:		The family of objects originally represented, such as "post_type" or "taxonomy."
 * - object:		The type of object originally represented, such as "category," "post", or "attachment."
 * - type_label:	The singular label used to describe this type of menu item.
 * - post_parent:	The DB ID of the original object's parent object, if any (0 otherwise).
 * - menu_item_parent: 	The DB ID of the nav_menu_item that is this item's menu parent, if any. 0 otherwise.
 * - url:		The URL to which this menu item points.
 * - title:		The title of this menu item.
 * - target: 		The target attribute of the link element for this menu item.
 * - attr_title:	The title attribute of the link element for this menu item.
 * - classes:		The array of class attribute values for the link element of this menu item.
 * - xfn:		The XFN relationship expressed in the link of this menu item.
 * - description:	The description of this menu item.
 *
 * @since 3.0.0
 *
 * @param object $menu_item The menu item to modify.
 * @return object $menu_item The menu item with standard menu item properties.
 */
function wp_setup_nav_menu_item( $menu_item ) {
	if ( isset( $menu_item->post_type ) ) {
		if ( 'nav_menu_item' == $menu_item->post_type ) {
			$menu_item->db_id = (int) $menu_item->ID;
			$menu_item->menu_item_parent = empty( $menu_item->menu_item_parent ) ? get_post_meta( $menu_item->ID, '_menu_item_menu_item_parent', true ) : $menu_item->menu_item_parent;
			$menu_item->object_id = empty( $menu_item->object_id ) ? get_post_meta( $menu_item->ID, '_menu_item_object_id', true ) : $menu_item->object_id;
			$menu_item->object = empty( $menu_item->object ) ? get_post_meta( $menu_item->ID, '_menu_item_object', true ) : $menu_item->object;
			$menu_item->type = empty( $menu_item->type ) ? get_post_meta( $menu_item->ID, '_menu_item_type', true ) : $menu_item->type;

			if ( 'post_type' == $menu_item->type ) {
				$object = get_post_type_object( $menu_item->object );
				if ( $object ) {
					$menu_item->type_label = $object->labels->singular_name;
				} else {
					$menu_item->type_label = $menu_item->object;
					$menu_item->_invalid = true;
				}

				$menu_item->url = get_permalink( $menu_item->object_id );

				$original_object = get_post( $menu_item->object_id );
				$original_title = $original_object->post_title;
				$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;

			} elseif ( 'taxonomy' == $menu_item->type ) {
				$object = get_taxonomy( $menu_item->object );
				if ( $object ) {
					$menu_item->type_label = $object->labels->singular_name;
				} else {
					$menu_item->type_label = $menu_item->object;
					$menu_item->_invalid = true;
				}

				$term_url = get_term_link( (int) $menu_item->object_id, $menu_item->object );
				$menu_item->url = !is_wp_error( $term_url ) ? $term_url : '';

				$original_title = get_term_field( 'name', $menu_item->object_id, $menu_item->object, 'raw' );
				if ( is_wp_error( $original_title ) )
					$original_title = false;
				$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;

			} else {
				$menu_item->type_label = __('Custom');
				$menu_item->title = $menu_item->post_title;
				$menu_item->url = empty( $menu_item->url ) ? get_post_meta( $menu_item->ID, '_menu_item_url', true ) : $menu_item->url;
			}

			$menu_item->target = empty( $menu_item->target ) ? get_post_meta( $menu_item->ID, '_menu_item_target', true ) : $menu_item->target;

			/**
			 * Filter a navigation menu item's title attribute.
			 *
			 * @since 3.0.0
			 *
			 * @param string $item_title The menu item title attribute.
			 */
			$menu_item->attr_title = empty( $menu_item->attr_title ) ? apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ) : $menu_item->attr_title;

			if ( empty( $menu_item->description ) ) {
				/**
				 * Filter a navigation menu item's description.
				 *
				 * @since 3.0.0
				 *
				 * @param string $description The menu item description.
				 */
				$menu_item->description = apply_filters( 'nav_menu_description', wp_trim_words( $menu_item->post_content, 200 ) );
			}

			$menu_item->classes = empty( $menu_item->classes ) ? (array) get_post_meta( $menu_item->ID, '_menu_item_classes', true ) : $menu_item->classes;
			$menu_item->xfn = empty( $menu_item->xfn ) ? get_post_meta( $menu_item->ID, '_menu_item_xfn', true ) : $menu_item->xfn;
		} else {
			$menu_item->db_id = 0;
			$menu_item->menu_item_parent = 0;
			$menu_item->object_id = (int) $menu_item->ID;
			$menu_item->type = 'post_type';

			$object = get_post_type_object( $menu_item->post_type );
			$menu_item->object = $object->name;
			$menu_item->type_label = $object->labels->singular_name;

			if ( '' === $menu_item->post_title )
				$menu_item->post_title = sprintf( __( '#%d (no title)' ), $menu_item->ID );

			$menu_item->title = $menu_item->post_title;
			$menu_item->url = get_permalink( $menu_item->ID );
			$menu_item->target = '';

			/** This filter is documented in wp-includes/nav-menu.php */
			$menu_item->attr_title = apply_filters( 'nav_menu_attr_title', '' );

			/** This filter is documented in wp-includes/nav-menu.php */
			$menu_item->description = apply_filters( 'nav_menu_description', '' );
			$menu_item->classes = array();
			$menu_item->xfn = '';
		}
	} elseif ( isset( $menu_item->taxonomy ) ) {
		$menu_item->ID = $menu_item->term_id;
		$menu_item->db_id = 0;
		$menu_item->menu_item_parent = 0;
		$menu_item->object_id = (int) $menu_item->term_id;
		$menu_item->post_parent = (int) $menu_item->parent;
		$menu_item->type = 'taxonomy';

		$object = get_taxonomy( $menu_item->taxonomy );
		$menu_item->object = $object->name;
		$menu_item->type_label = $object->labels->singular_name;

		$menu_item->title = $menu_item->name;
		$menu_item->url = get_term_link( $menu_item, $menu_item->taxonomy );
		$menu_item->target = '';
		$menu_item->attr_title = '';
		$menu_item->description = get_term_field( 'description', $menu_item->term_id, $menu_item->taxonomy );
		$menu_item->classes = array();
		$menu_item->xfn = '';

	}

	/**
	 * Filter a navigation menu item object.
	 *
	 * @since 3.0.0
	 *
	 * @param object $menu_item The menu item object.
	 */
	return apply_filters( 'wp_setup_nav_menu_item', $menu_item );
}

/**
 * Get the menu items associated with a particular object.
 *
 * @since 3.0.0
 *
 * @param int $object_id The ID of the original object.
 * @param string $object_type The type of object, such as "taxonomy" or "post_type."
 * @param string $taxonomy If $object_type is "taxonomy", $taxonomy is the name of the tax that $object_id belongs to
 * @return array The array of menu item IDs; empty array if none;
 */
function wp_get_associated_nav_menu_items( $object_id = 0, $object_type = 'post_type', $taxonomy = '' ) {
	$object_id = (int) $object_id;
	$menu_item_ids = array();

	$query = new WP_Query;
	$menu_items = $query->query(
		array(
			'meta_key' => '_menu_item_object_id',
			'meta_value' => $object_id,
			'post_status' => 'any',
			'post_type' => 'nav_menu_item',
			'posts_per_page' => -1,
		)
	);
	foreach( (array) $menu_items as $menu_item ) {
		if ( isset( $menu_item->ID ) && is_nav_menu_item( $menu_item->ID ) ) {
			$menu_item_type = get_post_meta( $menu_item->ID, '_menu_item_type', true );
			if (
				'post_type' == $object_type &&
				'post_type' == $menu_item_type
			) {
				$menu_item_ids[] = (int) $menu_item->ID;
			} else if (
				'taxonomy' == $object_type &&
				'taxonomy' == $menu_item_type &&
				get_post_meta( $menu_item->ID, '_menu_item_object', true ) == $taxonomy
			) {
				$menu_item_ids[] = (int) $menu_item->ID;
			}
		}
	}

	return array_unique( $menu_item_ids );
}

/**
 * Callback for handling a menu item when its original object is deleted.
 *
 * @since 3.0.0
 * @access private
 *
 * @param int $object_id The ID of the original object being trashed.
 *
 */
function _wp_delete_post_menu_item( $object_id = 0 ) {
	$object_id = (int) $object_id;

	$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'post_type' );

	foreach( (array) $menu_item_ids as $menu_item_id ) {
		wp_delete_post( $menu_item_id, true );
	}
}

/**
 * Callback for handling a menu item when its original object is deleted.
 *
 * @since 3.0.0
 * @access private
 *
 * @param int $object_id The ID of the original object being trashed.
 *
 */
function _wp_delete_tax_menu_item( $object_id = 0, $tt_id, $taxonomy ) {
	$object_id = (int) $object_id;

	$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'taxonomy', $taxonomy );

	foreach( (array) $menu_item_ids as $menu_item_id ) {
		wp_delete_post( $menu_item_id, true );
	}
}

/**
 * Automatically add newly published page objects to menus with that as an option.
 *
 * @since 3.0.0
 * @access private
 *
 * @param string $new_status The new status of the post object.
 * @param string $old_status The old status of the post object.
 * @param object $post The post object being transitioned from one status to another.
 * @return void
 */
function _wp_auto_add_pages_to_menu( $new_status, $old_status, $post ) {
	if ( 'publish' != $new_status || 'publish' == $old_status || 'page' != $post->post_type )
		return;
	if ( ! empty( $post->post_parent ) )
		return;
	$auto_add = get_option( 'nav_menu_options' );
	if ( empty( $auto_add ) || ! is_array( $auto_add ) || ! isset( $auto_add['auto_add'] ) )
		return;
	$auto_add = $auto_add['auto_add'];
	if ( empty( $auto_add ) || ! is_array( $auto_add ) )
		return;

	$args = array(
		'menu-item-object-id' => $post->ID,
		'menu-item-object' => $post->post_type,
		'menu-item-type' => 'post_type',
		'menu-item-status' => 'publish',
	);

	foreach ( $auto_add as $menu_id ) {
		$items = wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish,draft' ) );
		if ( ! is_array( $items ) )
			continue;
		foreach ( $items as $item ) {
			if ( $post->ID == $item->object_id )
				continue 2;
		}
		wp_update_nav_menu_item( $menu_id, 0, $args );
	}
}

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<?php

/**

* Navigation Menu functions

* @package WordPress

* @subpackage Nav_Menus

* @since 3.0.0

/**

* Returns a navigation menu object.

* @since 3.0.0

* @uses get_term

* @uses get_term_by

* @param string $menu Menu ID, slug, or name.

* @return mixed false if $menu param isn't supplied or term does not exist, menu object if successful.

function wp_get_nav_menu_object( $menu ) {

if ( ! $menu )

return false;

$menu_obj = get_term( $menu, 'nav_menu' );

if ( ! $menu_obj )

$menu_obj = get_term_by( 'slug', $menu, 'nav_menu' );

if ( ! $menu_obj )

$menu_obj = get_term_by( 'name', $menu, 'nav_menu' );

if ( ! $menu_obj )

$menu_obj = false;

return $menu_obj;

}

/**

* Check if the given ID is a navigation menu.

* Returns true if it is; false otherwise.

* @since 3.0.0

* @param int|string $menu The menu to check (ID, slug, or name).

* @return bool Whether the menu exists.

function is_nav_menu( $menu ) {

if ( ! $menu )

return false;

$menu_obj = wp_get_nav_menu_object( $menu );

if (

$menu_obj &&

! is_wp_error( $menu_obj ) &&

! empty( $menu_obj->taxonomy ) &&

'nav_menu' == $menu_obj->taxonomy

)

return true;

return false;

}

/**

* Register navigation menus for a theme.

* @since 3.0.0

* @param array $locations Associative array of menu location identifiers (like a slug) and descriptive text.

function register_nav_menus( $locations = array() ) {

global $_wp_registered_nav_menus;

add_theme_support( 'menus' );

$_wp_registered_nav_menus = array_merge( (array) $_wp_registered_nav_menus, $locations );

}

/**

* Unregisters a navigation menu for a theme.

* @param array $location the menu location identifier

* @return bool True on success, false on failure.

function unregister_nav_menu( $location ) {

global $_wp_registered_nav_menus;

if ( is_array( $_wp_registered_nav_menus ) && isset( $_wp_registered_nav_menus[$location] ) ) {

unset( $_wp_registered_nav_menus[$location] );

if ( empty( $_wp_registered_nav_menus ) ) {

_remove_theme_support( 'menus' );

}

return true;

}

return false;

}

/**

* Register a navigation menu for a theme.

* @since 3.0.0

* @param string $location Menu location identifier, like a slug.

* @param string $description Menu location descriptive text.

function register_nav_menu( $location, $description ) {

register_nav_menus( array( $location => $description ) );

}

/**

* Returns an array of all registered navigation menus in a theme

* @since 3.0.0

* @return array

function get_registered_nav_menus() {

global $_wp_registered_nav_menus;

if ( isset( $_wp_registered_nav_menus ) )

return $_wp_registered_nav_menus;

return array();

}

/**

* Returns an array with the registered navigation menu locations and the menu assigned to it

* @since 3.0.0

* @return array

function get_nav_menu_locations() {

$locations = get_theme_mod( 'nav_menu_locations' );

return ( is_array( $locations ) ) ? $locations : array();

}

/**

* Whether a registered nav menu location has a menu assigned to it.

* @since 3.0.0

* @param string $location Menu location identifier.

* @return bool Whether location has a menu.

function has_nav_menu( $location ) {

global $_wp_registered_nav_menus;

if ( ! isset( $_wp_registered_nav_menus[ $location ] ) ) {

return false;

}

$locations = get_nav_menu_locations();

return ( ! empty( $locations[ $location ] ) );

}

/**

* Determine whether the given ID is a nav menu item.

* @since 3.0.0

* @param int $menu_item_id The ID of the potential nav menu item.

* @return bool Whether the given ID is that of a nav menu item.

function is_nav_menu_item( $menu_item_id = 0 ) {

return ( ! is_wp_error( $menu_item_id ) && ( 'nav_menu_item' == get_post_type( $menu_item_id ) ) );

}

/**

* Create a Navigation Menu.

* @since 3.0.0

* @param string $menu_name Menu name.

* @return int|WP_Error Menu ID on success, WP_Error object on failure.

function wp_create_nav_menu( $menu_name ) {

return wp_update_nav_menu_object( 0, array( 'menu-name' => $menu_name ) );

}

/**

* Delete a Navigation Menu.

* @since 3.0.0

* @param string $menu Menu ID, slug, or name.

* @return bool|WP_Error True on success, false or WP_Error object on failure.

function wp_delete_nav_menu( $menu ) {

$menu = wp_get_nav_menu_object( $menu );

if ( ! $menu )

return false;

$menu_objects = get_objects_in_term( $menu->term_id, 'nav_menu' );

if ( ! empty( $menu_objects ) ) {

foreach ( $menu_objects as $item ) {

wp_delete_post( $item );

}

$result = wp_delete_term( $menu->term_id, 'nav_menu' );

// Remove this menu from any locations.

$locations = get_nav_menu_locations();

foreach ( $locations as $location => $menu_id ) {

if ( $menu_id == $menu->term_id )

$locations[ $location ] = 0;

}

set_theme_mod( 'nav_menu_locations', $locations );

if ( $result && !is_wp_error($result) )

/**

* Fires after a navigation menu has been successfully deleted.

* @since 3.0.0

* @param int $term_id ID of the deleted menu.

do_action( 'wp_delete_nav_menu', $menu->term_id );

return $result;

}

/**

* Save the properties of a menu or create a new menu with those properties.

* @since 3.0.0

* @param int $menu_id The ID of the menu or "0" to create a new menu.

* @param array $menu_data The array of menu data.

* @return int|WP_Error Menu ID on success, WP_Error object on failure.

function wp_update_nav_menu_object( $menu_id = 0, $menu_data = array() ) {

$menu_id = (int) $menu_id;

$_menu = wp_get_nav_menu_object( $menu_id );

$args = array(

'description' => ( isset( $menu_data['description'] ) ? $menu_data['description'] : '' ),

'name' => ( isset( $menu_data['menu-name'] ) ? $menu_data['menu-name'] : '' ),

'parent' => ( isset( $menu_data['parent'] ) ? (int) $menu_data['parent'] : 0 ),

'slug' => null,

);

// double-check that we're not going to have one menu take the name of another

$_possible_existing = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );

if (

$_possible_existing &&

! is_wp_error( $_possible_existing ) &&

isset( $_possible_existing->term_id ) &&

$_possible_existing->term_id != $menu_id

)

return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );

// menu doesn't already exist, so create a new menu

if ( ! $_menu || is_wp_error( $_menu ) ) {

$menu_exists = get_term_by( 'name', $menu_data['menu-name'], 'nav_menu' );

if ( $menu_exists )

return new WP_Error( 'menu_exists', sprintf( __('The menu name <strong>%s</strong> conflicts with another menu name. Please try another.'), esc_html( $menu_data['menu-name'] ) ) );

$_menu = wp_insert_term( $menu_data['menu-name'], 'nav_menu', $args );

if ( is_wp_error( $_menu ) )

return $_menu;

/**

* Fires after a navigation menu is successfully created.

* @since 3.0.0

* @param int $term_id ID of the new menu.

* @param array $menu_data An array of menu data.

do_action( 'wp_create_nav_menu', $_menu['term_id'], $menu_data );

return (int) $_menu['term_id'];

}

if ( ! $_menu || ! isset( $_menu->term_id ) )

return 0;

$menu_id = (int) $_menu->term_id;

$update_response = wp_update_term( $menu_id, 'nav_menu', $args );

if ( is_wp_error( $update_response ) )

return $update_response;

/**

* Fires after a navigation menu has been successfully updated.

* @since 3.0.0

* @param int $menu_id ID of the updated menu.

* @param array $menu_data An array of menu data.

do_action( 'wp_update_nav_menu', $menu_id, $menu_data );

return $menu_id;

}

/**

* Save the properties of a menu item or create a new one.

* @since 3.0.0

* @param int $menu_id The ID of the menu. Required. If "0", makes the menu item a draft orphan.

* @param int $menu_item_db_id The ID of the menu item. If "0", creates a new menu item.

* @param array $menu_item_data The menu item's data.

* @return int|WP_Error The menu item's database ID or WP_Error object on failure.

function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item_data = array() ) {

$menu_id = (int) $menu_id;

$menu_item_db_id = (int) $menu_item_db_id;

// make sure that we don't convert non-nav_menu_item objects into nav_menu_item objects

if ( ! empty( $menu_item_db_id ) && ! is_nav_menu_item( $menu_item_db_id ) )

return new WP_Error( 'update_nav_menu_item_failed', __( 'The given object ID is not that of a menu item.' ) );

$menu = wp_get_nav_menu_object( $menu_id );

if ( ! $menu && 0 !== $menu_id ) {

return new WP_Error( 'invalid_menu_id', __( 'Invalid menu ID.' ) );

}

if ( is_wp_error( $menu ) ) {

return $menu;

}

$defaults = array(

'menu-item-db-id' => $menu_item_db_id,

'menu-item-object-id' => 0,

'menu-item-object' => '',

'menu-item-parent-id' => 0,

'menu-item-position' => 0,

'menu-item-type' => 'custom',

'menu-item-title' => '',

'menu-item-url' => '',

'menu-item-description' => '',

'menu-item-attr-title' => '',

'menu-item-target' => '',

'menu-item-classes' => '',

'menu-item-xfn' => '',

'menu-item-status' => '',

);

$args = wp_parse_args( $menu_item_data, $defaults );

if ( 0 == $menu_id ) {

$args['menu-item-position'] = 1;

} elseif ( 0 == (int) $args['menu-item-position'] ) {

$menu_items = 0 == $menu_id ? array() : (array) wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish,draft' ) );

$last_item = array_pop( $menu_items );

$args['menu-item-position'] = ( $last_item && isset( $last_item->menu_order ) ) ? 1 + $last_item->menu_order : count( $menu_items );

}

$original_parent = 0 < $menu_item_db_id ? get_post_field( 'post_parent', $menu_item_db_id ) : 0;

if ( 'custom' != $args['menu-item-type'] ) {

/* if non-custom menu item, then:

* use original object's URL

* blank default title to sync with original object's

$args['menu-item-url'] = '';

$original_title = '';

if ( 'taxonomy' == $args['menu-item-type'] ) {

$original_parent = get_term_field( 'parent', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );

$original_title = get_term_field( 'name', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );

} elseif ( 'post_type' == $args['menu-item-type'] ) {

$original_object = get_post( $args['menu-item-object-id'] );

$original_parent = (int) $original_object->post_parent;

$original_title = $original_object->post_title;

}

if ( $args['menu-item-title'] == $original_title )

$args['menu-item-title'] = '';

// hack to get wp to create a post object when too many properties are empty

if ( '' == $args['menu-item-title'] && '' == $args['menu-item-description'] )

$args['menu-item-description'] = ' ';

}

// Populate the menu item object

$post = array(

'menu_order' => $args['menu-item-position'],

'ping_status' => 0,

'post_content' => $args['menu-item-description'],

'post_excerpt' => $args['menu-item-attr-title'],

'post_parent' => $original_parent,

'post_title' => $args['menu-item-title'],

'post_type' => 'nav_menu_item',

);

$update = 0 != $menu_item_db_id;

// New menu item. Default is draft status

if ( ! $update ) {

$post['ID'] = 0;

$post['post_status'] = 'publish' == $args['menu-item-status'] ? 'publish' : 'draft';

$menu_item_db_id = wp_insert_post( $post );

if ( ! $menu_item_db_id || is_wp_error( $menu_item_db_id ) )

return $menu_item_db_id;

}

// Associate the menu item with the menu term

// Only set the menu term if it isn't set to avoid unnecessary wp_get_object_terms()

if ( $menu_id && ( ! $update || ! is_object_in_term( $menu_item_db_id, 'nav_menu', (int) $menu->term_id ) ) ) {

wp_set_object_terms( $menu_item_db_id, array( $menu->term_id ), 'nav_menu' );

}

if ( 'custom' == $args['menu-item-type'] ) {

$args['menu-item-object-id'] = $menu_item_db_id;

$args['menu-item-object'] = 'custom';

}

$menu_item_db_id = (int) $menu_item_db_id;

update_post_meta( $menu_item_db_id, '_menu_item_type', sanitize_key($args['menu-item-type']) );

update_post_meta( $menu_item_db_id, '_menu_item_menu_item_parent', strval( (int) $args['menu-item-parent-id'] ) );

update_post_meta( $menu_item_db_id, '_menu_item_object_id', strval( (int) $args['menu-item-object-id'] ) );

update_post_meta( $menu_item_db_id, '_menu_item_object', sanitize_key($args['menu-item-object']) );

update_post_meta( $menu_item_db_id, '_menu_item_target', sanitize_key($args['menu-item-target']) );

$args['menu-item-classes'] = array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-classes'] ) );

$args['menu-item-xfn'] = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['menu-item-xfn'] ) ) );

update_post_meta( $menu_item_db_id, '_menu_item_classes', $args['menu-item-classes'] );

update_post_meta( $menu_item_db_id, '_menu_item_xfn', $args['menu-item-xfn'] );

update_post_meta( $menu_item_db_id, '_menu_item_url', esc_url_raw($args['menu-item-url']) );

if ( 0 == $menu_id )

update_post_meta( $menu_item_db_id, '_menu_item_orphaned', (string) time() );

elseif ( get_post_meta( $menu_item_db_id, '_menu_item_orphaned' ) )

delete_post_meta( $menu_item_db_id, '_menu_item_orphaned' );

// Update existing menu item. Default is publish status

if ( $update ) {

$post['ID'] = $menu_item_db_id;

$post['post_status'] = 'draft' == $args['menu-item-status'] ? 'draft' : 'publish';

wp_update_post( $post );

}

/**

* Fires after a navigation menu item has been updated.

* @since 3.0.0

* @see wp_update_nav_menu_items()

* @param int $menu_id ID of the updated menu.

* @param int $menu_item_db_id ID of the updated menu item.

* @param array $args An array of arguments used to update a menu item.

do_action( 'wp_update_nav_menu_item', $menu_id, $menu_item_db_id, $args );

return $menu_item_db_id;

}

/**

* Returns all navigation menu objects.

* @since 3.0.0

* @param array $args Array of arguments passed on to get_terms().

* @return array menu objects

function wp_get_nav_menus( $args = array() ) {

$defaults = array( 'hide_empty' => false, 'orderby' => 'none' );

$args = wp_parse_args( $args, $defaults );

/**

* Filter the navigation menu objects being returned.

* @since 3.0.0

* @see get_terms()

* @param array $menus An array of menu objects.

* @param array $args An array of arguments used to retrieve menu objects.

return apply_filters( 'wp_get_nav_menus', get_terms( 'nav_menu', $args), $args );

}

/**

* Sort menu items by the desired key.

* @since 3.0.0

* @access private

* @param object $a The first object to compare

* @param object $b The second object to compare

* @return int -1, 0, or 1 if $a is considered to be respectively less than, equal to, or greater than $b.

function _sort_nav_menu_items( $a, $b ) {

global $_menu_item_sort_prop;

if ( empty( $_menu_item_sort_prop ) )

return 0;

if ( ! isset( $a->$_menu_item_sort_prop ) || ! isset( $b->$_menu_item_sort_prop ) )

return 0;

$_a = (int) $a->$_menu_item_sort_prop;

$_b = (int) $b->$_menu_item_sort_prop;

if ( $a->$_menu_item_sort_prop == $b->$_menu_item_sort_prop )

return 0;

elseif ( $_a == $a->$_menu_item_sort_prop && $_b == $b->$_menu_item_sort_prop )

return $_a < $_b ? -1 : 1;

else

return strcmp( $a->$_menu_item_sort_prop, $b->$_menu_item_sort_prop );

}

/**

* Returns if a menu item is valid. Bug #13958

* @since 3.2.0

* @access private

* @param object $menu_item The menu item to check

* @return bool false if invalid, else true.

function _is_valid_nav_menu_item( $item ) {

if ( ! empty( $item->_invalid ) )

return false;

return true;

}

/**

* Returns all menu items of a navigation menu.

* @since 3.0.0

* @param string $menu menu name, id, or slug

* @param string $args

* @return mixed $items array of menu items, else false.

function wp_get_nav_menu_items( $menu, $args = array() ) {

$menu = wp_get_nav_menu_object( $menu );

if ( ! $menu )

return false;

static $fetched = array();

$items = get_objects_in_term( $menu->term_id, 'nav_menu' );

if ( empty( $items ) )

return $items;

$defaults = array( 'order' => 'ASC', 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item',

'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order', 'nopaging' => true );

$args = wp_parse_args( $args, $defaults );

$args['include'] = $items;

$items = get_posts( $args );

if ( is_wp_error( $items ) || ! is_array( $items ) )

return false;

// Get all posts and terms at once to prime the caches

if ( empty( $fetched[$menu->term_id] ) || wp_using_ext_object_cache() ) {

$fetched[$menu->term_id] = true;

$posts = array();

$terms = array();

foreach ( $items as $item ) {

$object_id = get_post_meta( $item->ID, '_menu_item_object_id', true );

$object = get_post_meta( $item->ID, '_menu_item_object', true );

$type = get_post_meta( $item->ID, '_menu_item_type', true );

if ( 'post_type' == $type )

$posts[$object][] = $object_id;

elseif ( 'taxonomy' == $type)

$terms[$object][] = $object_id;

}

if ( ! empty( $posts ) ) {

foreach ( array_keys($posts) as $post_type ) {

get_posts( array('post__in' => $posts[$post_type], 'post_type' => $post_type, 'nopaging' => true, 'update_post_term_cache' => false) );

}

unset($posts);

if ( ! empty( $terms ) ) {

foreach ( array_keys($terms) as $taxonomy ) {

get_terms($taxonomy, array('include' => $terms[$taxonomy]) );

}

unset($terms);

}

$items = array_map( 'wp_setup_nav_menu_item', $items );

if ( ! is_admin() ) // Remove invalid items only in frontend

$items = array_filter( $items, '_is_valid_nav_menu_item' );

if ( ARRAY_A == $args['output'] ) {

$GLOBALS['_menu_item_sort_prop'] = $args['output_key'];

usort($items, '_sort_nav_menu_items');

$i = 1;

foreach( $items as $k => $item ) {

$items[$k]->$args['output_key'] = $i++;

}

/**

* Filter the navigation menu items being returned.

* @since 3.0.0

* @param array $items An array of menu item post objects.

* @param object $menu The menu object.

* @param array $args An array of arguments used to retrieve menu item objects.

return apply_filters( 'wp_get_nav_menu_items', $items, $menu, $args );

}

/**

* Decorates a menu item object with the shared navigation menu item properties.

* Properties:

* - db_id: The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist).

* - object_id: The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories.

* - type: The family of objects originally represented, such as "post_type" or "taxonomy."

* - object: The type of object originally represented, such as "category," "post", or "attachment."

* - type_label: The singular label used to describe this type of menu item.

* - post_parent: The DB ID of the original object's parent object, if any (0 otherwise).

* - menu_item_parent: The DB ID of the nav_menu_item that is this item's menu parent, if any. 0 otherwise.

* - url: The URL to which this menu item points.

* - title: The title of this menu item.

* - target: The target attribute of the link element for this menu item.

* - attr_title: The title attribute of the link element for this menu item.

* - classes: The array of class attribute values for the link element of this menu item.

* - xfn: The XFN relationship expressed in the link of this menu item.

* - description: The description of this menu item.

* @since 3.0.0

* @param object $menu_item The menu item to modify.

* @return object $menu_item The menu item with standard menu item properties.

function wp_setup_nav_menu_item( $menu_item ) {

if ( isset( $menu_item->post_type ) ) {

if ( 'nav_menu_item' == $menu_item->post_type ) {

$menu_item->db_id = (int) $menu_item->ID;

$menu_item->menu_item_parent = empty( $menu_item->menu_item_parent ) ? get_post_meta( $menu_item->ID, '_menu_item_menu_item_parent', true ) : $menu_item->menu_item_parent;

$menu_item->object_id = empty( $menu_item->object_id ) ? get_post_meta( $menu_item->ID, '_menu_item_object_id', true ) : $menu_item->object_id;

$menu_item->object = empty( $menu_item->object ) ? get_post_meta( $menu_item->ID, '_menu_item_object', true ) : $menu_item->object;

$menu_item->type = empty( $menu_item->type ) ? get_post_meta( $menu_item->ID, '_menu_item_type', true ) : $menu_item->type;

if ( 'post_type' == $menu_item->type ) {

$object = get_post_type_object( $menu_item->object );

if ( $object ) {

$menu_item->type_label = $object->labels->singular_name;

} else {

$menu_item->type_label = $menu_item->object;

$menu_item->_invalid = true;

}

$menu_item->url = get_permalink( $menu_item->object_id );

$original_object = get_post( $menu_item->object_id );

$original_title = $original_object->post_title;

$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;

} elseif ( 'taxonomy' == $menu_item->type ) {

$object = get_taxonomy( $menu_item->object );

if ( $object ) {

$menu_item->type_label = $object->labels->singular_name;

} else {

$menu_item->type_label = $menu_item->object;

$menu_item->_invalid = true;

}

$term_url = get_term_link( (int) $menu_item->object_id, $menu_item->object );

$menu_item->url = !is_wp_error( $term_url ) ? $term_url : '';

$original_title = get_term_field( 'name', $menu_item->object_id, $menu_item->object, 'raw' );

if ( is_wp_error( $original_title ) )

$original_title = false;

$menu_item->title = '' == $menu_item->post_title ? $original_title : $menu_item->post_title;

} else {

$menu_item->type_label = __('Custom');

$menu_item->title = $menu_item->post_title;

$menu_item->url = empty( $menu_item->url ) ? get_post_meta( $menu_item->ID, '_menu_item_url', true ) : $menu_item->url;

}

$menu_item->target = empty( $menu_item->target ) ? get_post_meta( $menu_item->ID, '_menu_item_target', true ) : $menu_item->target;

/**

* Filter a navigation menu item's title attribute.

* @since 3.0.0

* @param string $item_title The menu item title attribute.

$menu_item->attr_title = empty( $menu_item->attr_title ) ? apply_filters( 'nav_menu_attr_title', $menu_item->post_excerpt ) : $menu_item->attr_title;

if ( empty( $menu_item->description ) ) {

/**

* Filter a navigation menu item's description.

* @since 3.0.0

* @param string $description The menu item description.

$menu_item->description = apply_filters( 'nav_menu_description', wp_trim_words( $menu_item->post_content, 200 ) );

}

$menu_item->classes = empty( $menu_item->classes ) ? (array) get_post_meta( $menu_item->ID, '_menu_item_classes', true ) : $menu_item->classes;

$menu_item->xfn = empty( $menu_item->xfn ) ? get_post_meta( $menu_item->ID, '_menu_item_xfn', true ) : $menu_item->xfn;

} else {

$menu_item->db_id = 0;

$menu_item->menu_item_parent = 0;

$menu_item->object_id = (int) $menu_item->ID;

$menu_item->type = 'post_type';

$object = get_post_type_object( $menu_item->post_type );

$menu_item->object = $object->name;

$menu_item->type_label = $object->labels->singular_name;

if ( '' === $menu_item->post_title )

$menu_item->post_title = sprintf( __( '#%d (no title)' ), $menu_item->ID );

$menu_item->title = $menu_item->post_title;

$menu_item->url = get_permalink( $menu_item->ID );

$menu_item->target = '';

/** This filter is documented in wp-includes/nav-menu.php */

$menu_item->attr_title = apply_filters( 'nav_menu_attr_title', '' );

/** This filter is documented in wp-includes/nav-menu.php */

$menu_item->description = apply_filters( 'nav_menu_description', '' );

$menu_item->classes = array();

$menu_item->xfn = '';

}

} elseif ( isset( $menu_item->taxonomy ) ) {

$menu_item->ID = $menu_item->term_id;

$menu_item->db_id = 0;

$menu_item->menu_item_parent = 0;

$menu_item->object_id = (int) $menu_item->term_id;

$menu_item->post_parent = (int) $menu_item->parent;

$menu_item->type = 'taxonomy';

$object = get_taxonomy( $menu_item->taxonomy );

$menu_item->object = $object->name;

$menu_item->type_label = $object->labels->singular_name;

$menu_item->title = $menu_item->name;

$menu_item->url = get_term_link( $menu_item, $menu_item->taxonomy );

$menu_item->target = '';

$menu_item->attr_title = '';

$menu_item->description = get_term_field( 'description', $menu_item->term_id, $menu_item->taxonomy );

$menu_item->classes = array();

$menu_item->xfn = '';

}

/**

* Filter a navigation menu item object.

* @since 3.0.0

* @param object $menu_item The menu item object.

return apply_filters( 'wp_setup_nav_menu_item', $menu_item );

}

/**

* Get the menu items associated with a particular object.

* @since 3.0.0

* @param int $object_id The ID of the original object.

* @param string $object_type The type of object, such as "taxonomy" or "post_type."

* @param string $taxonomy If $object_type is "taxonomy", $taxonomy is the name of the tax that $object_id belongs to

* @return array The array of menu item IDs; empty array if none;

function wp_get_associated_nav_menu_items( $object_id = 0, $object_type = 'post_type', $taxonomy = '' ) {

$object_id = (int) $object_id;

$menu_item_ids = array();

$query = new WP_Query;

$menu_items = $query->query(

array(

'meta_key' => '_menu_item_object_id',

'meta_value' => $object_id,

'post_status' => 'any',

'post_type' => 'nav_menu_item',

'posts_per_page' => -1,

)

);

foreach( (array) $menu_items as $menu_item ) {

if ( isset( $menu_item->ID ) && is_nav_menu_item( $menu_item->ID ) ) {

$menu_item_type = get_post_meta( $menu_item->ID, '_menu_item_type', true );

if (

'post_type' == $object_type &&

'post_type' == $menu_item_type

) {

$menu_item_ids[] = (int) $menu_item->ID;

} else if (

'taxonomy' == $object_type &&

'taxonomy' == $menu_item_type &&

get_post_meta( $menu_item->ID, '_menu_item_object', true ) == $taxonomy

) {

$menu_item_ids[] = (int) $menu_item->ID;

}

return array_unique( $menu_item_ids );

}

/**

* Callback for handling a menu item when its original object is deleted.

* @since 3.0.0

* @access private

* @param int $object_id The ID of the original object being trashed.

function _wp_delete_post_menu_item( $object_id = 0 ) {

$object_id = (int) $object_id;

$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'post_type' );

foreach( (array) $menu_item_ids as $menu_item_id ) {

wp_delete_post( $menu_item_id, true );

}

/**

* Callback for handling a menu item when its original object is deleted.

* @since 3.0.0

* @access private

* @param int $object_id The ID of the original object being trashed.

function _wp_delete_tax_menu_item( $object_id = 0, $tt_id, $taxonomy ) {

$object_id = (int) $object_id;

$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'taxonomy', $taxonomy );

foreach( (array) $menu_item_ids as $menu_item_id ) {

wp_delete_post( $menu_item_id, true );

}

/**

* Automatically add newly published page objects to menus with that as an option.

* @since 3.0.0

* @access private

* @param string $new_status The new status of the post object.

* @param string $old_status The old status of the post object.

* @param object $post The post object being transitioned from one status to another.

* @return void

function _wp_auto_add_pages_to_menu( $new_status, $old_status, $post ) {

if ( 'publish' != $new_status || 'publish' == $old_status || 'page' != $post->post_type )

return;

if ( ! empty( $post->post_parent ) )

return;

$auto_add = get_option( 'nav_menu_options' );

if ( empty( $auto_add ) || ! is_array( $auto_add ) || ! isset( $auto_add['auto_add'] ) )

return;

$auto_add = $auto_add['auto_add'];

if ( empty( $auto_add ) || ! is_array( $auto_add ) )

return;

$args = array(

'menu-item-object-id' => $post->ID,

'menu-item-object' => $post->post_type,

'menu-item-type' => 'post_type',

'menu-item-status' => 'publish',

);

foreach ( $auto_add as $menu_id ) {

$items = wp_get_nav_menu_items( $menu_id, array( 'post_status' => 'publish,draft' ) );

if ( ! is_array( $items ) )

continue;

foreach ( $items as $item ) {

if ( $post->ID == $item->object_id )

continue 2;

}

wp_update_nav_menu_item( $menu_id, 0, $args );

}

WordPressを読む　68-4 /blog/wp-includes/widgets.php 4

2014/12/04 Wordpress

/**
 * Look for "lost" widgets, this has to run at least on each theme change.
 *
 * @since 2.8.0
 *
 * @param mixed $theme_changed Whether the theme was changed as a boolean. A value
 *                             of 'customize' defers updates for the customizer.
 * @return array
 */
function retrieve_widgets( $theme_changed = false ) {
	global $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;

	$registered_sidebar_keys = array_keys( $wp_registered_sidebars );
	$orphaned = 0;

	$old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' );
	if ( is_array( $old_sidebars_widgets ) ) {
		// time() that sidebars were stored is in $old_sidebars_widgets['time']
		$_sidebars_widgets = $old_sidebars_widgets['data'];

		if ( 'customize' !== $theme_changed ) {
			remove_theme_mod( 'sidebars_widgets' );
		}

		foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
			if ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) {
				continue;
			}

			if ( !in_array( $sidebar, $registered_sidebar_keys ) ) {
				$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $widgets;
				unset( $_sidebars_widgets[$sidebar] );
			}
		}
	} else {
		if ( empty( $sidebars_widgets ) )
			return;

		unset( $sidebars_widgets['array_version'] );

		$old = array_keys($sidebars_widgets);
		sort($old);
		sort($registered_sidebar_keys);

		if ( $old == $registered_sidebar_keys )
			return;

		$_sidebars_widgets = array(
			'wp_inactive_widgets' => !empty( $sidebars_widgets['wp_inactive_widgets'] ) ? $sidebars_widgets['wp_inactive_widgets'] : array()
		);

		unset( $sidebars_widgets['wp_inactive_widgets'] );

		foreach ( $wp_registered_sidebars as $id => $settings ) {
			if ( $theme_changed ) {
				$_sidebars_widgets[$id] = array_shift( $sidebars_widgets );
			} else {
				// no theme change, grab only sidebars that are currently registered
				if ( isset( $sidebars_widgets[$id] ) ) {
					$_sidebars_widgets[$id] = $sidebars_widgets[$id];
					unset( $sidebars_widgets[$id] );
				}
			}
		}

		foreach ( $sidebars_widgets as $val ) {
			if ( is_array($val) && ! empty( $val ) )
				$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $val;
		}
	}

	// discard invalid, theme-specific widgets from sidebars
	$shown_widgets = array();

	foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
		if ( !is_array($widgets) )
			continue;

		$_widgets = array();
		foreach ( $widgets as $widget ) {
			if ( isset($wp_registered_widgets[$widget]) )
				$_widgets[] = $widget;
		}

		$_sidebars_widgets[$sidebar] = $_widgets;
		$shown_widgets = array_merge($shown_widgets, $_widgets);
	}

	$sidebars_widgets = $_sidebars_widgets;
	unset($_sidebars_widgets, $_widgets);

	// find hidden/lost multi-widget instances
	$lost_widgets = array();
	foreach ( $wp_registered_widgets as $key => $val ) {
		if ( in_array($key, $shown_widgets, true) )
			continue;

		$number = preg_replace('/.+?-([0-9]+)$/', '$1', $key);

		if ( 2 > (int) $number )
			continue;

		$lost_widgets[] = $key;
	}

	$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);
	if ( 'customize' !== $theme_changed ) {
		wp_set_sidebars_widgets( $sidebars_widgets );
	}

	return $sidebars_widgets;
}

100

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/**

* Look for "lost" widgets, this has to run at least on each theme change.

* @since 2.8.0

* @param mixed $theme_changed Whether the theme was changed as a boolean. A value

* of 'customize' defers updates for the customizer.

* @return array

function retrieve_widgets( $theme_changed = false ) {

global $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;

$registered_sidebar_keys = array_keys( $wp_registered_sidebars );

$orphaned = 0;

$old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' );

if ( is_array( $old_sidebars_widgets ) ) {

// time() that sidebars were stored is in $old_sidebars_widgets['time']

$_sidebars_widgets = $old_sidebars_widgets['data'];

if ( 'customize' !== $theme_changed ) {

remove_theme_mod( 'sidebars_widgets' );

}

foreach ( $_sidebars_widgets as $sidebar => $widgets ) {

if ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) {

continue;

}

if ( !in_array( $sidebar, $registered_sidebar_keys ) ) {

$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $widgets;

unset( $_sidebars_widgets[$sidebar] );

}

} else {

if ( empty( $sidebars_widgets ) )

return;

unset( $sidebars_widgets['array_version'] );

$old = array_keys($sidebars_widgets);

sort($old);

sort($registered_sidebar_keys);

if ( $old == $registered_sidebar_keys )

return;

$_sidebars_widgets = array(

'wp_inactive_widgets' => !empty( $sidebars_widgets['wp_inactive_widgets'] ) ? $sidebars_widgets['wp_inactive_widgets'] : array()

);

unset( $sidebars_widgets['wp_inactive_widgets'] );

foreach ( $wp_registered_sidebars as $id => $settings ) {

if ( $theme_changed ) {

$_sidebars_widgets[$id] = array_shift( $sidebars_widgets );

} else {

// no theme change, grab only sidebars that are currently registered

if ( isset( $sidebars_widgets[$id] ) ) {

$_sidebars_widgets[$id] = $sidebars_widgets[$id];

unset( $sidebars_widgets[$id] );

}

foreach ( $sidebars_widgets as $val ) {

if ( is_array($val) && ! empty( $val ) )

$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $val;

}

// discard invalid, theme-specific widgets from sidebars

$shown_widgets = array();

foreach ( $_sidebars_widgets as $sidebar => $widgets ) {

if ( !is_array($widgets) )

continue;

$_widgets = array();

foreach ( $widgets as $widget ) {

if ( isset($wp_registered_widgets[$widget]) )

$_widgets[] = $widget;

}

$_sidebars_widgets[$sidebar] = $_widgets;

$shown_widgets = array_merge($shown_widgets, $_widgets);

}

$sidebars_widgets = $_sidebars_widgets;

unset($_sidebars_widgets, $_widgets);

// find hidden/lost multi-widget instances

$lost_widgets = array();

foreach ( $wp_registered_widgets as $key => $val ) {

if ( in_array($key, $shown_widgets, true) )

continue;

$number = preg_replace('/.+?-([0-9]+)$/', '$1', $key);

if ( 2 > (int) $number )

continue;

$lost_widgets[] = $key;

}

$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);

if ( 'customize' !== $theme_changed ) {

wp_set_sidebars_widgets( $sidebars_widgets );

}

return $sidebars_widgets;

}

: WordPressを読む　68-3 /blog/wp-includes/widgets.php 3
2014/12/04 Wordpress
/blog/wp-includes/widgets.php3 [crayon-6 …

: WordPressを読む　68-2 /blog/wp-includes/widgets.php 2
2014/12/04 Wordpress
/blog/wp-includes/widgets.php2 [crayon-6 …

: WordPressを読む　68-1 /blog/wp-includes/widgets.php 1
2014/12/04 Wordpress
/blog/wp-includes/widgets.php1 WP_Widget …

: WordPressを読む　67-6 /blog/wp-includes/class-http.php 6
2014/12/04 Wordpress
/blog/wp-includes/class-http.php6 [crayo …

: WordPressを読む　67-5 /blog/wp-includes/class-http.php 5
2014/12/04 Wordpress
/blog/wp-includes/class-http.php5 [crayo …

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