WordPressを読む　48 /blog/wp-includes/feed.php

2014/11/30 2015/01/29

/blog/wp-includes/feed.php

関数　get_bloginfo_rss()

<?php
/**
 * WordPress Feed API
 *
 * Many of the functions used in here belong in The Loop, or The Loop for the
 * Feeds.
 *
 * @package WordPress
 * @subpackage Feed
 */

/**
 * RSS container for the bloginfo function.
 *
 * You can retrieve anything that you can using the get_bloginfo() function.
 * Everything will be stripped of tags and characters converted, when the values
 * are retrieved for use in the feeds.
 *
 * @since 1.5.1
 * @see get_bloginfo() For the list of possible values to display.
 *
 * @param string $show See get_bloginfo() for possible values.
 * @return string
 */
function get_bloginfo_rss($show = '') {
	$info = strip_tags(get_bloginfo($show));
	/**
	 * Filter the bloginfo for use in RSS feeds.
	 *
	 * @since 2.2.0
	 *
	 * @see convert_chars()
	 * @see get_bloginfo()
	 *
	 * @param string $info Converted string value of the blog information.
	 * @param string $show The type of blog information to retrieve.
	 */
	return apply_filters( 'get_bloginfo_rss', convert_chars( $info ), $show );
}

<?php

/**

* WordPress Feed API

* Many of the functions used in here belong in The Loop, or The Loop for the

* Feeds.

* @package WordPress

* @subpackage Feed

/**

* RSS container for the bloginfo function.

* You can retrieve anything that you can using the get_bloginfo() function.

* Everything will be stripped of tags and characters converted, when the values

* are retrieved for use in the feeds.

* @since 1.5.1

* @see get_bloginfo() For the list of possible values to display.

* @param string $show See get_bloginfo() for possible values.

* @return string

function get_bloginfo_rss($show = '') {

$info = strip_tags(get_bloginfo($show));

/**

* Filter the bloginfo for use in RSS feeds.

* @since 2.2.0

* @see convert_chars()

* @see get_bloginfo()

* @param string $info Converted string value of the blog information.

* @param string $show The type of blog information to retrieve.

return apply_filters( 'get_bloginfo_rss', convert_chars( $info ), $show );

}

関数　bloginfo_rss()

/**
 * Display RSS container for the bloginfo function.
 *
 * You can retrieve anything that you can using the get_bloginfo() function.
 * Everything will be stripped of tags and characters converted, when the values
 * are retrieved for use in the feeds.
 *
 * @since 0.71
 * @see get_bloginfo() For the list of possible values to display.
 *
 * @param string $show See get_bloginfo() for possible values.
 */
function bloginfo_rss($show = '') {
	/**
	 * Filter the bloginfo for display in RSS feeds.
	 *
	 * @since 2.1.0
	 *
	 * @see get_bloginfo()
	 *
	 * @param string $rss_container RSS container for the blog information.
	 * @param string $show          The type of blog information to retrieve.
	 */
	echo apply_filters( 'bloginfo_rss', get_bloginfo_rss( $show ), $show );
}

/**

* Display RSS container for the bloginfo function.

* You can retrieve anything that you can using the get_bloginfo() function.

* Everything will be stripped of tags and characters converted, when the values

* are retrieved for use in the feeds.

* @since 0.71

* @see get_bloginfo() For the list of possible values to display.

* @param string $show See get_bloginfo() for possible values.

function bloginfo_rss($show = '') {

/**

* Filter the bloginfo for display in RSS feeds.

* @since 2.1.0

* @see get_bloginfo()

* @param string $rss_container RSS container for the blog information.

* @param string $show The type of blog information to retrieve.

echo apply_filters( 'bloginfo_rss', get_bloginfo_rss( $show ), $show );

}

関数　get_default_feed()

/**
 * Retrieve the default feed.
 *
 * The default feed is 'rss2', unless a plugin changes it through the
 * 'default_feed' filter.
 *
 * @since 2.5.0
 * @uses apply_filters() Calls 'default_feed' hook on the default feed string.
 *
 * @return string Default feed, or for example 'rss2', 'atom', etc.
 */
function get_default_feed() {
	/**
	 * Filter the default feed type.
	 *
	 * @since 2.5.0
	 *
	 * @param string $feed_type Type of default feed. Possible values include 'rss2', 'atom'.
	 *                          Default 'rss2'.
	 */
	$default_feed = apply_filters( 'default_feed', 'rss2' );
	return 'rss' == $default_feed ? 'rss2' : $default_feed;
}

/**

* Retrieve the default feed.

* The default feed is 'rss2', unless a plugin changes it through the

* 'default_feed' filter.

* @since 2.5.0

* @uses apply_filters() Calls 'default_feed' hook on the default feed string.

* @return string Default feed, or for example 'rss2', 'atom', etc.

function get_default_feed() {

/**

* Filter the default feed type.

* @since 2.5.0

* @param string $feed_type Type of default feed. Possible values include 'rss2', 'atom'.

* Default 'rss2'.

$default_feed = apply_filters( 'default_feed', 'rss2' );

return 'rss' == $default_feed ? 'rss2' : $default_feed;

}

関数　get_wp_title_rss()

/**
 * Retrieve the blog title for the feed title.
 *
 * @since 2.2.0
 *
 * @param string $sep Optional. How to separate the title. See wp_title() for more info.
 * @return string Error message on failure or blog title on success.
 */
function get_wp_title_rss( $sep = '&#187;' ) {
	$title = wp_title( $sep, false );

	if ( is_wp_error( $title ) ) {
		return $title->get_error_message();
	}

	if ( $title && $sep && ' ' !== substr( $title, 0, 1 ) ) {
		$title = " $sep " . $title;
	}

	/**
	 * Filter the blog title for use as the feed title.
	 *
	 * @since 2.2.0
	 *
	 * @param string $title The current blog title.
	 * @param string $sep   Separator used by wp_title().
	 */
	$title = apply_filters( 'get_wp_title_rss', $title, $sep );
	return $title;
}

/**

* Retrieve the blog title for the feed title.

* @since 2.2.0

* @param string $sep Optional. How to separate the title. See wp_title() for more info.

* @return string Error message on failure or blog title on success.

function get_wp_title_rss( $sep = '»' ) {

$title = wp_title( $sep, false );

if ( is_wp_error( $title ) ) {

return $title->get_error_message();

}

if ( $title && $sep && ' ' !== substr( $title, 0, 1 ) ) {

$title = " $sep " . $title;

}

/**

* Filter the blog title for use as the feed title.

* @since 2.2.0

* @param string $title The current blog title.

* @param string $sep Separator used by wp_title().

$title = apply_filters( 'get_wp_title_rss', $title, $sep );

return $title;

}

関数　 wp_title_rss()

/**
 * Display the blog title for display of the feed title.
 *
 * @since 2.2.0
 * @see wp_title() $sep parameter usage.
 *
 * @param string $sep Optional.
 */
function wp_title_rss( $sep = '&#187;' ) {
	/**
	 * Filter the blog title for display of the feed title.
	 *
	 * @since 2.2.0
	 *
	 * @see get_wp_title_rss()
	 *
	 * @param string $wp_title The current blog title.
	 * @param string $sep      Separator used by wp_title().
	 */
	echo apply_filters( 'wp_title_rss', get_wp_title_rss( $sep ), $sep );
}

/**

* Display the blog title for display of the feed title.

* @since 2.2.0

* @see wp_title() $sep parameter usage.

* @param string $sep Optional.

function wp_title_rss( $sep = '»' ) {

/**

* Filter the blog title for display of the feed title.

* @since 2.2.0

* @see get_wp_title_rss()

* @param string $wp_title The current blog title.

* @param string $sep Separator used by wp_title().

echo apply_filters( 'wp_title_rss', get_wp_title_rss( $sep ), $sep );

}

関数　get_the_title_rss()

/**
 * Retrieve the current post title for the feed.
 *
 * @since 2.0.0
 *
 * @return string Current post title.
 */
function get_the_title_rss() {
	$title = get_the_title();
	/**
	 * Filter the post title for use in a feed.
	 *
	 * @since 1.2.0
	 *
	 * @param string $title The current post title.
	 */
	$title = apply_filters( 'the_title_rss', $title );
	return $title;
}

/**

* Retrieve the current post title for the feed.

* @since 2.0.0

* @return string Current post title.

function get_the_title_rss() {

$title = get_the_title();

/**

* Filter the post title for use in a feed.

* @since 1.2.0

* @param string $title The current post title.

$title = apply_filters( 'the_title_rss', $title );

return $title;

}

関数　the_title_rss()

/**
 * Display the post title in the feed.
 *
 * @since 0.71
 * @uses get_the_title_rss() Used to retrieve current post title.
 */
function the_title_rss() {
	echo get_the_title_rss();
}

/**

* Display the post title in the feed.

* @since 0.71

* @uses get_the_title_rss() Used to retrieve current post title.

function the_title_rss() {

echo get_the_title_rss();

}

関数　get_the_content_feed()

/**
 * Retrieve the post content for feeds.
 *
 * @since 2.9.0
 * @see get_the_content()
 *
 * @param string $feed_type The type of feed. rss2 | atom | rss | rdf
 * @return string The filtered content.
 */
function get_the_content_feed($feed_type = null) {
	if ( !$feed_type )
		$feed_type = get_default_feed();

	/** This filter is documented in wp-includes/post-template.php */
	$content = apply_filters( 'the_content', get_the_content() );
	$content = str_replace(']]>', ']]&gt;', $content);
	/**
	 * Filter the post content for use in feeds.
	 *
	 * @since 2.9.0
	 *
	 * @param string $content   The current post content.
	 * @param string $feed_type Type of feed. Possible values include 'rss2', 'atom'.
	 *                          Default 'rss2'.
	 */
	return apply_filters( 'the_content_feed', $content, $feed_type );
}

/**

* Retrieve the post content for feeds.

* @since 2.9.0

* @see get_the_content()

* @param string $feed_type The type of feed. rss2 | atom | rss | rdf

* @return string The filtered content.

function get_the_content_feed($feed_type = null) {

if ( !$feed_type )

$feed_type = get_default_feed();

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

$content = apply_filters( 'the_content', get_the_content() );

$content = str_replace(']]>', ']]>', $content);

/**

* Filter the post content for use in feeds.

* @since 2.9.0

* @param string $content The current post content.

* @param string $feed_type Type of feed. Possible values include 'rss2', 'atom'.

* Default 'rss2'.

return apply_filters( 'the_content_feed', $content, $feed_type );

}

関数　the_content_feed()

/**
 * Display the post content for feeds.
 *
 * @since 2.9.0
 * @uses apply_filters() Calls 'the_content_feed' on the content before processing.
 * @see get_the_content()
 *
 * @param string $feed_type The type of feed. rss2 | atom | rss | rdf
 */
function the_content_feed($feed_type = null) {
	echo get_the_content_feed($feed_type);
}

/**

* Display the post content for feeds.

* @since 2.9.0

* @uses apply_filters() Calls 'the_content_feed' on the content before processing.

* @see get_the_content()

* @param string $feed_type The type of feed. rss2 | atom | rss | rdf

function the_content_feed($feed_type = null) {

echo get_the_content_feed($feed_type);

}

関数　the_excerpt_rss()

/**
 * Display the post excerpt for the feed.
 *
 * @since 0.71
 */
function the_excerpt_rss() {
	$output = get_the_excerpt();
	/**
	 * Filter the post excerpt for a feed.
	 *
	 * @since 1.2.0
	 *
	 * @param string $output The current post excerpt.
	 */
	echo apply_filters( 'the_excerpt_rss', $output );
}

/**

* Display the post excerpt for the feed.

* @since 0.71

function the_excerpt_rss() {

$output = get_the_excerpt();

/**

* Filter the post excerpt for a feed.

* @since 1.2.0

* @param string $output The current post excerpt.

echo apply_filters( 'the_excerpt_rss', $output );

}

関数　the_permalink_rss()

/**
 * Display the permalink to the post for use in feeds.
 *
 * @since 2.3.0
 */
function the_permalink_rss() {
	/**
	 * Filter the permalink to the post for use in feeds.
	 *
	 * @since 2.3.0
	 *
	 * @param string $post_permalink The current post permalink.
	 */
	echo esc_url( apply_filters( 'the_permalink_rss', get_permalink() ) );
}

/**

* Display the permalink to the post for use in feeds.

* @since 2.3.0

function the_permalink_rss() {

/**

* Filter the permalink to the post for use in feeds.

* @since 2.3.0

* @param string $post_permalink The current post permalink.

echo esc_url( apply_filters( 'the_permalink_rss', get_permalink() ) );

}

関数　comments_link_feed()

/**
 * Outputs the link to the comments for the current post in an xml safe way
 *
 * @since 3.0.0
 * @return none
 */
function comments_link_feed() {
	/**
	 * Filter the comments permalink for the current post.
	 *
	 * @since 3.6.0
	 *
	 * @param string $comment_permalink The current comment permalink with
	 *                                  '#comments' appended.
	 */
	echo esc_url( apply_filters( 'comments_link_feed', get_comments_link() ) );
}

/**

* Outputs the link to the comments for the current post in an xml safe way

* @since 3.0.0

* @return none

function comments_link_feed() {

/**

* Filter the comments permalink for the current post.

* @since 3.6.0

* @param string $comment_permalink The current comment permalink with

* '#comments' appended.

echo esc_url( apply_filters( 'comments_link_feed', get_comments_link() ) );

}

関数　comment_guid()

/**
 * Display the feed GUID for the current comment.
 *
 * @since 2.5.0
 *
 * @param int|object $comment_id Optional comment object or id. Defaults to global comment object.
 */
function comment_guid($comment_id = null) {
	echo esc_url( get_comment_guid($comment_id) );
}

/**

* Display the feed GUID for the current comment.

* @since 2.5.0

* @param int|object $comment_id Optional comment object or id. Defaults to global comment object.

function comment_guid($comment_id = null) {

echo esc_url( get_comment_guid($comment_id) );

}

関数　get_comment_guid()

/**
 * Retrieve the feed GUID for the current comment.
 *
 * @since 2.5.0
 *
 * @param int|object $comment_id Optional comment object or id. Defaults to global comment object.
 * @return bool|string false on failure or guid for comment on success.
 */
function get_comment_guid($comment_id = null) {
	$comment = get_comment($comment_id);

	if ( !is_object($comment) )
		return false;

	return get_the_guid($comment->comment_post_ID) . '#comment-' . $comment->comment_ID;
}

/**

* Retrieve the feed GUID for the current comment.

* @since 2.5.0

* @param int|object $comment_id Optional comment object or id. Defaults to global comment object.

* @return bool|string false on failure or guid for comment on success.

function get_comment_guid($comment_id = null) {

$comment = get_comment($comment_id);

if ( !is_object($comment) )

return false;

return get_the_guid($comment->comment_post_ID) . '#comment-' . $comment->comment_ID;

}

関数　comment_link()

/**
 * Display the link to the comments.
 *
 * @since 1.5.0
 */
function comment_link() {
	/**
	 * Filter the current comment's permalink.
	 *
	 * @since 3.6.0
	 *
	 * @see get_comment_link()
	 *
	 * @param string $comment_permalink The current comment permalink.
	 */
	echo esc_url( apply_filters( 'comment_link', get_comment_link() ) );
}

/**

* Display the link to the comments.

* @since 1.5.0

function comment_link() {

/**

* Filter the current comment's permalink.

* @since 3.6.0

* @see get_comment_link()

* @param string $comment_permalink The current comment permalink.

echo esc_url( apply_filters( 'comment_link', get_comment_link() ) );

}

関数　get_comment_author_rss()

/**
 * Retrieve the current comment author for use in the feeds.
 *
 * @since 2.0.0
 * @uses get_comment_author()
 *
 * @return string Comment Author
 */
function get_comment_author_rss() {
	/**
	 * Filter the current comment author for use in a feed.
	 *
	 * @since 1.5.0
	 *
	 * @see get_comment_author()
	 *
	 * @param string $comment_author The current comment author.
	 */
	return apply_filters( 'comment_author_rss', get_comment_author() );
}

/**

* Retrieve the current comment author for use in the feeds.

* @since 2.0.0

* @uses get_comment_author()

* @return string Comment Author

function get_comment_author_rss() {

/**

* Filter the current comment author for use in a feed.

* @since 1.5.0

* @see get_comment_author()

* @param string $comment_author The current comment author.

return apply_filters( 'comment_author_rss', get_comment_author() );

}

関数　comment_author_rss()

/**
 * Display the current comment author in the feed.
 *
 * @since 1.0.0
 */
function comment_author_rss() {
	echo get_comment_author_rss();
}

/**

* Display the current comment author in the feed.

* @since 1.0.0

function comment_author_rss() {

echo get_comment_author_rss();

}

関数　comment_text_rss()

/**
 * Display the current comment content for use in the feeds.
 *
 * @since 1.0.0
 * @uses get_comment_text()
 */
function comment_text_rss() {
	$comment_text = get_comment_text();
	/**
	 * Filter the current comment content for use in a feed.
	 *
	 * @since 1.5.0
	 *
	 * @param string $comment_text The content of the current comment.
	 */
	$comment_text = apply_filters( 'comment_text_rss', $comment_text );
	echo $comment_text;
}

/**

* Display the current comment content for use in the feeds.

* @since 1.0.0

* @uses get_comment_text()

function comment_text_rss() {

$comment_text = get_comment_text();

/**

* Filter the current comment content for use in a feed.

* @since 1.5.0

* @param string $comment_text The content of the current comment.

$comment_text = apply_filters( 'comment_text_rss', $comment_text );

echo $comment_text;

}

関数　get_the_category_rss()

/**
 * Retrieve all of the post categories, formatted for use in feeds.
 *
 * All of the categories for the current post in the feed loop, will be
 * retrieved and have feed markup added, so that they can easily be added to the
 * RSS2, Atom, or RSS1 and RSS0.91 RDF feeds.
 *
 * @since 2.1.0
 *
 * @param string $type Optional, default is the type returned by get_default_feed().
 * @return string All of the post categories for displaying in the feed.
 */
function get_the_category_rss($type = null) {
	if ( empty($type) )
		$type = get_default_feed();
	$categories = get_the_category();
	$tags = get_the_tags();
	$the_list = '';
	$cat_names = array();

	$filter = 'rss';
	if ( 'atom' == $type )
		$filter = 'raw';

	if ( !empty($categories) ) foreach ( (array) $categories as $category ) {
		$cat_names[] = sanitize_term_field('name', $category->name, $category->term_id, 'category', $filter);
	}

	if ( !empty($tags) ) foreach ( (array) $tags as $tag ) {
		$cat_names[] = sanitize_term_field('name', $tag->name, $tag->term_id, 'post_tag', $filter);
	}

	$cat_names = array_unique($cat_names);

	foreach ( $cat_names as $cat_name ) {
		if ( 'rdf' == $type )
			$the_list .= "\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
		elseif ( 'atom' == $type )
			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( get_bloginfo_rss( 'url' ) ), esc_attr( $cat_name ) );
		else
			$the_list .= "\t\t<category><![CDATA[" . @html_entity_decode( $cat_name, ENT_COMPAT, get_option('blog_charset') ) . "]]></category>\n";
	}

	/**
	 * Filter all of the post categories for display in a feed.
	 *
	 * @since 1.2.0
	 *
	 * @param string $the_list All of the RSS post categories.
	 * @param string $type     Type of feed. Possible values include 'rss2', 'atom'.
	 *                         Default 'rss2'.
	 */
	return apply_filters( 'the_category_rss', $the_list, $type );
}

/**

* Retrieve all of the post categories, formatted for use in feeds.

* All of the categories for the current post in the feed loop, will be

* retrieved and have feed markup added, so that they can easily be added to the

* RSS2, Atom, or RSS1 and RSS0.91 RDF feeds.

* @since 2.1.0

* @param string $type Optional, default is the type returned by get_default_feed().

* @return string All of the post categories for displaying in the feed.

function get_the_category_rss($type = null) {

if ( empty($type) )

$type = get_default_feed();

$categories = get_the_category();

$tags = get_the_tags();

$the_list = '';

$cat_names = array();

$filter = 'rss';

if ( 'atom' == $type )

$filter = 'raw';

if ( !empty($categories) ) foreach ( (array) $categories as $category ) {

$cat_names[] = sanitize_term_field('name', $category->name, $category->term_id, 'category', $filter);

}

if ( !empty($tags) ) foreach ( (array) $tags as $tag ) {

$cat_names[] = sanitize_term_field('name', $tag->name, $tag->term_id, 'post_tag', $filter);

}

$cat_names = array_unique($cat_names);

foreach ( $cat_names as $cat_name ) {

if ( 'rdf' == $type )

$the_list .= "\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";

elseif ( 'atom' == $type )

$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( get_bloginfo_rss( 'url' ) ), esc_attr( $cat_name ) );

else

$the_list .= "\t\t<category><![CDATA[" . @html_entity_decode( $cat_name, ENT_COMPAT, get_option('blog_charset') ) . "]]></category>\n";

}

/**

* Filter all of the post categories for display in a feed.

* @since 1.2.0

* @param string $the_list All of the RSS post categories.

* @param string $type Type of feed. Possible values include 'rss2', 'atom'.

* Default 'rss2'.

return apply_filters( 'the_category_rss', $the_list, $type );

}

関数　the_category_rss()

/**
 * Display the post categories in the feed.
 *
 * @since 0.71
 * @see get_the_category_rss() For better explanation.
 *
 * @param string $type Optional, default is the type returned by get_default_feed().
 */
function the_category_rss($type = null) {
	echo get_the_category_rss($type);
}

/**

* Display the post categories in the feed.

* @since 0.71

* @see get_the_category_rss() For better explanation.

* @param string $type Optional, default is the type returned by get_default_feed().

function the_category_rss($type = null) {

echo get_the_category_rss($type);

}

関数　html_type_rss()

/**
 * Display the HTML type based on the blog setting.
 *
 * The two possible values are either 'xhtml' or 'html'.
 *
 * @since 2.2.0
 */
function html_type_rss() {
	$type = get_bloginfo('html_type');
	if (strpos($type, 'xhtml') !== false)
		$type = 'xhtml';
	else
		$type = 'html';
	echo $type;
}

/**

* Display the HTML type based on the blog setting.

* The two possible values are either 'xhtml' or 'html'.

* @since 2.2.0

function html_type_rss() {

$type = get_bloginfo('html_type');

if (strpos($type, 'xhtml') !== false)

$type = 'xhtml';

else

$type = 'html';

echo $type;

}

関数　rss_enclosure()

/**
 * Display the rss enclosure for the current post.
 *
 * Uses the global $post to check whether the post requires a password and if
 * the user has the password for the post. If not then it will return before
 * displaying.
 *
 * Also uses the function get_post_custom() to get the post's 'enclosure'
 * metadata field and parses the value to display the enclosure(s). The
 * enclosure(s) consist of enclosure HTML tag(s) with a URI and other
 * attributes.
 *
 * @since 1.5.0
 * @uses get_post_custom() To get the current post enclosure metadata.
 */
function rss_enclosure() {
	if ( post_password_required() )
		return;

	foreach ( (array) get_post_custom() as $key => $val) {
		if ($key == 'enclosure') {
			foreach ( (array) $val as $enc ) {
				$enclosure = explode("\n", $enc);

				// only get the first element, e.g. audio/mpeg from 'audio/mpeg mpga mp2 mp3'
				$t = preg_split('/[ \t]/', trim($enclosure[2]) );
				$type = $t[0];

				/**
				 * Filter the RSS enclosure HTML link tag for the current post.
				 *
				 * @since 2.2.0
				 *
				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
				 */
				echo apply_filters( 'rss_enclosure', '<enclosure url="' . trim( htmlspecialchars( $enclosure[0] ) ) . '" length="' . trim( $enclosure[1] ) . '" type="' . $type . '" />' . "\n" );
			}
		}
	}
}

/**

* Display the rss enclosure for the current post.

* Uses the global $post to check whether the post requires a password and if

* the user has the password for the post. If not then it will return before

* displaying.

* Also uses the function get_post_custom() to get the post's 'enclosure'

* metadata field and parses the value to display the enclosure(s). The

* enclosure(s) consist of enclosure HTML tag(s) with a URI and other

* attributes.

* @since 1.5.0

* @uses get_post_custom() To get the current post enclosure metadata.

function rss_enclosure() {

if ( post_password_required() )

return;

foreach ( (array) get_post_custom() as $key => $val) {

if ($key == 'enclosure') {

foreach ( (array) $val as $enc ) {

$enclosure = explode("\n", $enc);

// only get the first element, e.g. audio/mpeg from 'audio/mpeg mpga mp2 mp3'

$t = preg_split('/[ \t]/', trim($enclosure[2]) );

$type = $t[0];

/**

* Filter the RSS enclosure HTML link tag for the current post.

* @since 2.2.0

* @param string $html_link_tag The HTML link tag with a URI and other attributes.

echo apply_filters( 'rss_enclosure', '<enclosure url="' . trim( htmlspecialchars( $enclosure[0] ) ) . '" length="' . trim( $enclosure[1] ) . '" type="' . $type . '" />' . "\n" );

}

関数　atom_enclosure()

/**
 * Display the atom enclosure for the current post.
 *
 * Uses the global $post to check whether the post requires a password and if
 * the user has the password for the post. If not then it will return before
 * displaying.
 *
 * Also uses the function get_post_custom() to get the post's 'enclosure'
 * metadata field and parses the value to display the enclosure(s). The
 * enclosure(s) consist of link HTML tag(s) with a URI and other attributes.
 *
 * @since 2.2.0
 * @uses get_post_custom() To get the current post enclosure metadata.
 */
function atom_enclosure() {
	if ( post_password_required() )
		return;

	foreach ( (array) get_post_custom() as $key => $val ) {
		if ($key == 'enclosure') {
			foreach ( (array) $val as $enc ) {
				$enclosure = explode("\n", $enc);
				/**
				 * Filter the atom enclosure HTML link tag for the current post.
				 *
				 * @since 2.2.0
				 *
				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
				 */
				echo apply_filters( 'atom_enclosure', '<link href="' . trim( htmlspecialchars( $enclosure[0] ) ) . '" rel="enclosure" length="' . trim( $enclosure[1] ) . '" type="' . trim( $enclosure[2] ) . '" />' . "\n" );
			}
		}
	}
}

/**

* Display the atom enclosure for the current post.

* Uses the global $post to check whether the post requires a password and if

* the user has the password for the post. If not then it will return before

* displaying.

* Also uses the function get_post_custom() to get the post's 'enclosure'

* metadata field and parses the value to display the enclosure(s). The

* enclosure(s) consist of link HTML tag(s) with a URI and other attributes.

* @since 2.2.0

* @uses get_post_custom() To get the current post enclosure metadata.

function atom_enclosure() {

if ( post_password_required() )

return;

foreach ( (array) get_post_custom() as $key => $val ) {

if ($key == 'enclosure') {

foreach ( (array) $val as $enc ) {

$enclosure = explode("\n", $enc);

/**

* Filter the atom enclosure HTML link tag for the current post.

* @since 2.2.0

* @param string $html_link_tag The HTML link tag with a URI and other attributes.

echo apply_filters( 'atom_enclosure', '<link href="' . trim( htmlspecialchars( $enclosure[0] ) ) . '" rel="enclosure" length="' . trim( $enclosure[1] ) . '" type="' . trim( $enclosure[2] ) . '" />' . "\n" );

}

関数　prep_atom_text_construct()

/**
 * Determine the type of a string of data with the data formatted.
 *
 * Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1.
 *
 * In the case of WordPress, text is defined as containing no markup,
 * xhtml is defined as "well formed", and html as tag soup (i.e., the rest).
 *
 * Container div tags are added to xhtml values, per section 3.1.1.3.
 *
 * @link http://www.atomenabled.org/developers/syndication/atom-format-spec.php#rfc.section.3.1
 *
 * @since 2.5.0
 *
 * @param string $data Input string
 * @return array array(type, value)
 */
function prep_atom_text_construct($data) {
	if (strpos($data, '<') === false && strpos($data, '&') === false) {
		return array('text', $data);
	}

	$parser = xml_parser_create();
	xml_parse($parser, '<div>' . $data . '</div>', true);
	$code = xml_get_error_code($parser);
	xml_parser_free($parser);

	if (!$code) {
		if (strpos($data, '<') === false) {
			return array('text', $data);
		} else {
			$data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";
			return array('xhtml', $data);
		}
	}

	if (strpos($data, ']]>') == false) {
		return array('html', "<![CDATA[$data]]>");
	} else {
		return array('html', htmlspecialchars($data));
	}
}

/**

* Determine the type of a string of data with the data formatted.

* Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1.

* In the case of WordPress, text is defined as containing no markup,

* xhtml is defined as "well formed", and html as tag soup (i.e., the rest).

* Container div tags are added to xhtml values, per section 3.1.1.3.

* @link http://www.atomenabled.org/developers/syndication/atom-format-spec.php#rfc.section.3.1

* @since 2.5.0

* @param string $data Input string

* @return array array(type, value)

function prep_atom_text_construct($data) {

if (strpos($data, '<') === false && strpos($data, '&') === false) {

return array('text', $data);

}

$parser = xml_parser_create();

xml_parse($parser, '<div>' . $data . '</div>', true);

$code = xml_get_error_code($parser);

xml_parser_free($parser);

if (!$code) {

if (strpos($data, '<') === false) {

return array('text', $data);

} else {

$data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";

return array('xhtml', $data);

}

if (strpos($data, ']]>') == false) {

return array('html', "<![CDATA[$data]]>");

} else {

return array('html', htmlspecialchars($data));

}

関数　self_link()

/**
 * Display the link for the currently displayed feed in a XSS safe way.
 *
 * Generate a correct link for the atom:self element.
 *
 * @since 2.5.0
 */
function self_link() {
	$host = @parse_url(home_url());
	/**
	 * Filter the current feed URL.
	 *
	 * @since 3.6.0
	 *
	 * @see set_url_scheme()
	 * @see wp_unslash()
	 *
	 * @param string $feed_link The link for the feed with set URL scheme.
	 */
	echo esc_url( apply_filters( 'self_link', set_url_scheme( 'http://' . $host['host'] . wp_unslash( $_SERVER['REQUEST_URI'] ) ) ) );
}

/**

* Display the link for the currently displayed feed in a XSS safe way.

* Generate a correct link for the atom:self element.

* @since 2.5.0

function self_link() {

$host = @parse_url(home_url());

/**

* Filter the current feed URL.

* @since 3.6.0

* @see set_url_scheme()

* @see wp_unslash()

* @param string $feed_link The link for the feed with set URL scheme.

echo esc_url( apply_filters( 'self_link', set_url_scheme( 'http://' . $host['host'] . wp_unslash( $_SERVER['REQUEST_URI'] ) ) ) );

}

関数　feed_content_type()

/**
 * Return the content type for specified feed type.
 *
 * @since 2.8.0
 */
function feed_content_type( $type = '' ) {
	if ( empty($type) )
		$type = get_default_feed();

	$types = array(
		'rss'  => 'application/rss+xml',
		'rss2' => 'application/rss+xml',
		'rss-http'  => 'text/xml',
		'atom' => 'application/atom+xml',
		'rdf'  => 'application/rdf+xml'
	);

	$content_type = ( !empty($types[$type]) ) ? $types[$type] : 'application/octet-stream';

	/**
	 * Filter the content type for a specific feed type.
	 *
	 * @since 2.8.0
	 *
	 * @param string $content_type Content type indicating the type of data that a feed contains.
	 * @param string $type         Type of feed. Possible values include 'rss2', 'atom'.
	 *                             Default 'rss2'.
	 */
	return apply_filters( 'feed_content_type', $content_type, $type );
}

/**

* Return the content type for specified feed type.

* @since 2.8.0

function feed_content_type( $type = '' ) {

if ( empty($type) )

$type = get_default_feed();

$types = array(

'rss' => 'application/rss+xml',

'rss2' => 'application/rss+xml',

'rss-http' => 'text/xml',

'atom' => 'application/atom+xml',

'rdf' => 'application/rdf+xml'

);

$content_type = ( !empty($types[$type]) ) ? $types[$type] : 'application/octet-stream';

/**

* Filter the content type for a specific feed type.

* @since 2.8.0

* @param string $content_type Content type indicating the type of data that a feed contains.

* @param string $type Type of feed. Possible values include 'rss2', 'atom'.

* Default 'rss2'.

return apply_filters( 'feed_content_type', $content_type, $type );

}

関数　fetch_feed()

/**
 * Build SimplePie object based on RSS or Atom feed from URL.
 *
 * @since 2.8.0
 *
 * @param mixed $url URL of feed to retrieve. If an array of URLs, the feeds are merged
 * using SimplePie's multifeed feature.
 * See also {@link http://simplepie.org/wiki/faq/typical_multifeed_gotchas}
 *
 * @return WP_Error|SimplePie WP_Error object on failure or SimplePie object on success
 */
function fetch_feed( $url ) {
	require_once( ABSPATH . WPINC . '/class-feed.php' );

	$feed = new SimplePie();

	$feed->set_sanitize_class( 'WP_SimplePie_Sanitize_KSES' );
	// We must manually overwrite $feed->sanitize because SimplePie's
	// constructor sets it before we have a chance to set the sanitization class
	$feed->sanitize = new WP_SimplePie_Sanitize_KSES();

	$feed->set_cache_class( 'WP_Feed_Cache' );
	$feed->set_file_class( 'WP_SimplePie_File' );

	$feed->set_feed_url( $url );
	/** This filter is documented in wp-includes/class-feed.php */
	$feed->set_cache_duration( apply_filters( 'wp_feed_cache_transient_lifetime', 12 * HOUR_IN_SECONDS, $url ) );
	/**
	 * Fires just before processing the SimplePie feed object.
	 *
	 * @since 3.0.0
	 *
	 * @param object &$feed SimplePie feed object, passed by reference.
	 * @param mixed  $url   URL of feed to retrieve. If an array of URLs, the feeds are merged.
	 */
	do_action_ref_array( 'wp_feed_options', array( &$feed, $url ) );
	$feed->init();
	$feed->handle_content_type();

	if ( $feed->error() )
		return new WP_Error( 'simplepie-error', $feed->error() );

	return $feed;
}

/**

* Build SimplePie object based on RSS or Atom feed from URL.

* @since 2.8.0

* @param mixed $url URL of feed to retrieve. If an array of URLs, the feeds are merged

* using SimplePie's multifeed feature.

* See also {@link http://simplepie.org/wiki/faq/typical_multifeed_gotchas}

* @return WP_Error|SimplePie WP_Error object on failure or SimplePie object on success

function fetch_feed( $url ) {

require_once( ABSPATH . WPINC . '/class-feed.php' );

$feed = new SimplePie();

$feed->set_sanitize_class( 'WP_SimplePie_Sanitize_KSES' );

// We must manually overwrite $feed->sanitize because SimplePie's

// constructor sets it before we have a chance to set the sanitization class

$feed->sanitize = new WP_SimplePie_Sanitize_KSES();

$feed->set_cache_class( 'WP_Feed_Cache' );

$feed->set_file_class( 'WP_SimplePie_File' );

$feed->set_feed_url( $url );

/** This filter is documented in wp-includes/class-feed.php */

$feed->set_cache_duration( apply_filters( 'wp_feed_cache_transient_lifetime', 12 * HOUR_IN_SECONDS, $url ) );

/**

* Fires just before processing the SimplePie feed object.

* @since 3.0.0

* @param object &$feed SimplePie feed object, passed by reference.

* @param mixed $url URL of feed to retrieve. If an array of URLs, the feeds are merged.

do_action_ref_array( 'wp_feed_options', array( &$feed, $url ) );

$feed->init();

$feed->handle_content_type();

if ( $feed->error() )

return new WP_Error( 'simplepie-error', $feed->error() );

return $feed;

}

- Wordpress

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WordPressを読む 48 /blog/wp-includes/feed.php

/blog/wp-includes/feed.php

WordPressを読む　48 /blog/wp-includes/feed.php