WordPressを読む　19 /blog/wp-includes/wp-db.php

2014/11/29 2014/12/09

1 定義ファイル　: /blog/wp-includes/wp-db.php
2 呼出元 : 関数　require_wp_db()
3 class wpdb定義
4 クラス　class wpdb
5 wpdb::クラス変数
6 wpdb:: __construct() コンストラクタ
7 wpdb::__destruct()　デストラクタ
8 wpdb::__get()
9 wpdb::__set()
10 wpdb:: __isset()
11 wpdb::__unset()
12 wpdb::init_charset()
13 wpdb::set_charset()
14 wpdb::set_sql_mode()
15 wpdb::set_prefix()
16 wpdb::set_blog_id()
17 wpdb::get_blog_prefix()
18 wpdb::tables()
19 wpdb::select()
20 wpdb::_weak_escape()
21 wpdb::_real_escape()
22 wpdb:: _escape()
23 wpdb::escape()
24 wpdb::escape_by_ref()
25 wpdb::prepare()
26 wpdb::esc_like()
27 wpdb::print_error()
28 wpdb::show_errors()
29 wpdb::hide_errors()
30 wpdb::suppress_errors()
31 wpdb::function flush()
32 wpdb::db_connect()
33 wpdb::check_connection()
34 wpdb::query()
35 wpdb::_do_query()
36 wpdb::insert()
37 wpdb::replace()
38 wpdb::_insert_replace_helper()
39 wpdb::update()
40 wpdb::delete()
41 wpdb::get_var()
42 wpdb::get_row()
43 wpdb::get_col()
44 wpdb::get_results()
45 wpdb::load_col_info()
46 wpdb::get_col_info()
47 wpdb::timer_start()
48 wpdb::timer_stop()
49 wpdb::bail()
50 wpdb::check_database_version()
51 wpdb::supports_collation()
52 wpdb::get_charset_collate()
53 wpdb::has_cap()
54 wpdb::get_caller()
55 wpdb::db_version()

定義ファイル　: /blog/wp-includes/wp-db.php

呼出元 : 関数　require_wp_db()

定数

class wpdb定義

<?php
/**
 * WordPress DB Class
 *
 * Original code from {@link http://php.justinvincent.com Justin Vincent (justin@visunet.ie)}

define( 'EZSQL_VERSION', 'WP1.25' );
define( 'OBJECT', 'OBJECT' );
define( 'object', 'OBJECT' ); // Back compat.
define( 'OBJECT_K', 'OBJECT_K' );
define( 'ARRAY_A', 'ARRAY_A' );
define( 'ARRAY_N', 'ARRAY_N' );

<?php

/**

* WordPress DB Class

* Original code from {@link http://php.justinvincent.com Justin Vincent (justin@visunet.ie)}

define( 'EZSQL_VERSION', 'WP1.25' );

define( 'OBJECT', 'OBJECT' );

define( 'object', 'OBJECT' ); // Back compat.

define( 'OBJECT_K', 'OBJECT_K' );

define( 'ARRAY_A', 'ARRAY_A' );

define( 'ARRAY_N', 'ARRAY_N' );

クラス　class wpdb

PHP5のクラス書式
定義ファイル : /blog/wp-includes/wp-db.php

wpdb::クラス変数

class wpdb {
	var $show_errors = false;
	var $suppress_errors = false;
	public $last_error = '';
	var $num_queries = 0;
	var $num_rows = 0;
	var $rows_affected = 0;
	var $insert_id = 0;
	var $last_query;
	var $last_result;
	protected $result;
	protected $col_info;
	var $queries;
	protected $reconnect_retries = 5;
	var $prefix = '';
        public $base_prefix;
	var $ready = false;
	public $blogid = 0;
	public $siteid = 0;
	var $tables = array( 'posts', 'comments', 'links', 'options', 'postmeta',
		'terms', 'term_taxonomy', 'term_relationships', 'commentmeta' );
	var $old_tables = array( 'categories', 'post2cat', 'link2cat' );
	var $global_tables = array( 'users', 'usermeta' );
	var $ms_global_tables = array( 'blogs', 'signups', 'site', 'sitemeta',
		'sitecategories', 'registration_log', 'blog_versions' );
	public $comments;
	public $commentmeta;
	public $links;
	public $options;
	public $postmeta;
	public $posts;
	public $terms;
	public $term_relationships;
	public $term_taxonomy;
	public $usermeta;
	public $users;
	public $blog_versions;
	public $registration_log;
	public $signups;
	public $site;
	public $sitecategories;
	public $sitemeta;
	public $field_types = array();
	public $charset;
	public $collate;
	protected $dbuser;
	protected $dbpassword;
	protected $dbname;
	protected $dbhost;
	protected $dbh;
	public $func_call;
	public $is_mysql = null;
	protected $incompatible_modes = array( 'NO_ZERO_DATE', 'ONLY_FULL_GROUP_BY',
		'STRICT_TRANS_TABLES', 'STRICT_ALL_TABLES', 'TRADITIONAL' );
	private $use_mysqli = false;
	private $has_connected = false;

class wpdb {

var $show_errors = false;

var $suppress_errors = false;

public $last_error = '';

var $num_queries = 0;

var $num_rows = 0;

var $rows_affected = 0;

var $insert_id = 0;

var $last_query;

var $last_result;

protected $result;

protected $col_info;

var $queries;

protected $reconnect_retries = 5;

var $prefix = '';

public $base_prefix;

var $ready = false;

public $blogid = 0;

public $siteid = 0;

var $tables = array( 'posts', 'comments', 'links', 'options', 'postmeta',

'terms', 'term_taxonomy', 'term_relationships', 'commentmeta' );

var $old_tables = array( 'categories', 'post2cat', 'link2cat' );

var $global_tables = array( 'users', 'usermeta' );

var $ms_global_tables = array( 'blogs', 'signups', 'site', 'sitemeta',

'sitecategories', 'registration_log', 'blog_versions' );

public $comments;

public $commentmeta;

public $links;

public $options;

public $postmeta;

public $posts;

public $terms;

public $term_relationships;

public $term_taxonomy;

public $usermeta;

public $users;

public $blog_versions;

public $registration_log;

public $signups;

public $site;

public $sitecategories;

public $sitemeta;

public $field_types = array();

public $charset;

public $collate;

protected $dbuser;

protected $dbpassword;

protected $dbname;

protected $dbhost;

protected $dbh;

public $func_call;

public $is_mysql = null;

protected $incompatible_modes = array( 'NO_ZERO_DATE', 'ONLY_FULL_GROUP_BY',

'STRICT_TRANS_TABLES', 'STRICT_ALL_TABLES', 'TRADITIONAL' );

private $use_mysqli = false;

private $has_connected = false;

メソッド

wpdb:: __construct() コンストラクタ

マジックメソッド__construct()

	public function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) {
		register_shutdown_function( array( $this, '__destruct' ) );
		if ( WP_DEBUG && WP_DEBUG_DISPLAY )
			$this->show_errors();

		if ( function_exists( 'mysqli_connect' ) ) {
			if ( defined( 'WP_USE_EXT_MYSQL' ) ) {
				$this->use_mysqli = ! WP_USE_EXT_MYSQL;
			} elseif ( version_compare( phpversion(), '5.5', '>=' ) || ! function_exists( 'mysql_connect' ) ) {
				$this->use_mysqli = true;
			} elseif ( false !== strpos( $GLOBALS['wp_version'], '-' ) ) {
				$this->use_mysqli = true;
			}
		}
		$this->init_charset();
		$this->dbuser = $dbuser;
		$this->dbpassword = $dbpassword;
		$this->dbname = $dbname;
		$this->dbhost = $dbhost;
		if ( defined( 'WP_SETUP_CONFIG' ) ) {
			return;
		}
		$this->db_connect();
	}

public function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) {

register_shutdown_function( array( $this, '__destruct' ) );

if ( WP_DEBUG && WP_DEBUG_DISPLAY )

$this->show_errors();

if ( function_exists( 'mysqli_connect' ) ) {

if ( defined( 'WP_USE_EXT_MYSQL' ) ) {

$this->use_mysqli = ! WP_USE_EXT_MYSQL;

} elseif ( version_compare( phpversion(), '5.5', '>=' ) || ! function_exists( 'mysql_connect' ) ) {

$this->use_mysqli = true;

} elseif ( false !== strpos( $GLOBALS['wp_version'], '-' ) ) {

$this->use_mysqli = true;

}

$this->init_charset();

$this->dbuser = $dbuser;

$this->dbpassword = $dbpassword;

$this->dbname = $dbname;

$this->dbhost = $dbhost;

if ( defined( 'WP_SETUP_CONFIG' ) ) {

return;

}

$this->db_connect();

}

メソッド

wpdb::__destruct()　デストラクタ

マジックメソッド_construct()

	public function __destruct() {
		return true;
	}

public function __destruct() {

return true;

}

メソッド

wpdb::__get()

マジックメソッド__construct()

オーバーロード

__get()　は、アクセス不能プロパティからデータを読み込む際に使用します。

	public function __get( $name ) {
		if ( 'col_info' == $name )
			$this->load_col_info();
		return $this->$name;
	}

public function __get( $name ) {

if ( 'col_info' == $name )

$this->load_col_info();

return $this->$name;

}

メソッド

wpdb::__set()

__set()　は、アクセス不能プロパティへデータを書き込む際に実行されます。

	public function __set( $name, $value ) {
		$this->$name = $value;
	}

public function __set( $name, $value ) {

$this->$name = $value;

}

メソッド

wpdb:: __isset()

__isset() isset() あるいは empty() をアクセス不能プロパティに対して実行したときに起動します。

	public function __isset( $name ) {
		return isset( $this->$name );
	}

public function __isset( $name ) {

return isset( $this->$name );

}

メソッド

wpdb::__unset()

__unset()　は、 unset() をアクセス不能プロパティに対して実行したときに起動します。

	public function __unset( $name ) {
		unset( $this->$name );
	}

public function __unset( $name ) {

unset( $this->$name );

}

メソッド

wpdb::init_charset()

	public function init_charset() {
		if ( function_exists('is_multisite') && is_multisite() ) {
			$this->charset = 'utf8';
			if ( defined( 'DB_COLLATE' ) && DB_COLLATE )
				$this->collate = DB_COLLATE;
			else
				$this->collate = 'utf8_general_ci';
		} elseif ( defined( 'DB_COLLATE' ) ) {
			$this->collate = DB_COLLATE;
		}

		if ( defined( 'DB_CHARSET' ) )
			$this->charset = DB_CHARSET;
	}

public function init_charset() {

if ( function_exists('is_multisite') && is_multisite() ) {

$this->charset = 'utf8';

if ( defined( 'DB_COLLATE' ) && DB_COLLATE )

$this->collate = DB_COLLATE;

else

$this->collate = 'utf8_general_ci';

} elseif ( defined( 'DB_COLLATE' ) ) {

$this->collate = DB_COLLATE;

}

if ( defined( 'DB_CHARSET' ) )

$this->charset = DB_CHARSET;

}

メソッド

wpdb::set_charset()

	public function set_charset( $dbh, $charset = null, $collate = null ) {
		if ( ! isset( $charset ) )
			$charset = $this->charset;
		if ( ! isset( $collate ) )
			$collate = $this->collate;
		if ( $this->has_cap( 'collation' ) && ! empty( $charset ) ) {
			if ( $this->use_mysqli ) {
				if ( function_exists( 'mysqli_set_charset' ) && $this->has_cap( 'set_charset' ) ) {
					mysqli_set_charset( $dbh, $charset );
				} else {
					$query = $this->prepare( 'SET NAMES %s', $charset );
					if ( ! empty( $collate ) )
						$query .= $this->prepare( ' COLLATE %s', $collate );
					mysqli_query( $query, $dbh );
				}
			} else {
				if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset' ) ) {
					mysql_set_charset( $charset, $dbh );
				} else {
					$query = $this->prepare( 'SET NAMES %s', $charset );
					if ( ! empty( $collate ) )
						$query .= $this->prepare( ' COLLATE %s', $collate );
					mysql_query( $query, $dbh );
				}
			}
		}
	}

public function set_charset( $dbh, $charset = null, $collate = null ) {

if ( ! isset( $charset ) )

$charset = $this->charset;

if ( ! isset( $collate ) )

$collate = $this->collate;

if ( $this->has_cap( 'collation' ) && ! empty( $charset ) ) {

if ( $this->use_mysqli ) {

if ( function_exists( 'mysqli_set_charset' ) && $this->has_cap( 'set_charset' ) ) {

mysqli_set_charset( $dbh, $charset );

} else {

$query = $this->prepare( 'SET NAMES %s', $charset );

if ( ! empty( $collate ) )

$query .= $this->prepare( ' COLLATE %s', $collate );

mysqli_query( $query, $dbh );

}

} else {

if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset' ) ) {

mysql_set_charset( $charset, $dbh );

} else {

$query = $this->prepare( 'SET NAMES %s', $charset );

if ( ! empty( $collate ) )

$query .= $this->prepare( ' COLLATE %s', $collate );

mysql_query( $query, $dbh );

}

メソッド

wpdb::set_sql_mode()

	public function set_sql_mode( $modes = array() ) {
		if ( empty( $modes ) ) {
			if ( $this->use_mysqli ) {
				$res = mysqli_query( $this->dbh, 'SELECT @@SESSION.sql_mode' );
			} else {
				$res = mysql_query( 'SELECT @@SESSION.sql_mode', $this->dbh );
			}

			if ( empty( $res ) ) {
				return;
			}

			if ( $this->use_mysqli ) {
				$modes_array = mysqli_fetch_array( $res );
				if ( empty( $modes_array[0] ) ) {
					return;
				}
				$modes_str = $modes_array[0];
			} else {
				$modes_str = mysql_result( $res, 0 );
			}

			if ( empty( $modes_str ) ) {
				return;
			}

			$modes = explode( ',', $modes_str );
		}

		$modes = array_change_key_case( $modes, CASE_UPPER );
		$incompatible_modes = (array) apply_filters( 'incompatible_sql_modes', $this->incompatible_modes );

		foreach( $modes as $i => $mode ) {
			if ( in_array( $mode, $incompatible_modes ) ) {
				unset( $modes[ $i ] );
			}
		}

		$modes_str = implode( ',', $modes );
		if ( $this->use_mysqli ) {
			mysqli_query( $this->dbh, "SET SESSION sql_mode='$modes_str'" );
		} else {
			mysql_query( "SET SESSION sql_mode='$modes_str'", $this->dbh );
		}
	}

public function set_sql_mode( $modes = array() ) {

if ( empty( $modes ) ) {

if ( $this->use_mysqli ) {

$res = mysqli_query( $this->dbh, 'SELECT @@SESSION.sql_mode' );

} else {

$res = mysql_query( 'SELECT @@SESSION.sql_mode', $this->dbh );

}

if ( empty( $res ) ) {

return;

}

if ( $this->use_mysqli ) {

$modes_array = mysqli_fetch_array( $res );

if ( empty( $modes_array[0] ) ) {

return;

}

$modes_str = $modes_array[0];

} else {

$modes_str = mysql_result( $res, 0 );

}

if ( empty( $modes_str ) ) {

return;

}

$modes = explode( ',', $modes_str );

}

$modes = array_change_key_case( $modes, CASE_UPPER );

$incompatible_modes = (array) apply_filters( 'incompatible_sql_modes', $this->incompatible_modes );

foreach( $modes as $i => $mode ) {

if ( in_array( $mode, $incompatible_modes ) ) {

unset( $modes[ $i ] );

}

$modes_str = implode( ',', $modes );

if ( $this->use_mysqli ) {

mysqli_query( $this->dbh, "SET SESSION sql_mode='$modes_str'" );

} else {

mysql_query( "SET SESSION sql_mode='$modes_str'", $this->dbh );

}

メソッド

wpdb::set_prefix()

	public function set_prefix( $prefix, $set_table_names = true ) {
		if ( preg_match( '|[^a-z0-9_]|i', $prefix ) )
			return new WP_Error('invalid_db_prefix', 'Invalid database prefix' );

		$old_prefix = is_multisite() ? '' : $prefix;
		if ( isset( $this->base_prefix ) )
			$old_prefix = $this->base_prefix;
		$this->base_prefix = $prefix;
		if ( $set_table_names ) {
			foreach ( $this->tables( 'global' ) as $table => $prefixed_table )
				$this->$table = $prefixed_table;

			if ( is_multisite() && empty( $this->blogid ) )
				return $old_prefix;

			$this->prefix = $this->get_blog_prefix();

			foreach ( $this->tables( 'blog' ) as $table => $prefixed_table )
				$this->$table = $prefixed_table;

			foreach ( $this->tables( 'old' ) as $table => $prefixed_table )
				$this->$table = $prefixed_table;
		}
		return $old_prefix;
	}

public function set_prefix( $prefix, $set_table_names = true ) {

if ( preg_match( '|[^a-z0-9_]|i', $prefix ) )

return new WP_Error('invalid_db_prefix', 'Invalid database prefix' );

$old_prefix = is_multisite() ? '' : $prefix;

if ( isset( $this->base_prefix ) )

$old_prefix = $this->base_prefix;

$this->base_prefix = $prefix;

if ( $set_table_names ) {

foreach ( $this->tables( 'global' ) as $table => $prefixed_table )

$this->$table = $prefixed_table;

if ( is_multisite() && empty( $this->blogid ) )

return $old_prefix;

$this->prefix = $this->get_blog_prefix();

foreach ( $this->tables( 'blog' ) as $table => $prefixed_table )

$this->$table = $prefixed_table;

foreach ( $this->tables( 'old' ) as $table => $prefixed_table )

$this->$table = $prefixed_table;

}

return $old_prefix;

}

メソッド

wpdb::set_blog_id()

	public function set_blog_id( $blog_id, $site_id = 0 ) {
		if ( ! empty( $site_id ) )
			$this->siteid = $site_id;

		$old_blog_id  = $this->blogid;
		$this->blogid = $blog_id;

		$this->prefix = $this->get_blog_prefix();

		foreach ( $this->tables( 'blog' ) as $table => $prefixed_table )
			$this->$table = $prefixed_table;

		foreach ( $this->tables( 'old' ) as $table => $prefixed_table )
			$this->$table = $prefixed_table;

		return $old_blog_id;
	}

public function set_blog_id( $blog_id, $site_id = 0 ) {

if ( ! empty( $site_id ) )

$this->siteid = $site_id;

$old_blog_id = $this->blogid;

$this->blogid = $blog_id;

$this->prefix = $this->get_blog_prefix();

foreach ( $this->tables( 'blog' ) as $table => $prefixed_table )

$this->$table = $prefixed_table;

foreach ( $this->tables( 'old' ) as $table => $prefixed_table )

$this->$table = $prefixed_table;

return $old_blog_id;

}

メソッド

wpdb::get_blog_prefix()

	public function get_blog_prefix( $blog_id = null ) {
		if ( is_multisite() ) {
			if ( null === $blog_id )
				$blog_id = $this->blogid;
			$blog_id = (int) $blog_id;
			if ( defined( 'MULTISITE' ) && ( 0 == $blog_id || 1 == $blog_id ) )
				return $this->base_prefix;
			else
				return $this->base_prefix . $blog_id . '_';
		} else {
			return $this->base_prefix;
		}
	}

public function get_blog_prefix( $blog_id = null ) {

if ( is_multisite() ) {

if ( null === $blog_id )

$blog_id = $this->blogid;

$blog_id = (int) $blog_id;

if ( defined( 'MULTISITE' ) && ( 0 == $blog_id || 1 == $blog_id ) )

return $this->base_prefix;

else

return $this->base_prefix . $blog_id . '_';

} else {

return $this->base_prefix;

}

メソッド

wpdb::tables()

	public function tables( $scope = 'all', $prefix = true, $blog_id = 0 ) {
		switch ( $scope ) {
			case 'all' :
				$tables = array_merge( $this->global_tables, $this->tables );
				if ( is_multisite() )
					$tables = array_merge( $tables, $this->ms_global_tables );
				break;
			case 'blog' :
				$tables = $this->tables;
				break;
			case 'global' :
				$tables = $this->global_tables;
				if ( is_multisite() )
					$tables = array_merge( $tables, $this->ms_global_tables );
				break;
			case 'ms_global' :
				$tables = $this->ms_global_tables;
				break;
			case 'old' :
				$tables = $this->old_tables;
				break;
			default :
				return array();
		}

		if ( $prefix ) {
			if ( ! $blog_id )
				$blog_id = $this->blogid;
			$blog_prefix = $this->get_blog_prefix( $blog_id );
			$base_prefix = $this->base_prefix;
			$global_tables = array_merge( $this->global_tables, $this->ms_global_tables );
			foreach ( $tables as $k => $table ) {
				if ( in_array( $table, $global_tables ) )
					$tables[ $table ] = $base_prefix . $table;
				else
					$tables[ $table ] = $blog_prefix . $table;
				unset( $tables[ $k ] );
			}

			if ( isset( $tables['users'] ) && defined( 'CUSTOM_USER_TABLE' ) )
				$tables['users'] = CUSTOM_USER_TABLE;

			if ( isset( $tables['usermeta'] ) && defined( 'CUSTOM_USER_META_TABLE' ) )
				$tables['usermeta'] = CUSTOM_USER_META_TABLE;
		}

		return $tables;
	}

public function tables( $scope = 'all', $prefix = true, $blog_id = 0 ) {

switch ( $scope ) {

case 'all' :

$tables = array_merge( $this->global_tables, $this->tables );

if ( is_multisite() )

$tables = array_merge( $tables, $this->ms_global_tables );

break;

case 'blog' :

$tables = $this->tables;

break;

case 'global' :

$tables = $this->global_tables;

if ( is_multisite() )

$tables = array_merge( $tables, $this->ms_global_tables );

break;

case 'ms_global' :

$tables = $this->ms_global_tables;

break;

case 'old' :

$tables = $this->old_tables;

break;

default :

return array();

}

if ( $prefix ) {

if ( ! $blog_id )

$blog_id = $this->blogid;

$blog_prefix = $this->get_blog_prefix( $blog_id );

$base_prefix = $this->base_prefix;

$global_tables = array_merge( $this->global_tables, $this->ms_global_tables );

foreach ( $tables as $k => $table ) {

if ( in_array( $table, $global_tables ) )

$tables[ $table ] = $base_prefix . $table;

else

$tables[ $table ] = $blog_prefix . $table;

unset( $tables[ $k ] );

}

if ( isset( $tables['users'] ) && defined( 'CUSTOM_USER_TABLE' ) )

$tables['users'] = CUSTOM_USER_TABLE;

if ( isset( $tables['usermeta'] ) && defined( 'CUSTOM_USER_META_TABLE' ) )

$tables['usermeta'] = CUSTOM_USER_META_TABLE;

}

return $tables;

}

メソッド

wpdb::select()

	public function select( $db, $dbh = null ) {
		if ( is_null($dbh) )
			$dbh = $this->dbh;

		if ( $this->use_mysqli ) {
			$success = @mysqli_select_db( $dbh, $db );
		} else {
			$success = @mysql_select_db( $db, $dbh );
		}
		if ( ! $success ) {
			$this->ready = false;
			if ( ! did_action( 'template_redirect' ) ) {
				wp_load_translations_early();
				$this->bail( sprintf( __( '<h1>Can&#8217;t select database</h1>
<p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>%1$s</code> database.</p>
<ul>
<li>Are you sure it exists?</li>
<li>Does the user <code>%2$s</code> have permission to use the <code>%1$s</code> database?</li>
<li>On some systems the name of your database is prefixed with your username, so it would be like <code>username_%1$s</code>. Could that be the problem?</li>
</ul>
<p>If you don\'t know how to set up a database you should <strong>contact your host</strong>. If all else fails you may find help at the <a href="https://wordpress.org/support/">WordPress Support Forums</a>.</p>' ), htmlspecialchars( $db, ENT_QUOTES ), htmlspecialchars( $this->dbuser, ENT_QUOTES ) ), 'db_select_fail' );
			}
			return;
		}
	}

public function select( $db, $dbh = null ) {

if ( is_null($dbh) )

$dbh = $this->dbh;

if ( $this->use_mysqli ) {

$success = @mysqli_select_db( $dbh, $db );

} else {

$success = @mysql_select_db( $db, $dbh );

}

if ( ! $success ) {

$this->ready = false;

if ( ! did_action( 'template_redirect' ) ) {

wp_load_translations_early();

$this->bail( sprintf( __( '<h1>Can’t select database</h1>

<p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>%1$s</code> database.</p>

<ul>

<li>Are you sure it exists?</li>

<li>Does the user <code>%2$s</code> have permission to use the <code>%1$s</code> database?</li>

<li>On some systems the name of your database is prefixed with your username, so it would be like <code>username_%1$s</code>. Could that be the problem?</li>

</ul>

<p>If you don\'t know how to set up a database you should <strong>contact your host</strong>. If all else fails you may find help at the <a href="https://wordpress.org/support/">WordPress Support Forums</a>.</p>' ), htmlspecialchars( $db, ENT_QUOTES ), htmlspecialchars( $this->dbuser, ENT_QUOTES ) ), 'db_select_fail' );

}

return;

}

メソッド

wpdb::_weak_escape()

__METHOD__　自動的に定義される定数　クラスのメソッド名。

	function _weak_escape( $string ) {
		if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) )
			_deprecated_function( __METHOD__, '3.6', 'wpdb::prepare() or esc_sql()' );
		return addslashes( $string );
	}

function _weak_escape( $string ) {

if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) )

_deprecated_function( __METHOD__, '3.6', 'wpdb::prepare() or esc_sql()' );

return addslashes( $string );

}

メソッド

wpdb::_real_escape()

	function _real_escape( $string ) {
		if ( $this->dbh ) {
			if ( $this->use_mysqli ) {
				return mysqli_real_escape_string( $this->dbh, $string );
			} else {
				return mysql_real_escape_string( $string, $this->dbh );
			}
		}
		$class = get_class( $this );
		_doing_it_wrong( $class, "$class must set a database connection for use with escaping.", E_USER_NOTICE );
		return addslashes( $string );
	}

function _real_escape( $string ) {

if ( $this->dbh ) {

if ( $this->use_mysqli ) {

return mysqli_real_escape_string( $this->dbh, $string );

} else {

return mysql_real_escape_string( $string, $this->dbh );

}

$class = get_class( $this );

_doing_it_wrong( $class, "$class must set a database connection for use with escaping.", E_USER_NOTICE );

return addslashes( $string );

}

メソッド

wpdb:: _escape()

	function _escape( $data ) {
		if ( is_array( $data ) ) {
			foreach ( $data as $k => $v ) {
				if ( is_array($v) )
					$data[$k] = $this->_escape( $v );
				else
					$data[$k] = $this->_real_escape( $v );
			}
		} else {
			$data = $this->_real_escape( $data );
		}

		return $data;
	}

function _escape( $data ) {

if ( is_array( $data ) ) {

foreach ( $data as $k => $v ) {

if ( is_array($v) )

$data[$k] = $this->_escape( $v );

else

$data[$k] = $this->_real_escape( $v );

}

} else {

$data = $this->_real_escape( $data );

}

return $data;

}

メソッド

wpdb::escape()

__METHOD__　自動的に定義される定数　クラスのメソッド名。

	public function escape( $data ) {
		if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) )
			_deprecated_function( __METHOD__, '3.6', 'wpdb::prepare() or esc_sql()' );
		if ( is_array( $data ) ) {
			foreach ( $data as $k => $v ) {
				if ( is_array( $v ) )
					$data[$k] = $this->escape( $v, 'recursive' );
				else
					$data[$k] = $this->_weak_escape( $v, 'internal' );
			}
		} else {
			$data = $this->_weak_escape( $data, 'internal' );
		}

		return $data;
	}

public function escape( $data ) {

if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) )

_deprecated_function( __METHOD__, '3.6', 'wpdb::prepare() or esc_sql()' );

if ( is_array( $data ) ) {

foreach ( $data as $k => $v ) {

if ( is_array( $v ) )

$data[$k] = $this->escape( $v, 'recursive' );

else

$data[$k] = $this->_weak_escape( $v, 'internal' );

}

} else {

$data = $this->_weak_escape( $data, 'internal' );

}

return $data;

}

メソッド

wpdb::escape_by_ref()

	public function escape_by_ref( &$string ) {
		if ( ! is_float( $string ) )
			$string = $this->_real_escape( $string );
	}

public function escape_by_ref( &$string ) {

if ( ! is_float( $string ) )

$string = $this->_real_escape( $string );

}

メソッド

wpdb::prepare()

	public function prepare( $query, $args ) {
		if ( is_null( $query ) )
			return;

		// This is not meant to be foolproof -- but it will catch obviously incorrect usage.
		if ( strpos( $query, '%' ) === false ) {
			_doing_it_wrong( 'wpdb::prepare', sprintf( __( 'The query argument of %s must have a placeholder.' ), 'wpdb::prepare()' ), '3.9' );
		}
		$args = func_get_args();
		array_shift( $args );
		// If args were passed as an array (as in vsprintf), move them up
		if ( isset( $args[0] ) && is_array($args[0]) )
			$args = $args[0];
		$query = str_replace( "'%s'", '%s', $query ); // in case someone mistakenly already singlequoted it
		$query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting
		$query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware
		$query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s
		array_walk( $args, array( $this, 'escape_by_ref' ) );
		return @vsprintf( $query, $args );
	}

public function prepare( $query, $args ) {

if ( is_null( $query ) )

return;

// This is not meant to be foolproof -- but it will catch obviously incorrect usage.

if ( strpos( $query, '%' ) === false ) {

_doing_it_wrong( 'wpdb::prepare', sprintf( __( 'The query argument of %s must have a placeholder.' ), 'wpdb::prepare()' ), '3.9' );

}

$args = func_get_args();

array_shift( $args );

// If args were passed as an array (as in vsprintf), move them up

if ( isset( $args[0] ) && is_array($args[0]) )

$args = $args[0];

$query = str_replace( "'%s'", '%s', $query ); // in case someone mistakenly already singlequoted it

$query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting

$query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware

$query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s

array_walk( $args, array( $this, 'escape_by_ref' ) );

return @vsprintf( $query, $args );

}

メソッド

wpdb::esc_like()

	public function esc_like( $text ) {
		return addcslashes( $text, '_%\\' );
	}

public function esc_like( $text ) {

return addcslashes( $text, '_%\\' );

}

メソッド

wpdb::print_error()

	public function print_error( $str = '' ) {
		global $EZSQL_ERROR;

		if ( !$str ) {
			if ( $this->use_mysqli ) {
				$str = mysqli_error( $this->dbh );
			} else {
				$str = mysql_error( $this->dbh );
			}
		}
		$EZSQL_ERROR[] = array( 'query' => $this->last_query, 'error_str' => $str );

		if ( $this->suppress_errors )
			return false;

		wp_load_translations_early();

		if ( $caller = $this->get_caller() )
			$error_str = sprintf( __( 'WordPress database error %1$s for query %2$s made by %3$s' ), $str, $this->last_query, $caller );
		else
			$error_str = sprintf( __( 'WordPress database error %1$s for query %2$s' ), $str, $this->last_query );

		error_log( $error_str );

		// Are we showing errors?
		if ( ! $this->show_errors )
			return false;

		// If there is an error then take note of it
		if ( is_multisite() ) {
			$msg = "WordPress database error: [$str]\n{$this->last_query}\n";
			if ( defined( 'ERRORLOGFILE' ) )
				error_log( $msg, 3, ERRORLOGFILE );
			if ( defined( 'DIEONDBERROR' ) )
				wp_die( $msg );
		} else {
			$str   = htmlspecialchars( $str, ENT_QUOTES );
			$query = htmlspecialchars( $this->last_query, ENT_QUOTES );

			print "<div id='error'>
			<p class='wpdberror'><strong>WordPress database error:</strong> [$str]<br />
$query</code></p>
			</div>";
		}
	}

public function print_error( $str = '' ) {

global $EZSQL_ERROR;

if ( !$str ) {

if ( $this->use_mysqli ) {

$str = mysqli_error( $this->dbh );

} else {

$str = mysql_error( $this->dbh );

}

$EZSQL_ERROR[] = array( 'query' => $this->last_query, 'error_str' => $str );

if ( $this->suppress_errors )

return false;

wp_load_translations_early();

if ( $caller = $this->get_caller() )

$error_str = sprintf( __( 'WordPress database error %1$s for query %2$s made by %3$s' ), $str, $this->last_query, $caller );

else

$error_str = sprintf( __( 'WordPress database error %1$s for query %2$s' ), $str, $this->last_query );

error_log( $error_str );

// Are we showing errors?

if ( ! $this->show_errors )

return false;

// If there is an error then take note of it

if ( is_multisite() ) {

$msg = "WordPress database error: [$str]\n{$this->last_query}\n";

if ( defined( 'ERRORLOGFILE' ) )

error_log( $msg, 3, ERRORLOGFILE );

if ( defined( 'DIEONDBERROR' ) )

wp_die( $msg );

} else {

$str = htmlspecialchars( $str, ENT_QUOTES );

$query = htmlspecialchars( $this->last_query, ENT_QUOTES );

print "<div id='error'>

<p class='wpdberror'><strong>WordPress database error:</strong> [$str]<br />

$query</code></p>

</div>";

}

メソッド

wpdb::show_errors()

	public function show_errors( $show = true ) {
		$errors = $this->show_errors;
		$this->show_errors = $show;
		return $errors;
	}

public function show_errors( $show = true ) {

$errors = $this->show_errors;

$this->show_errors = $show;

return $errors;

}

メソッド

wpdb::hide_errors()

	public function hide_errors() {
		$show = $this->show_errors;
		$this->show_errors = false;
		return $show;
	}

public function hide_errors() {

$show = $this->show_errors;

$this->show_errors = false;

return $show;

}

メソッド

wpdb::suppress_errors()

	public function suppress_errors( $suppress = true ) {
		$errors = $this->suppress_errors;
		$this->suppress_errors = (bool) $suppress;
		return $errors;
	}

public function suppress_errors( $suppress = true ) {

$errors = $this->suppress_errors;

$this->suppress_errors = (bool) $suppress;

return $errors;

}

メソッド

wpdb::function flush()

	public function flush() {
		$this->last_result = array();
		$this->col_info    = null;
		$this->last_query  = null;
		$this->rows_affected = $this->num_rows = 0;
		$this->last_error  = '';

		if ( is_resource( $this->result ) ) {
			if ( $this->use_mysqli ) {
				mysqli_free_result( $this->result );
			} else {
				mysql_free_result( $this->result );
			}
		}
	}

public function flush() {

$this->last_result = array();

$this->col_info = null;

$this->last_query = null;

$this->rows_affected = $this->num_rows = 0;

$this->last_error = '';

if ( is_resource( $this->result ) ) {

if ( $this->use_mysqli ) {

mysqli_free_result( $this->result );

} else {

mysql_free_result( $this->result );

}

メソッド

wpdb::db_connect()

	public function db_connect( $allow_bail = true ) {
		$this->is_mysql = true;
		$new_link = defined( 'MYSQL_NEW_LINK' ) ? MYSQL_NEW_LINK : true;
		$client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0;

		if ( $this->use_mysqli ) {
			$this->dbh = mysqli_init();

			$port = null;
			$socket = null;
			$host = $this->dbhost;
			$port_or_socket = strstr( $host, ':' );
			if ( ! empty( $port_or_socket ) ) {
				$host = substr( $host, 0, strpos( $host, ':' ) );
				$port_or_socket = substr( $port_or_socket, 1 );
				if ( 0 !== strpos( $port_or_socket, '/' ) ) {
					$port = intval( $port_or_socket );
					$maybe_socket = strstr( $port_or_socket, ':' );
					if ( ! empty( $maybe_socket ) ) {
						$socket = substr( $maybe_socket, 1 );
					}
				} else {
					$socket = $port_or_socket;
				}
			}

			if ( WP_DEBUG ) {
				mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
			} else {
				@mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
			}

			if ( $this->dbh->connect_errno ) {
				$this->dbh = null;
				$attempt_fallback = true;

				if ( $this->has_connected ) {
					$attempt_fallback = false;
				} else if ( defined( 'WP_USE_EXT_MYSQL' ) && ! WP_USE_EXT_MYSQL ) {
					$attempt_fallback = false;
				} else if ( ! function_exists( 'mysql_connect' ) ) {
					$attempt_fallback = false;
				}

				if ( $attempt_fallback ) {
					$this->use_mysqli = false;
					$this->db_connect();
				}
			}
		} else {
			if ( WP_DEBUG ) {
				$this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
			} else {
				$this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
			}
		}

		if ( ! $this->dbh && $allow_bail ) {
			wp_load_translations_early();

			// Load custom DB error template, if present.
			if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
				require_once( WP_CONTENT_DIR . '/db-error.php' );
				die();
			}

			$this->bail( sprintf( __( "
<h1>Error establishing a database connection</h1>
<p>This either means that the username and password information in your <code>wp-config.php</code> file is incorrect or we can't contact the database server at <code>%s</code>. This could mean your host's database server is down.</p>
<ul>
	<li>Are you sure you have the correct username and password?</li>
	<li>Are you sure that you have typed the correct hostname?</li>
	<li>Are you sure that the database server is running?</li>
</ul>
<p>If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href='https://wordpress.org/support/'>WordPress Support Forums</a>.</p>
" ), htmlspecialchars( $this->dbhost, ENT_QUOTES ) ), 'db_connect_fail' );

			return false;
		} else if ( $this->dbh ) {
			$this->has_connected = true;
			$this->set_charset( $this->dbh );
			$this->set_sql_mode();
			$this->ready = true;
			$this->select( $this->dbname, $this->dbh );

			return true;
		}

		return false;
	}

public function db_connect( $allow_bail = true ) {

$this->is_mysql = true;

$new_link = defined( 'MYSQL_NEW_LINK' ) ? MYSQL_NEW_LINK : true;

$client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0;

if ( $this->use_mysqli ) {

$this->dbh = mysqli_init();

$port = null;

$socket = null;

$host = $this->dbhost;

$port_or_socket = strstr( $host, ':' );

if ( ! empty( $port_or_socket ) ) {

$host = substr( $host, 0, strpos( $host, ':' ) );

$port_or_socket = substr( $port_or_socket, 1 );

if ( 0 !== strpos( $port_or_socket, '/' ) ) {

$port = intval( $port_or_socket );

$maybe_socket = strstr( $port_or_socket, ':' );

if ( ! empty( $maybe_socket ) ) {

$socket = substr( $maybe_socket, 1 );

}

} else {

$socket = $port_or_socket;

}

if ( WP_DEBUG ) {

mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );

} else {

@mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );

}

if ( $this->dbh->connect_errno ) {

$this->dbh = null;

$attempt_fallback = true;

if ( $this->has_connected ) {

$attempt_fallback = false;

} else if ( defined( 'WP_USE_EXT_MYSQL' ) && ! WP_USE_EXT_MYSQL ) {

$attempt_fallback = false;

} else if ( ! function_exists( 'mysql_connect' ) ) {

$attempt_fallback = false;

}

if ( $attempt_fallback ) {

$this->use_mysqli = false;

$this->db_connect();

}

} else {

if ( WP_DEBUG ) {

$this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );

} else {

$this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );

}

if ( ! $this->dbh && $allow_bail ) {

wp_load_translations_early();

// Load custom DB error template, if present.

if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {

require_once( WP_CONTENT_DIR . '/db-error.php' );

die();

}

$this->bail( sprintf( __( "

<h1>Error establishing a database connection</h1>

<p>This either means that the username and password information in your <code>wp-config.php</code> file is incorrect or we can't contact the database server at <code>%s</code>. This could mean your host's database server is down.</p>

<ul>

<li>Are you sure you have the correct username and password?</li>

<li>Are you sure that you have typed the correct hostname?</li>

<li>Are you sure that the database server is running?</li>

</ul>

<p>If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href='https://wordpress.org/support/'>WordPress Support Forums</a>.</p>

" ), htmlspecialchars( $this->dbhost, ENT_QUOTES ) ), 'db_connect_fail' );

return false;

} else if ( $this->dbh ) {

$this->has_connected = true;

$this->set_charset( $this->dbh );

$this->set_sql_mode();

$this->ready = true;

$this->select( $this->dbname, $this->dbh );

return true;

}

return false;

}

メソッド

wpdb::check_connection()

	public function check_connection( $allow_bail = true ) {
		if ( $this->use_mysqli ) {
			if ( @mysqli_ping( $this->dbh ) ) {
				return true;
			}
		} else {
			if ( @mysql_ping( $this->dbh ) ) {
				return true;
			}
		}
		$error_reporting = false;

		if ( WP_DEBUG ) {
			$error_reporting = error_reporting();
			error_reporting( $error_reporting & ~E_WARNING );
		}

		for ( $tries = 1; $tries <= $this->reconnect_retries; $tries++ ) {
			if ( $this->reconnect_retries === $tries && WP_DEBUG ) {
				error_reporting( $error_reporting );
			}

			if ( $this->db_connect( false ) ) {
				if ( $error_reporting ) {
					error_reporting( $error_reporting );
				}

				return true;
			}

			sleep( 1 );
		}

		if ( did_action( 'template_redirect' ) ) {
			return false;
		}

		if ( ! $allow_bail ) {
			return false;
		}

		// We weren't able to reconnect, so we better bail.
		$this->bail( sprintf( ( "
<h1>Error reconnecting to the database</h1>
<p>This means that we lost contact with the database server at <code>%s</code>. This could mean your host's database server is down.</p>
<ul>
	<li>Are you sure that the database server is running?</li>
	<li>Are you sure that the database server is not under particularly heavy load?</li>
</ul>
<p>If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href='https://wordpress.org/support/'>WordPress Support Forums</a>.</p>
" ), htmlspecialchars( $this->dbhost, ENT_QUOTES ) ), 'db_connect_fail' );

		// Call dead_db() if bail didn't die, because this database is no more. It has ceased to be (at least temporarily).
		dead_db();
	}

public function check_connection( $allow_bail = true ) {

if ( $this->use_mysqli ) {

if ( @mysqli_ping( $this->dbh ) ) {

return true;

}

} else {

if ( @mysql_ping( $this->dbh ) ) {

return true;

}

$error_reporting = false;

if ( WP_DEBUG ) {

$error_reporting = error_reporting();

error_reporting( $error_reporting & ~E_WARNING );

}

for ( $tries = 1; $tries <= $this->reconnect_retries; $tries++ ) {

if ( $this->reconnect_retries === $tries && WP_DEBUG ) {

error_reporting( $error_reporting );

}

if ( $this->db_connect( false ) ) {

if ( $error_reporting ) {

error_reporting( $error_reporting );

}

return true;

}

sleep( 1 );

}

if ( did_action( 'template_redirect' ) ) {

return false;

}

if ( ! $allow_bail ) {

return false;

}

// We weren't able to reconnect, so we better bail.

$this->bail( sprintf( ( "

<h1>Error reconnecting to the database</h1>

<p>This means that we lost contact with the database server at <code>%s</code>. This could mean your host's database server is down.</p>

<ul>

<li>Are you sure that the database server is running?</li>

<li>Are you sure that the database server is not under particularly heavy load?</li>

</ul>

" ), htmlspecialchars( $this->dbhost, ENT_QUOTES ) ), 'db_connect_fail' );

// Call dead_db() if bail didn't die, because this database is no more. It has ceased to be (at least temporarily).

dead_db();

}

メソッド

wpdb::query()

	public function query( $query ) {
		if ( ! $this->ready )
			return false;

		$query = apply_filters( 'query', $query );
		$this->flush();
		$this->func_call = "\$db->query(\"$query\")";
		$this->last_query = $query;
		$this->_do_query( $query );
		$mysql_errno = 0;
		if ( ! empty( $this->dbh ) ) {
			if ( $this->use_mysqli ) {
				$mysql_errno = mysqli_errno( $this->dbh );
			} else {
				$mysql_errno = mysql_errno( $this->dbh );
			}
		}

		if ( empty( $this->dbh ) || 2006 == $mysql_errno ) {
			if ( $this->check_connection() ) {
				$this->_do_query( $query );
			} else {
				$this->insert_id = 0;
				return false;
			}
		}

		if ( $this->use_mysqli ) {
			$this->last_error = mysqli_error( $this->dbh );
		} else {
			$this->last_error = mysql_error( $this->dbh );
		}

		if ( $this->last_error ) {
			if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) )
				$this->insert_id = 0;

			$this->print_error();
			return false;
		}

		if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) {
			$return_val = $this->result;
		} elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) {
			if ( $this->use_mysqli ) {
				$this->rows_affected = mysqli_affected_rows( $this->dbh );
			} else {
				$this->rows_affected = mysql_affected_rows( $this->dbh );
			}
			if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {
				if ( $this->use_mysqli ) {
					$this->insert_id = mysqli_insert_id( $this->dbh );
				} else {
					$this->insert_id = mysql_insert_id( $this->dbh );
				}
			}
			$return_val = $this->rows_affected;
		} else {
			$num_rows = 0;
			if ( $this->use_mysqli ) {
				while ( $row = @mysqli_fetch_object( $this->result ) ) {
					$this->last_result[$num_rows] = $row;
					$num_rows++;
				}
			} else {
				while ( $row = @mysql_fetch_object( $this->result ) ) {
					$this->last_result[$num_rows] = $row;
					$num_rows++;
				}
			}
			$this->num_rows = $num_rows;
			$return_val     = $num_rows;
		}

		return $return_val;
	}

public function query( $query ) {

if ( ! $this->ready )

return false;

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

$this->flush();

$this->func_call = "\$db->query(\"$query\")";

$this->last_query = $query;

$this->_do_query( $query );

$mysql_errno = 0;

if ( ! empty( $this->dbh ) ) {

if ( $this->use_mysqli ) {

$mysql_errno = mysqli_errno( $this->dbh );

} else {

$mysql_errno = mysql_errno( $this->dbh );

}

if ( empty( $this->dbh ) || 2006 == $mysql_errno ) {

if ( $this->check_connection() ) {

$this->_do_query( $query );

} else {

$this->insert_id = 0;

return false;

}

if ( $this->use_mysqli ) {

$this->last_error = mysqli_error( $this->dbh );

} else {

$this->last_error = mysql_error( $this->dbh );

}

if ( $this->last_error ) {

if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) )

$this->insert_id = 0;

$this->print_error();

return false;

}

if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) {

$return_val = $this->result;

} elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) {

if ( $this->use_mysqli ) {

$this->rows_affected = mysqli_affected_rows( $this->dbh );

} else {

$this->rows_affected = mysql_affected_rows( $this->dbh );

}

if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {

if ( $this->use_mysqli ) {

$this->insert_id = mysqli_insert_id( $this->dbh );

} else {

$this->insert_id = mysql_insert_id( $this->dbh );

}

$return_val = $this->rows_affected;

} else {

$num_rows = 0;

if ( $this->use_mysqli ) {

while ( $row = @mysqli_fetch_object( $this->result ) ) {

$this->last_result[$num_rows] = $row;

$num_rows++;

}

} else {

while ( $row = @mysql_fetch_object( $this->result ) ) {

$this->last_result[$num_rows] = $row;

$num_rows++;

}

$this->num_rows = $num_rows;

$return_val = $num_rows;

}

return $return_val;

}

メソッド

wpdb::_do_query()

	private function _do_query( $query ) {
		if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
			$this->timer_start();
		}

		if ( $this->use_mysqli ) {
			$this->result = @mysqli_query( $this->dbh, $query );
		} else {
			$this->result = @mysql_query( $query, $this->dbh );
		}
		$this->num_queries++;

		if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
			$this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() );
		}
	}

private function _do_query( $query ) {

if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {

$this->timer_start();

}

if ( $this->use_mysqli ) {

$this->result = @mysqli_query( $this->dbh, $query );

} else {

$this->result = @mysql_query( $query, $this->dbh );

}

$this->num_queries++;

if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {

$this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() );

}

メソッド

wpdb::insert()

	public function insert( $table, $data, $format = null ) {
		return $this->_insert_replace_helper( $table, $data, $format, 'INSERT' );
	}

public function insert( $table, $data, $format = null ) {

return $this->_insert_replace_helper( $table, $data, $format, 'INSERT' );

}

メソッド

wpdb::replace()

	public function replace( $table, $data, $format = null ) {
		return $this->_insert_replace_helper( $table, $data, $format, 'REPLACE' );
	}

public function replace( $table, $data, $format = null ) {

return $this->_insert_replace_helper( $table, $data, $format, 'REPLACE' );

}

メソッド

wpdb::_insert_replace_helper()

	function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) {
		if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) )
			return false;
		$this->insert_id = 0;
		$formats = $format = (array) $format;
		$fields = array_keys( $data );
		$formatted_fields = array();
		foreach ( $fields as $field ) {
			if ( !empty( $format ) )
				$form = ( $form = array_shift( $formats ) ) ? $form : $format[0];
			elseif ( isset( $this->field_types[$field] ) )
				$form = $this->field_types[$field];
			else
				$form = '%s';
			$formatted_fields[] = $form;
		}
		$sql = "{$type} INTO `$table` (`" . implode( '`,`', $fields ) . "`) VALUES (" . implode( ",", $formatted_fields ) . ")";
		return $this->query( $this->prepare( $sql, $data ) );
	}

function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) {

if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) )

return false;

$this->insert_id = 0;

$formats = $format = (array) $format;

$fields = array_keys( $data );

$formatted_fields = array();

foreach ( $fields as $field ) {

if ( !empty( $format ) )

$form = ( $form = array_shift( $formats ) ) ? $form : $format[0];

elseif ( isset( $this->field_types[$field] ) )

$form = $this->field_types[$field];

else

$form = '%s';

$formatted_fields[] = $form;

}

$sql = "{$type} INTO `$table` (`" . implode( '`,`', $fields ) . "`) VALUES (" . implode( ",", $formatted_fields ) . ")";

return $this->query( $this->prepare( $sql, $data ) );

}

メソッド

wpdb::update()

	public function update( $table, $data, $where, $format = null, $where_format = null ) {
		if ( ! is_array( $data ) || ! is_array( $where ) )
			return false;

		$formats = $format = (array) $format;
		$bits = $wheres = array();
		foreach ( (array) array_keys( $data ) as $field ) {
			if ( !empty( $format ) )
				$form = ( $form = array_shift( $formats ) ) ? $form : $format[0];
			elseif ( isset($this->field_types[$field]) )
				$form = $this->field_types[$field];
			else
				$form = '%s';
			$bits[] = "`$field` = {$form}";
		}

		$where_formats = $where_format = (array) $where_format;
		foreach ( (array) array_keys( $where ) as $field ) {
			if ( !empty( $where_format ) )
				$form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0];
			elseif ( isset( $this->field_types[$field] ) )
				$form = $this->field_types[$field];
			else
				$form = '%s';
			$wheres[] = "`$field` = {$form}";
		}

		$sql = "UPDATE `$table` SET " . implode( ', ', $bits ) . ' WHERE ' . implode( ' AND ', $wheres );
		return $this->query( $this->prepare( $sql, array_merge( array_values( $data ), array_values( $where ) ) ) );
	}

public function update( $table, $data, $where, $format = null, $where_format = null ) {

if ( ! is_array( $data ) || ! is_array( $where ) )

return false;

$formats = $format = (array) $format;

$bits = $wheres = array();

foreach ( (array) array_keys( $data ) as $field ) {

if ( !empty( $format ) )

$form = ( $form = array_shift( $formats ) ) ? $form : $format[0];

elseif ( isset($this->field_types[$field]) )

$form = $this->field_types[$field];

else

$form = '%s';

$bits[] = "`$field` = {$form}";

}

$where_formats = $where_format = (array) $where_format;

foreach ( (array) array_keys( $where ) as $field ) {

if ( !empty( $where_format ) )

$form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0];

elseif ( isset( $this->field_types[$field] ) )

$form = $this->field_types[$field];

else

$form = '%s';

$wheres[] = "`$field` = {$form}";

}

$sql = "UPDATE `$table` SET " . implode( ', ', $bits ) . ' WHERE ' . implode( ' AND ', $wheres );

return $this->query( $this->prepare( $sql, array_merge( array_values( $data ), array_values( $where ) ) ) );

}

メソッド

wpdb::delete()

	public function delete( $table, $where, $where_format = null ) {
		if ( ! is_array( $where ) )
			return false;

		$wheres = array();

		$where_formats = $where_format = (array) $where_format;

		foreach ( array_keys( $where ) as $field ) {
			if ( !empty( $where_format ) ) {
				$form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0];
			} elseif ( isset( $this->field_types[ $field ] ) ) {
				$form = $this->field_types[ $field ];
			} else {
				$form = '%s';
			}

			$wheres[] = "$field = $form";
		}

		$sql = "DELETE FROM $table WHERE " . implode( ' AND ', $wheres );
		return $this->query( $this->prepare( $sql, $where ) );
	}

public function delete( $table, $where, $where_format = null ) {

if ( ! is_array( $where ) )

return false;

$wheres = array();

$where_formats = $where_format = (array) $where_format;

foreach ( array_keys( $where ) as $field ) {

if ( !empty( $where_format ) ) {

$form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0];

} elseif ( isset( $this->field_types[ $field ] ) ) {

$form = $this->field_types[ $field ];

} else {

$form = '%s';

}

$wheres[] = "$field = $form";

}

$sql = "DELETE FROM $table WHERE " . implode( ' AND ', $wheres );

return $this->query( $this->prepare( $sql, $where ) );

}

メソッド

wpdb::get_var()

	public function get_var( $query = null, $x = 0, $y = 0 ) {
		$this->func_call = "\$db->get_var(\"$query\", $x, $y)";
		if ( $query )
			$this->query( $query );

		// Extract var out of cached results based x,y vals
		if ( !empty( $this->last_result[$y] ) ) {
			$values = array_values( get_object_vars( $this->last_result[$y] ) );
		}

		// If there is a value return it else return null
		return ( isset( $values[$x] ) && $values[$x] !== '' ) ? $values[$x] : null;
	}

public function get_var( $query = null, $x = 0, $y = 0 ) {

$this->func_call = "\$db->get_var(\"$query\", $x, $y)";

if ( $query )

$this->query( $query );

// Extract var out of cached results based x,y vals

if ( !empty( $this->last_result[$y] ) ) {

$values = array_values( get_object_vars( $this->last_result[$y] ) );

}

// If there is a value return it else return null

return ( isset( $values[$x] ) && $values[$x] !== '' ) ? $values[$x] : null;

}

メソッド

wpdb::get_row()

	public function get_row( $query = null, $output = OBJECT, $y = 0 ) {
		$this->func_call = "\$db->get_row(\"$query\",$output,$y)";
		if ( $query )
			$this->query( $query );
		else
			return null;

		if ( !isset( $this->last_result[$y] ) )
			return null;

		if ( $output == OBJECT ) {
			return $this->last_result[$y] ? $this->last_result[$y] : null;
		} elseif ( $output == ARRAY_A ) {
			return $this->last_result[$y] ? get_object_vars( $this->last_result[$y] ) : null;
		} elseif ( $output == ARRAY_N ) {
			return $this->last_result[$y] ? array_values( get_object_vars( $this->last_result[$y] ) ) : null;
		} elseif ( strtoupper( $output ) === OBJECT ) {
			// Back compat for OBJECT being previously case insensitive.
			return $this->last_result[$y] ? $this->last_result[$y] : null;
		} else {
			$this->print_error( " \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N" );
		}
	}

public function get_row( $query = null, $output = OBJECT, $y = 0 ) {

$this->func_call = "\$db->get_row(\"$query\",$output,$y)";

if ( $query )

$this->query( $query );

else

return null;

if ( !isset( $this->last_result[$y] ) )

return null;

if ( $output == OBJECT ) {

return $this->last_result[$y] ? $this->last_result[$y] : null;

} elseif ( $output == ARRAY_A ) {

return $this->last_result[$y] ? get_object_vars( $this->last_result[$y] ) : null;

} elseif ( $output == ARRAY_N ) {

return $this->last_result[$y] ? array_values( get_object_vars( $this->last_result[$y] ) ) : null;

} elseif ( strtoupper( $output ) === OBJECT ) {

// Back compat for OBJECT being previously case insensitive.

return $this->last_result[$y] ? $this->last_result[$y] : null;

} else {

$this->print_error( " \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N" );

}

メソッド

wpdb::get_col()

	public function get_col( $query = null , $x = 0 ) {
		if ( $query )
			$this->query( $query );

		$new_array = array();
		// Extract the column values
		for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) {
			$new_array[$i] = $this->get_var( null, $x, $i );
		}
		return $new_array;
	}

public function get_col( $query = null , $x = 0 ) {

if ( $query )

$this->query( $query );

$new_array = array();

// Extract the column values

for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) {

$new_array[$i] = $this->get_var( null, $x, $i );

}

return $new_array;

}

メソッド

wpdb::get_results()

	public function get_results( $query = null, $output = OBJECT ) {
		$this->func_call = "\$db->get_results(\"$query\", $output)";

		if ( $query )
			$this->query( $query );
		else
			return null;

		$new_array = array();
		if ( $output == OBJECT ) {
			// Return an integer-keyed array of row objects
			return $this->last_result;
		} elseif ( $output == OBJECT_K ) {
			// Return an array of row objects with keys from column 1
			// (Duplicates are discarded)
			foreach ( $this->last_result as $row ) {
				$var_by_ref = get_object_vars( $row );
				$key = array_shift( $var_by_ref );
				if ( ! isset( $new_array[ $key ] ) )
					$new_array[ $key ] = $row;
			}
			return $new_array;
		} elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
			// Return an integer-keyed array of...
			if ( $this->last_result ) {
				foreach( (array) $this->last_result as $row ) {
					if ( $output == ARRAY_N ) {
						// ...integer-keyed row arrays
						$new_array[] = array_values( get_object_vars( $row ) );
					} else {
						// ...column name-keyed row arrays
						$new_array[] = get_object_vars( $row );
					}
				}
			}
			return $new_array;
		} elseif ( strtoupper( $output ) === OBJECT ) {
			// Back compat for OBJECT being previously case insensitive.
			return $this->last_result;
		}
		return null;
	}

public function get_results( $query = null, $output = OBJECT ) {

$this->func_call = "\$db->get_results(\"$query\", $output)";

if ( $query )

$this->query( $query );

else

return null;

$new_array = array();

if ( $output == OBJECT ) {

// Return an integer-keyed array of row objects

return $this->last_result;

} elseif ( $output == OBJECT_K ) {

// Return an array of row objects with keys from column 1

// (Duplicates are discarded)

foreach ( $this->last_result as $row ) {

$var_by_ref = get_object_vars( $row );

$key = array_shift( $var_by_ref );

if ( ! isset( $new_array[ $key ] ) )

$new_array[ $key ] = $row;

}

return $new_array;

} elseif ( $output == ARRAY_A || $output == ARRAY_N ) {

// Return an integer-keyed array of...

if ( $this->last_result ) {

foreach( (array) $this->last_result as $row ) {

if ( $output == ARRAY_N ) {

// ...integer-keyed row arrays

$new_array[] = array_values( get_object_vars( $row ) );

} else {

// ...column name-keyed row arrays

$new_array[] = get_object_vars( $row );

}

return $new_array;

} elseif ( strtoupper( $output ) === OBJECT ) {

// Back compat for OBJECT being previously case insensitive.

return $this->last_result;

}

return null;

}

メソッド

wpdb::load_col_info()

	protected function load_col_info() {
		if ( $this->col_info )
			return;

		if ( $this->use_mysqli ) {
			for ( $i = 0; $i < @mysqli_num_fields( $this->result ); $i++ ) {
				$this->col_info[ $i ] = @mysqli_fetch_field( $this->result );
			}
		} else {
			for ( $i = 0; $i < @mysql_num_fields( $this->result ); $i++ ) {
				$this->col_info[ $i ] = @mysql_fetch_field( $this->result, $i );
			}
		}
	}

protected function load_col_info() {

if ( $this->col_info )

return;

if ( $this->use_mysqli ) {

for ( $i = 0; $i < @mysqli_num_fields( $this->result ); $i++ ) {

$this->col_info[ $i ] = @mysqli_fetch_field( $this->result );

}

} else {

for ( $i = 0; $i < @mysql_num_fields( $this->result ); $i++ ) {

$this->col_info[ $i ] = @mysql_fetch_field( $this->result, $i );

}

メソッド

wpdb::get_col_info()

	public function get_col_info( $info_type = 'name', $col_offset = -1 ) {
		$this->load_col_info();

		if ( $this->col_info ) {
			if ( $col_offset == -1 ) {
				$i = 0;
				$new_array = array();
				foreach( (array) $this->col_info as $col ) {
					$new_array[$i] = $col->{$info_type};
					$i++;
				}
				return $new_array;
			} else {
				return $this->col_info[$col_offset]->{$info_type};
			}
		}
	}

public function get_col_info( $info_type = 'name', $col_offset = -1 ) {

$this->load_col_info();

if ( $this->col_info ) {

if ( $col_offset == -1 ) {

$i = 0;

$new_array = array();

foreach( (array) $this->col_info as $col ) {

$new_array[$i] = $col->{$info_type};

$i++;

}

return $new_array;

} else {

return $this->col_info[$col_offset]->{$info_type};

}

メソッド

wpdb::timer_start()

	public function timer_start() {
		$this->time_start = microtime( true );
		return true;
	}

public function timer_start() {

$this->time_start = microtime( true );

return true;

}

メソッド

wpdb::timer_stop()

	public function timer_stop() {
		return ( microtime( true ) - $this->time_start );
	}

public function timer_stop() {

return ( microtime( true ) - $this->time_start );

}

メソッド

wpdb::bail()

	public function bail( $message, $error_code = '500' ) {
		if ( !$this->show_errors ) {
			if ( class_exists( 'WP_Error' ) )
				$this->error = new WP_Error($error_code, $message);
			else
				$this->error = $message;
			return false;
		}
		wp_die($message);
	}

public function bail( $message, $error_code = '500' ) {

if ( !$this->show_errors ) {

if ( class_exists( 'WP_Error' ) )

$this->error = new WP_Error($error_code, $message);

else

$this->error = $message;

return false;

}

wp_die($message);

}

メソッド

wpdb::check_database_version()

	public function check_database_version() {
		global $wp_version, $required_mysql_version;
		// Make sure the server has the required MySQL version
		if ( version_compare($this->db_version(), $required_mysql_version, '<') )
			return new WP_Error('database_version', sprintf( __( '<strong>ERROR</strong>: WordPress %1$s requires MySQL %2$s or higher' ), $wp_version, $required_mysql_version ));
	}

public function check_database_version() {

global $wp_version, $required_mysql_version;

// Make sure the server has the required MySQL version

if ( version_compare($this->db_version(), $required_mysql_version, '<') )

return new WP_Error('database_version', sprintf( __( '<strong>ERROR</strong>: WordPress %1$s requires MySQL %2$s or higher' ), $wp_version, $required_mysql_version ));

}

メソッド

wpdb::supports_collation()

	public function supports_collation() {
		_deprecated_function( __FUNCTION__, '3.5', 'wpdb::has_cap( \'collation\' )' );
		return $this->has_cap( 'collation' );
	}

public function supports_collation() {

_deprecated_function( __FUNCTION__, '3.5', 'wpdb::has_cap( \'collation\' )' );

return $this->has_cap( 'collation' );

}

メソッド

wpdb::get_charset_collate()

	public function get_charset_collate() {
		$charset_collate = '';

		if ( ! empty( $this->charset ) )
			$charset_collate = "DEFAULT CHARACTER SET $this->charset";
		if ( ! empty( $this->collate ) )
			$charset_collate .= " COLLATE $this->collate";

		return $charset_collate;
	}

public function get_charset_collate() {

$charset_collate = '';

if ( ! empty( $this->charset ) )

$charset_collate = "DEFAULT CHARACTER SET $this->charset";

if ( ! empty( $this->collate ) )

$charset_collate .= " COLLATE $this->collate";

return $charset_collate;

}

メソッド

wpdb::has_cap()

	public function has_cap( $db_cap ) {
		$version = $this->db_version();

		switch ( strtolower( $db_cap ) ) {
			case 'collation' :    // @since 2.5.0
			case 'group_concat' : // @since 2.7.0
			case 'subqueries' :   // @since 2.7.0
				return version_compare( $version, '4.1', '>=' );
			case 'set_charset' :
				return version_compare( $version, '5.0.7', '>=' );
		};

		return false;
	}

public function has_cap( $db_cap ) {

$version = $this->db_version();

switch ( strtolower( $db_cap ) ) {

case 'collation' : // @since 2.5.0

case 'group_concat' : // @since 2.7.0

case 'subqueries' : // @since 2.7.0

return version_compare( $version, '4.1', '>=' );

case 'set_charset' :

return version_compare( $version, '5.0.7', '>=' );

};

return false;

}

メソッド

wpdb::get_caller()

	public function get_caller() {
		return wp_debug_backtrace_summary( __CLASS__ );
	}

public function get_caller() {

return wp_debug_backtrace_summary( __CLASS__ );

}

メソッド

wpdb::db_version()

	public function db_version() {
		if ( $this->use_mysqli ) {
			$server_info = mysqli_get_server_info( $this->dbh );
		} else {
			$server_info = mysql_get_server_info( $this->dbh );
		}
		return preg_replace( '/[^0-9.].*/', '', $server_info );
	}
}

public function db_version() {

if ( $this->use_mysqli ) {

$server_info = mysqli_get_server_info( $this->dbh );

} else {

$server_info = mysql_get_server_info( $this->dbh );

}

return preg_replace( '/[^0-9.].*/', '', $server_info );

}

クラス定義終了

- Wordpress

WordPressを読む 19 /blog/wp-includes/wp-db.php

定義ファイル : /blog/wp-includes/wp-db.php

呼出元 : 関数 require_wp_db()

クラス class wpdb

WordPressを読む　19 /blog/wp-includes/wp-db.php

定義ファイル　: /blog/wp-includes/wp-db.php

呼出元 : 関数　require_wp_db()

クラス　class wpdb