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< ? php
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/**
* WordPress DB Class
*
* Original code from { @ link http :// php . justinvincent . com Justin Vincent ( justin @ visunet . ie )}
*
* @ package WordPress
* @ subpackage Database
* @ since 0.71
*/
/**
* @ since 0.71
*/
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define ( 'EZSQL_VERSION' , 'WP1.25' );
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/**
* @ since 0.71
*/
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define ( 'OBJECT' , 'OBJECT' , true );
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/**
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* @ since 2.5 . 0
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*/
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define ( 'OBJECT_K' , 'OBJECT_K' );
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/**
* @ since 0.71
*/
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define ( 'ARRAY_A' , 'ARRAY_A' );
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/**
* @ since 0.71
*/
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define ( 'ARRAY_N' , 'ARRAY_N' );
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/**
* WordPress Database Access Abstraction Object
*
* It is possible to replace this class with your own
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* by setting the $wpdb global variable in wp - content / db . php
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* file with your class . You can name it wpdb also , since
* this file will not be included , if the other file is
* available .
*
* @ link http :// codex . wordpress . org / Function_Reference / wpdb_Class
*
* @ package WordPress
* @ subpackage Database
* @ since 0.71
*/
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class wpdb {
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/**
* Whether to show SQL / DB errors
*
* @ since 0.71
* @ access private
* @ var bool
*/
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var $show_errors = false ;
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/**
* Whether to suppress errors during the DB bootstrapping .
*
* @ access private
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* @ since 2.5
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* @ var bool
*/
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var $suppress_errors = false ;
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/**
* The last error during query .
*
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* @ see get_last_error ()
* @ since 2.5
* @ access private
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* @ var string
*/
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var $last_error = '' ;
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/**
* Amount of queries made
*
* @ since 1.2 . 0
* @ access private
* @ var int
*/
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var $num_queries = 0 ;
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/**
* Count of rows returned by previous query
*
* @ since 1.2
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* @ access private
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* @ var int
*/
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var $num_rows = 0 ;
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/**
* Count of affected rows by previous query
*
* @ since 0.71
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* @ access private
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* @ var int
*/
var $rows_affected = 0 ;
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/**
* The ID generated for an AUTO_INCREMENT column by the previous query ( usually INSERT ) .
*
* @ since 0.71
* @ access public
* @ var int
*/
var $insert_id = 0 ;
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/**
* Saved result of the last query made
*
* @ since 1.2 . 0
* @ access private
* @ var array
*/
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var $last_query ;
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/**
* Results of the last query made
*
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* @ since 1.0 . 0
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* @ access private
* @ var array | null
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*/
var $last_result ;
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/**
* Saved info on the table column
*
* @ since 1.2 . 0
* @ access private
* @ var array
*/
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var $col_info ;
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/**
* Saved queries that were executed
*
* @ since 1.5 . 0
* @ access private
* @ var array
*/
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var $queries ;
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/**
* WordPress table prefix
*
* You can set this to have multiple WordPress installations
* in a single database . The second reason is for possible
* security precautions .
*
* @ since 0.71
* @ access private
* @ var string
*/
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var $prefix = '' ;
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/**
* Whether the database queries are ready to start executing .
*
* @ since 2.5 . 0
* @ access private
* @ var bool
*/
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var $ready = false ;
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/**
* { @ internal Missing Description }}
*
* @ since 3.0 . 0
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* @ access public
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* @ var int
*/
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var $blogid = 0 ;
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/**
* { @ internal Missing Description }}
*
* @ since 3.0 . 0
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* @ access public
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* @ var int
*/
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var $siteid = 0 ;
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/**
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* List of WordPress per - blog tables
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*
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* @ since 2.5 . 0
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* @ access private
* @ see wpdb :: tables ()
* @ var array
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*/
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var $tables = array ( 'posts' , 'comments' , 'links' , 'options' , 'postmeta' ,
'terms' , 'term_taxonomy' , 'term_relationships' , 'commentmeta' );
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/**
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* List of deprecated WordPress tables
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*
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* categories , post2cat , and link2cat were deprecated in 2.3 . 0 , db version 5539
*
* @ since 2.9 . 0
* @ access private
* @ see wpdb :: tables ()
* @ var array
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*/
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var $old_tables = array ( 'categories' , 'post2cat' , 'link2cat' );
/**
* List of WordPress global tables
*
* @ since 3.0 . 0
* @ access private
* @ see wpdb :: tables ()
* @ var array
*/
var $global_tables = array ( 'users' , 'usermeta' );
/**
* List of Multisite global tables
*
* @ since 3.0 . 0
* @ access private
* @ see wpdb :: tables ()
* @ var array
*/
var $ms_global_tables = array ( 'blogs' , 'signups' , 'site' , 'sitemeta' ,
'sitecategories' , 'registration_log' , 'blog_versions' );
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/**
* WordPress Comments table
*
* @ since 1.5 . 0
* @ access public
* @ var string
*/
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var $comments ;
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/**
* WordPress Comment Metadata table
*
* @ since 2.9 . 0
* @ access public
* @ var string
*/
var $commentmeta ;
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/**
* WordPress Links table
*
* @ since 1.5 . 0
* @ access public
* @ var string
*/
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var $links ;
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/**
* WordPress Options table
*
* @ since 1.5 . 0
* @ access public
* @ var string
*/
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var $options ;
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/**
* WordPress Post Metadata table
*
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* @ since 1.5 . 0
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* @ access public
* @ var string
*/
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var $postmeta ;
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/**
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* WordPress Posts table
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*
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* @ since 1.5 . 0
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* @ access public
* @ var string
*/
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var $posts ;
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/**
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* WordPress Terms table
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*
* @ since 2.3 . 0
* @ access public
* @ var string
*/
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var $terms ;
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/**
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* WordPress Term Relationships table
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*
* @ since 2.3 . 0
* @ access public
* @ var string
*/
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var $term_relationships ;
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/**
* WordPress Term Taxonomy table
*
* @ since 2.3 . 0
* @ access public
* @ var string
*/
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var $term_taxonomy ;
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/*
* Global and Multisite tables
*/
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/**
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* WordPress User Metadata table
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*
* @ since 2.3 . 0
* @ access public
* @ var string
*/
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var $usermeta ;
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/**
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* WordPress Users table
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*
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* @ since 1.5 . 0
* @ access public
* @ var string
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*/
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var $users ;
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/**
* Multisite Blogs table
*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
var $blogs ;
/**
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* Multisite Blog Versions table
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*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
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var $blog_versions ;
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/**
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* Multisite Registration Log table
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*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
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var $registration_log ;
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/**
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* Multisite Signups table
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*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
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var $signups ;
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/**
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* Multisite Sites table
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*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
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var $site ;
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/**
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* Multisite Sitewide Terms table
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*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
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var $sitecategories ;
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/**
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* Multisite Site Metadata table
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*
* @ since 3.0 . 0
* @ access public
* @ var string
*/
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var $sitemeta ;
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/**
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* Format specifiers for DB columns . Columns not listed here default to % s . Initialized during WP load .
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*
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* Keys are column names , values are format types : 'ID' => '%d'
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*
* @ since 2.8 . 0
* @ see wpdb : prepare ()
* @ see wpdb : insert ()
* @ see wpdb : update ()
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* @ see wp_set_wpdb_vars ()
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* @ access public
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* @ var array
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*/
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var $field_types = array ();
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/**
* Database table columns charset
*
* @ since 2.2 . 0
* @ access public
* @ var string
*/
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var $charset ;
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/**
* Database table columns collate
*
* @ since 2.2 . 0
* @ access public
* @ var string
*/
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var $collate ;
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/**
* Whether to use mysql_real_escape_string
*
* @ since 2.8 . 0
* @ access public
* @ var bool
*/
var $real_escape = false ;
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/**
* Database Username
*
* @ since 2.9 . 0
* @ access private
* @ var string
*/
var $dbuser ;
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/**
* A textual description of the last query / get_row / get_var call
*
* @ since unknown
* @ access public
* @ var string
*/
var $func_call ;
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/**
* Connects to the database server and selects a database
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*
* PHP4 compatibility layer for calling the PHP5 constructor .
*
* @ uses wpdb :: __construct () Passes parameters and returns result
* @ since 0.71
*
* @ param string $dbuser MySQL database user
* @ param string $dbpassword MySQL database password
* @ param string $dbname MySQL database name
* @ param string $dbhost MySQL database host
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*/
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function wpdb ( $dbuser , $dbpassword , $dbname , $dbhost ) {
return $this -> __construct ( $dbuser , $dbpassword , $dbname , $dbhost );
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}
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/**
* Connects to the database server and selects a database
*
* PHP5 style constructor for compatibility with PHP5 . Does
* the actual setting up of the class properties and connection
* to the database .
*
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* @ link http :// core . trac . wordpress . org / ticket / 3354
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* @ since 2.0 . 8
*
* @ param string $dbuser MySQL database user
* @ param string $dbpassword MySQL database password
* @ param string $dbname MySQL database name
* @ param string $dbhost MySQL database host
*/
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function __construct ( $dbuser , $dbpassword , $dbname , $dbhost ) {
register_shutdown_function ( array ( & $this , '__destruct' ) );
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if ( WP_DEBUG )
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$this -> show_errors ();
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$this -> init_charset ();
$this -> dbuser = $dbuser ;
$this -> dbpassword = $dbpassword ;
$this -> dbname = $dbname ;
$this -> dbhost = $dbhost ;
$this -> db_connect ();
}
/**
* PHP5 style destructor and will run when database object is destroyed .
*
* @ see wpdb :: __construct ()
* @ since 2.0 . 8
* @ return bool true
*/
function __destruct () {
return true ;
}
/**
* Set $this -> charset and $this -> collate
*/
function init_charset () {
if ( function_exists ( 'is_multisite' ) && is_multisite () ) {
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$this -> charset = 'utf8' ;
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if ( defined ( 'DB_COLLATE' ) && DB_COLLATE )
$this -> collate = DB_COLLATE ;
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else
$this -> collate = 'utf8_general_ci' ;
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} elseif ( defined ( 'DB_COLLATE' ) ) {
$this -> collate = DB_COLLATE ;
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}
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if ( defined ( 'DB_CHARSET' ) )
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$this -> charset = DB_CHARSET ;
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}
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/**
* Sets the connection ' s character set .
*
* @ param resource $dbh The resource given by mysql_connect
* @ param string $charset The character set ( optional )
* @ param string $collate The collation ( optional )
*/
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' , $dbh ) && ! empty ( $charset ) ) {
if ( function_exists ( 'mysql_set_charset' ) && $this -> has_cap ( 'set_charset' , $dbh ) ) {
mysql_set_charset ( $charset , $dbh );
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$this -> real_escape = true ;
} else {
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$query = $this -> prepare ( 'SET NAMES %s' , $charset );
if ( ! empty ( $collate ) )
$query .= $this -> prepare ( ' COLLATE %s' , $collate );
mysql_query ( $query , $dbh );
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}
}
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}
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/**
* Sets the table prefix for the WordPress tables .
*
* @ since 2.5 . 0
*
* @ param string $prefix Alphanumeric name for the new prefix .
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* @ return string | WP_Error Old prefix or WP_Error on error
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*/
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function set_prefix ( $prefix , $set_table_names = true ) {
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if ( preg_match ( '|[^a-z0-9_]|i' , $prefix ) )
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return new WP_Error ( 'invalid_db_prefix' , /*WP_I18N_DB_BAD_PREFIX*/ 'Invalid database prefix' /*/WP_I18N_DB_BAD_PREFIX*/ );
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$old_prefix = is_multisite () ? '' : $prefix ;
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if ( isset ( $this -> base_prefix ) )
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$old_prefix = $this -> base_prefix ;
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$this -> base_prefix = $prefix ;
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if ( $set_table_names ) {
foreach ( $this -> tables ( 'global' ) as $table => $prefixed_table )
$this -> $table = $prefixed_table ;
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if ( is_multisite () && empty ( $this -> blogid ) )
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return $old_prefix ;
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$this -> prefix = $this -> get_blog_prefix ();
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foreach ( $this -> tables ( 'blog' ) as $table => $prefixed_table )
$this -> $table = $prefixed_table ;
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foreach ( $this -> tables ( 'old' ) as $table => $prefixed_table )
$this -> $table = $prefixed_table ;
}
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return $old_prefix ;
}
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/**
* Sets blog id .
*
* @ since 3.0 . 0
* @ access public
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* @ param int $blog_id
* @ param int $site_id Optional .
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* @ return string previous blog id
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*/
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function set_blog_id ( $blog_id , $site_id = 0 ) {
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if ( ! empty ( $site_id ) )
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$this -> siteid = $site_id ;
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$old_blog_id = $this -> blogid ;
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$this -> blogid = $blog_id ;
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$this -> prefix = $this -> get_blog_prefix ();
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foreach ( $this -> tables ( 'blog' ) as $table => $prefixed_table )
$this -> $table = $prefixed_table ;
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foreach ( $this -> tables ( 'old' ) as $table => $prefixed_table )
$this -> $table = $prefixed_table ;
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return $old_blog_id ;
}
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/**
* Gets blog prefix .
*
* @ uses is_multisite ()
* @ since 3.0 . 0
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* @ param int $blog_id Optional .
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* @ return string Blog prefix .
*/
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function get_blog_prefix ( $blog_id = null ) {
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if ( is_multisite () ) {
2010-04-10 12:39:25 +00:00
if ( null === $blog_id )
2010-04-02 22:47:51 +00:00
$blog_id = $this -> blogid ;
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if ( defined ( 'MULTISITE' ) && ( 0 == $blog_id || 1 == $blog_id ) )
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return $this -> base_prefix ;
else
return $this -> base_prefix . $blog_id . '_' ;
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} else {
return $this -> base_prefix ;
}
}
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/**
* Returns an array of WordPress tables .
*
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* Also allows for the CUSTOM_USER_TABLE and CUSTOM_USER_META_TABLE to
* override the WordPress users and usersmeta tables that would otherwise
* be determined by the prefix .
*
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* The scope argument can take one of the following :
*
* 'all' - returns 'all' and 'global' tables . No old tables are returned .
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* 'blog' - returns the blog - level tables for the queried blog .
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* 'global' - returns the global tables for the installation , returning multisite tables only if running multisite .
* 'ms_global' - returns the multisite global tables , regardless if current installation is multisite .
* 'old' - returns tables which are deprecated .
*
2010-02-19 19:57:03 +00:00
* @ since 3.0 . 0
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* @ uses wpdb :: $tables
* @ uses wpdb :: $old_tables
* @ uses wpdb :: $global_tables
* @ uses wpdb :: $ms_global_tables
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* @ uses is_multisite ()
*
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* @ param string $scope Optional . Can be all , global , ms_global , blog , or old tables . Defaults to all .
* @ param bool $prefix Optional . Whether to include table prefixes . Default true . If blog
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* prefix is requested , then the custom users and usermeta tables will be mapped .
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* @ param int $blog_id Optional . The blog_id to prefix . Defaults to wpdb :: $blogid . Used only when prefix is requested .
2010-02-23 19:58:53 +00:00
* @ return array Table names . When a prefix is requested , the key is the unprefixed table name .
2010-02-23 09:06:50 +00:00
*/
function tables ( $scope = 'all' , $prefix = true , $blog_id = 0 ) {
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switch ( $scope ) {
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case 'all' :
$tables = array_merge ( $this -> global_tables , $this -> tables );
if ( is_multisite () )
$tables = array_merge ( $tables , $this -> ms_global_tables );
2010-02-23 19:58:53 +00:00
break ;
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case 'blog' :
$tables = $this -> tables ;
break ;
2010-02-19 19:57:03 +00:00
case 'global' :
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$tables = $this -> global_tables ;
if ( is_multisite () )
$tables = array_merge ( $tables , $this -> ms_global_tables );
2010-02-19 19:57:03 +00:00
break ;
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case 'ms_global' :
$tables = $this -> ms_global_tables ;
break ;
case 'old' :
$tables = $this -> old_tables ;
break ;
default :
return array ();
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break ;
}
if ( $prefix ) {
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if ( ! $blog_id )
$blog_id = $this -> blogid ;
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$blog_prefix = $this -> get_blog_prefix ( $blog_id );
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$base_prefix = $this -> base_prefix ;
$global_tables = array_merge ( $this -> global_tables , $this -> ms_global_tables );
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foreach ( $tables as $k => $table ) {
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if ( in_array ( $table , $global_tables ) )
$tables [ $table ] = $base_prefix . $table ;
else
2010-02-23 22:04:29 +00:00
$tables [ $table ] = $blog_prefix . $table ;
2010-02-23 09:06:50 +00:00
unset ( $tables [ $k ] );
2010-02-19 19:57:03 +00:00
}
2010-02-23 09:06:50 +00:00
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 ;
2010-02-19 19:57:03 +00:00
}
return $tables ;
}
2006-11-30 01:44:33 +00:00
/**
2008-06-22 20:23:23 +00:00
* Selects a database using the current database connection .
*
* The database name will be changed based on the current database
* connection . On failure , the execution will bail and display an DB error .
*
* @ since 0.71
*
* @ param string $db MySQL database name
2010-06-16 19:28:01 +00:00
* @ param resource $dbh Optional link identifier .
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* @ return null Always null .
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*/
2010-06-16 19:28:01 +00:00
function select ( $db , $dbh = null ) {
if ( is_null ( $dbh ) )
$dbh = $this -> dbh ;
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if ( !@ mysql_select_db ( $db , $dbh ) ) {
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$this -> ready = false ;
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$this -> bail ( sprintf ( /*WP_I18N_DB_SELECT_DB*/ ' < h1 > Can & #8217;t select database</h1>
2008-06-23 15:40:43 +00:00
< 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 >
2004-07-23 01:35:56 +00:00
< ul >
< li > Are you sure it exists ? </ li >
2008-06-23 15:40:43 +00:00
< li > Does the user < code >% 2 $s </ code > have permission to use the < code >% 1 $s </ code > database ? </ li >
2008-11-28 04:40:20 +00:00
< 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 >
2004-07-23 01:35:56 +00:00
</ ul >
2010-03-17 04:39:50 +00:00
< 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="http://wordpress.org/support/">WordPress Support Forums</a>.</p>' /*/WP_I18N_DB_SELECT_DB*/ , $db , $this -> dbuser ), 'db_select_fail' );
2007-12-21 19:30:08 +00:00
return ;
2003-05-28 08:41:04 +00:00
}
2004-04-26 02:28:06 +00:00
}
2003-05-28 08:41:04 +00:00
2010-02-22 22:53:54 +00:00
/**
2010-02-24 18:58:52 +00:00
* Weak escape , using addslashes ()
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*
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* @ see addslashes ()
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* @ since 2.8 . 0
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* @ access private
*
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* @ param string $string
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* @ return string
*/
function _weak_escape ( $string ) {
return addslashes ( $string );
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}
2010-02-22 22:53:54 +00:00
/**
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* Real escape , using mysql_real_escape_string () or addslashes ()
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*
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* @ see mysql_real_escape_string ()
* @ see addslashes ()
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* @ since 2.8
* @ access private
*
* @ param string $string to escape
* @ return string escaped
*/
function _real_escape ( $string ) {
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if ( $this -> dbh && $this -> real_escape )
return mysql_real_escape_string ( $string , $this -> dbh );
else
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return addslashes ( $string );
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}
2010-02-22 22:53:54 +00:00
/**
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* Escape data . Works on arrays .
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*
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* @ uses wpdb :: _escape ()
* @ uses wpdb :: _real_escape ()
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* @ since 2.8
* @ access private
*
* @ param string | array $data
* @ return string | array escaped
*/
function _escape ( $data ) {
if ( is_array ( $data ) ) {
2009-02-20 19:05:12 +00:00
foreach ( ( array ) $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 ;
}
2006-11-30 01:44:33 +00:00
/**
2010-02-23 22:04:29 +00:00
* Escapes content for insertion into the database using addslashes (), for security .
2006-11-30 01:44:33 +00:00
*
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* Works on arrays .
2008-06-22 20:23:23 +00:00
*
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* @ since 0.71
2010-02-24 18:58:52 +00:00
* @ param string | array $data to escape
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* @ return string | array escaped as query safe string
2006-11-30 01:44:33 +00:00
*/
2010-02-22 22:53:54 +00:00
function escape ( $data ) {
if ( is_array ( $data ) ) {
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foreach ( ( array ) $data as $k => $v ) {
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if ( is_array ( $v ) )
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$data [ $k ] = $this -> escape ( $v );
else
$data [ $k ] = $this -> _weak_escape ( $v );
}
} else {
$data = $this -> _weak_escape ( $data );
}
return $data ;
2004-04-26 02:28:06 +00:00
}
2003-05-28 08:41:04 +00:00
2007-07-04 16:18:57 +00:00
/**
* Escapes content by reference for insertion into the database , for security
2008-06-22 20:23:23 +00:00
*
2010-02-23 22:04:29 +00:00
* @ uses wpdb :: _real_escape ()
2008-06-22 20:23:23 +00:00
* @ since 2.3 . 0
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* @ param string $string to escape
2010-02-22 22:53:54 +00:00
* @ return void
2007-07-04 16:18:57 +00:00
*/
2010-02-22 22:53:54 +00:00
function escape_by_ref ( & $string ) {
2009-02-20 19:05:12 +00:00
$string = $this -> _real_escape ( $string );
2007-07-04 16:18:57 +00:00
}
/**
2010-04-10 12:39:25 +00:00
* Prepares a SQL query for safe execution . Uses sprintf () - like syntax .
2008-06-22 20:23:23 +00:00
*
2010-02-23 09:06:50 +00:00
* The following directives can be used in the query format string :
* % d ( decimal number )
2010-02-22 22:53:54 +00:00
* % s ( string )
2010-02-23 09:06:50 +00:00
* %% ( literal percentage sign - no argument needed )
2010-02-22 22:53:54 +00:00
*
2010-04-10 12:39:25 +00:00
* Both % d and % s are to be left unquoted in the query string and they need an argument passed for them .
* Literals ( % ) as parts of the query must be properly written as %%.
2010-02-22 22:53:54 +00:00
*
2009-04-10 21:57:40 +00:00
* This function only supports a small subset of the sprintf syntax ; it only supports % d ( decimal number ), % s ( string ) .
* Does not support sign , padding , alignment , width or precision specifiers .
* Does not support argument numbering / swapping .
*
* May be called like { @ link http :// php . net / sprintf sprintf ()} or like { @ link http :// php . net / vsprintf vsprintf ()} .
*
* Both % d and % s should be left unquoted in the query string .
*
* < code >
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* wpdb :: prepare ( " SELECT * FROM `table` WHERE `column` = %s AND `field` = %d " , 'foo' , 1337 )
* wpdb :: prepare ( " SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s " , 'foo' );
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* </ code >
*
* @ link http :// php . net / sprintf Description of syntax .
2008-06-22 20:23:23 +00:00
* @ since 2.3 . 0
*
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* @ param string $query Query statement with sprintf () - like placeholders
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* @ param array | mixed $args The array of variables to substitute into the query ' s placeholders if being called like
* { @ link http :// php . net / vsprintf vsprintf ()}, or the first variable to substitute into the query ' s placeholders if
* being called like { @ link http :// php . net / sprintf sprintf ()} .
* @ param mixed $args , ... further variables to substitute into the query ' s placeholders if being called like
* { @ link http :// php . net / sprintf sprintf ()} .
* @ return null | false | string Sanitized query string , null if there is no query , false if there is an error and string
* if there was something to prepare
*/
function prepare ( $query = null ) { // ( $query, *$args )
2009-04-10 21:57:40 +00:00
if ( is_null ( $query ) )
2007-07-04 16:18:57 +00:00
return ;
2010-02-23 22:04:29 +00:00
2007-07-04 16:18:57 +00:00
$args = func_get_args ();
2010-02-22 22:53:54 +00:00
array_shift ( $args );
2009-04-10 21:57:40 +00:00
// If args were passed as an array (as in vsprintf), move them up
2010-02-22 22:53:54 +00:00
if ( isset ( $args [ 0 ] ) && is_array ( $args [ 0 ]) )
2009-03-05 22:15:17 +00:00
$args = $args [ 0 ];
2010-02-22 22:53:54 +00:00
$query = str_replace ( " '%s' " , '%s' , $query ); // in case someone mistakenly already singlequoted it
$query = str_replace ( '"%s"' , '%s' , $query ); // doublequote unquoting
2010-02-26 06:14:26 +00:00
$query = preg_replace ( '|(?<!%)%s|' , " '%s' " , $query ); // quote the strings, avoiding escaped strings like %%s
2010-02-22 22:53:54 +00:00
array_walk ( $args , array ( & $this , 'escape_by_ref' ) );
return @ vsprintf ( $query , $args );
2007-07-04 16:18:57 +00:00
}
2008-06-22 20:23:23 +00:00
/**
* Print SQL / DB error .
*
* @ since 0.71
* @ global array $EZSQL_ERROR Stores error information of query and error string
*
* @ param string $str The error to display
* @ return bool False if the showing of errors is disabled .
*/
2010-02-22 22:53:54 +00:00
function print_error ( $str = '' ) {
2004-04-26 02:28:06 +00:00
global $EZSQL_ERROR ;
2008-03-12 22:41:43 +00:00
2010-02-22 22:53:54 +00:00
if ( ! $str )
$str = mysql_error ( $this -> dbh );
$EZSQL_ERROR [] = array ( 'query' => $this -> last_query , 'error_str' => $str );
2004-04-26 02:28:06 +00:00
2008-03-12 22:41:43 +00:00
if ( $this -> suppress_errors )
return false ;
2007-12-16 21:38:24 +00:00
if ( $caller = $this -> get_caller () )
2010-02-26 06:14:26 +00:00
$error_str = sprintf ( /*WP_I18N_DB_QUERY_ERROR_FULL*/ 'WordPress database error %1$s for query %2$s made by %3$s' /*/WP_I18N_DB_QUERY_ERROR_FULL*/ , $str , $this -> last_query , $caller );
2008-06-23 15:40:43 +00:00
else
2010-02-26 06:14:26 +00:00
$error_str = sprintf ( /*WP_I18N_DB_QUERY_ERROR*/ 'WordPress database error %1$s for query %2$s' /*/WP_I18N_DB_QUERY_ERROR*/ , $str , $this -> last_query );
2008-03-20 19:08:40 +00:00
2010-02-26 06:14:26 +00:00
if ( function_exists ( 'error_log' )
2010-03-03 23:07:23 +00:00
&& ( $log_file = @ ini_get ( 'error_log' ) )
2010-02-26 06:14:26 +00:00
&& ( 'syslog' == $log_file || @ is_writable ( $log_file ) )
)
@ error_log ( $error_str );
2007-12-16 21:38:24 +00:00
2010-02-26 06:14:26 +00:00
// Are we showing errors?
2010-02-23 22:04:29 +00:00
if ( ! $this -> show_errors )
2006-02-12 07:53:23 +00:00
return false ;
2007-12-16 21:38:24 +00:00
2010-01-18 22:21:36 +00:00
// 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' ) )
2010-02-19 01:03:58 +00:00
error_log ( $msg , 3 , ERRORLOGFILE );
2010-01-18 22:21:36 +00:00
if ( defined ( 'DIEONDBERROR' ) )
2010-02-23 22:04:29 +00:00
wp_die ( $msg );
2010-01-18 22:21:36 +00:00
} else {
2010-02-22 22:53:54 +00:00
$str = htmlspecialchars ( $str , ENT_QUOTES );
$query = htmlspecialchars ( $this -> last_query , ENT_QUOTES );
2010-01-18 22:21:36 +00:00
print " <div id='error'>
< p class = 'wpdberror' >< strong > WordPress database error :</ strong > [ $str ] < br />
< code > $query </ code ></ p >
</ div > " ;
}
2004-04-26 02:28:06 +00:00
}
2003-05-28 08:41:04 +00:00
2008-06-22 20:23:23 +00:00
/**
* Enables showing of database errors .
*
* This function should be used only to enable showing of errors .
* wpdb :: hide_errors () should be used instead for hiding of errors . However ,
* this function can be used to enable and disable showing of database
* errors .
*
* @ since 0.71
2010-02-22 22:53:54 +00:00
* @ see wpdb :: hide_errors ()
2008-06-22 20:23:23 +00:00
*
* @ param bool $show Whether to show or hide errors
* @ return bool Old value for showing errors .
*/
2007-12-16 21:38:24 +00:00
function show_errors ( $show = true ) {
$errors = $this -> show_errors ;
$this -> show_errors = $show ;
return $errors ;
2004-04-26 02:28:06 +00:00
}
2006-02-12 07:53:23 +00:00
2008-06-22 20:23:23 +00:00
/**
* Disables showing of database errors .
*
2010-02-22 22:53:54 +00:00
* By default database errors are not shown .
*
2008-06-22 20:23:23 +00:00
* @ since 0.71
2010-02-22 22:53:54 +00:00
* @ see wpdb :: show_errors ()
2008-06-22 20:23:23 +00:00
*
2010-02-24 20:13:23 +00:00
* @ return bool Whether showing of errors was active
2008-06-22 20:23:23 +00:00
*/
2004-04-26 02:28:06 +00:00
function hide_errors () {
2007-12-16 21:38:24 +00:00
$show = $this -> show_errors ;
2004-04-26 02:28:06 +00:00
$this -> show_errors = false ;
2007-12-16 21:38:24 +00:00
return $show ;
2004-04-26 02:28:06 +00:00
}
2003-05-28 08:41:04 +00:00
2008-06-22 20:23:23 +00:00
/**
* Whether to suppress database errors .
*
2010-02-22 22:53:54 +00:00
* By default database errors are suppressed , with a simple
* call to this function they can be enabled .
*
* @ since 2.5
* @ see wpdb :: hide_errors ()
* @ param bool $suppress Optional . New value . Defaults to true .
* @ return bool Old value
2008-06-22 20:23:23 +00:00
*/
2008-03-12 22:41:43 +00:00
function suppress_errors ( $suppress = true ) {
$errors = $this -> suppress_errors ;
2010-02-22 22:53:54 +00:00
$this -> suppress_errors = ( bool ) $suppress ;
2008-03-12 22:41:43 +00:00
return $errors ;
}
2008-06-22 20:23:23 +00:00
/**
* Kill cached query results .
*
* @ since 0.71
2010-02-22 22:53:54 +00:00
* @ return void
2008-06-22 20:23:23 +00:00
*/
2004-04-26 02:28:06 +00:00
function flush () {
2006-08-11 22:23:03 +00:00
$this -> last_result = array ();
2010-02-22 22:53:54 +00:00
$this -> col_info = null ;
$this -> last_query = null ;
2004-04-26 02:28:06 +00:00
}
2003-05-28 08:41:04 +00:00
2010-08-26 18:34:18 +00:00
/**
* Connect to and select database
*/
function db_connect () {
2010-01-08 19:26:00 +00:00
global $db_list , $global_db_list ;
2010-10-14 18:47:39 +00:00
if ( WP_DEBUG ) {
$this -> dbh = mysql_connect ( $this -> dbhost , $this -> dbuser , $this -> dbpassword , true );
} else {
$this -> dbh = @ mysql_connect ( $this -> dbhost , $this -> dbuser , $this -> dbpassword , true );
}
2010-08-26 18:34:18 +00:00
if ( ! $this -> dbh ) {
2010-02-23 09:44:27 +00:00
$this -> bail ( sprintf ( /*WP_I18N_DB_CONN_ERROR*/ "
2010-01-08 19:26:00 +00:00
< h1 > Error establishing a database connection </ h1 >
2010-02-23 09:44:27 +00:00
< 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 >
2010-01-08 19:26:00 +00:00
< 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=' http :// wordpress . org / support / ' > WordPress Support Forums </ a >.</ p >
2010-08-26 18:34:18 +00:00
" /*/WP_I18N_DB_CONN_ERROR*/, $this->dbhost ), 'db_connect_fail' );
2010-10-14 18:47:39 +00:00
//If show errors is disabled then we need to die anyway as we don't have a working DB connection
die ();
2010-01-08 19:26:00 +00:00
}
2010-08-26 18:34:18 +00:00
$this -> set_charset ( $this -> dbh );
$this -> ready = true ;
$this -> select ( $this -> dbname , $this -> dbh );
2010-01-08 19:26:00 +00:00
}
2008-06-22 20:23:23 +00:00
/**
* Perform a MySQL database query , using current database connection .
*
* More information can be found on the codex page .
*
* @ since 0.71
*
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* @ param string $query Database query
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* @ return int | false Number of rows affected / selected or false on error
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*/
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function query ( $query ) {
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if ( ! $this -> ready )
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return false ;
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// some queries are made before the plugins have been loaded, and thus cannot be filtered with this method
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if ( function_exists ( 'apply_filters' ) )
$query = apply_filters ( 'query' , $query );
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$return_val = 0 ;
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$this -> flush ();
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// Log how the function was called
$this -> func_call = " \$ db->query( \" $query\ " ) " ;
// Keep track of the last query for debug..
$this -> last_query = $query ;
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if ( defined ( 'SAVEQUERIES' ) && SAVEQUERIES )
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$this -> timer_start ();
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$this -> result = @ mysql_query ( $query , $this -> dbh );
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$this -> num_queries ++ ;
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if ( defined ( 'SAVEQUERIES' ) && SAVEQUERIES )
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$this -> queries [] = array ( $query , $this -> timer_stop (), $this -> get_caller () );
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// If there is an error then take note of it..
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if ( $this -> last_error = mysql_error ( $this -> dbh ) ) {
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$this -> print_error ();
return false ;
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}
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if ( preg_match ( " /^ \\ s*(insert|delete|update|replace|alter) /i " , $query ) ) {
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$this -> rows_affected = mysql_affected_rows ( $this -> dbh );
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// Take note of the insert_id
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if ( preg_match ( " /^ \\ s*(insert|replace) /i " , $query ) ) {
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$this -> insert_id = mysql_insert_id ( $this -> dbh );
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}
// Return number of rows affected
$return_val = $this -> rows_affected ;
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} else {
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$i = 0 ;
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while ( $i < @ mysql_num_fields ( $this -> result ) ) {
$this -> col_info [ $i ] = @ mysql_fetch_field ( $this -> result );
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$i ++ ;
}
$num_rows = 0 ;
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while ( $row = @ mysql_fetch_object ( $this -> result ) ) {
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$this -> last_result [ $num_rows ] = $row ;
$num_rows ++ ;
}
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@ mysql_free_result ( $this -> result );
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// Log number of rows the query returned
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// and return number of rows selected
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$this -> num_rows = $num_rows ;
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$return_val = $num_rows ;
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}
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return $return_val ;
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}
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/**
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* Insert a row into a table .
*
* < code >
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* wpdb :: insert ( 'table' , array ( 'column' => 'foo' , 'field' => 'bar' ) )
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* wpdb :: insert ( 'table' , array ( 'column' => 'foo' , 'field' => 1337 ), array ( '%s' , '%d' ) )
* </ code >
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*
* @ since 2.5 . 0
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* @ see wpdb :: prepare ()
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* @ see wpdb :: $field_types
* @ see wp_set_wpdb_vars ()
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*
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* @ param string $table table name
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* @ param array $data Data to insert ( in column => value pairs ) . Both $data columns and $data values should be " raw " ( neither should be SQL escaped ) .
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* @ param array | string $format Optional . An array of formats to be mapped to each of the value in $data . If string , that format will be used for all of the values in $data .
* A format is one of '%d' , '%s' ( decimal number , string ) . If omitted , all values in $data will be treated as strings unless otherwise specified in wpdb :: $field_types .
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* @ return int | false The number of rows inserted , or false on error .
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*/
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function insert ( $table , $data , $format = null ) {
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return $this -> _insert_replace_helper ( $table , $data , $format , 'INSERT' );
}
/**
* Replace a row into a table .
*
* < code >
* wpdb :: replace ( 'table' , array ( 'column' => 'foo' , 'field' => 'bar' ) )
* wpdb :: replace ( 'table' , array ( 'column' => 'foo' , 'field' => 1337 ), array ( '%s' , '%d' ) )
* </ code >
*
* @ since 3.0 . 0
* @ see wpdb :: prepare ()
* @ see wpdb :: $field_types
* @ see wp_set_wpdb_vars ()
*
* @ param string $table table name
* @ param array $data Data to insert ( in column => value pairs ) . Both $data columns and $data values should be " raw " ( neither should be SQL escaped ) .
* @ param array | string $format Optional . An array of formats to be mapped to each of the value in $data . If string , that format will be used for all of the values in $data .
* A format is one of '%d' , '%s' ( decimal number , string ) . If omitted , all values in $data will be treated as strings unless otherwise specified in wpdb :: $field_types .
* @ return int | false The number of rows affected , or false on error .
*/
function replace ( $table , $data , $format = null ) {
return $this -> _insert_replace_helper ( $table , $data , $format , 'REPLACE' );
}
/**
* Helper function for insert and replace .
*
* Runs an insert or replace query based on $type argument .
*
* @ access private
* @ since 3.0 . 0
* @ see wpdb :: prepare ()
* @ see wpdb :: $field_types
* @ see wp_set_wpdb_vars ()
*
* @ param string $table table name
* @ param array $data Data to insert ( in column => value pairs ) . Both $data columns and $data values should be " raw " ( neither should be SQL escaped ) .
* @ param array | string $format Optional . An array of formats to be mapped to each of the value in $data . If string , that format will be used for all of the values in $data .
* A format is one of '%d' , '%s' ( decimal number , string ) . If omitted , all values in $data will be treated as strings unless otherwise specified in wpdb :: $field_types .
* @ return int | false The number of rows affected , or false on error .
*/
function _insert_replace_helper ( $table , $data , $format = null , $type = 'INSERT' ) {
if ( ! in_array ( strtoupper ( $type ), array ( 'REPLACE' , 'INSERT' ) ) )
return false ;
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$formats = $format = ( array ) $format ;
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$fields = array_keys ( $data );
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$formatted_fields = array ();
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foreach ( $fields as $field ) {
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if ( ! empty ( $format ) )
$form = ( $form = array_shift ( $formats ) ) ? $form : $format [ 0 ];
elseif ( isset ( $this -> field_types [ $field ] ) )
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$form = $this -> field_types [ $field ];
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else
$form = '%s' ;
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$formatted_fields [] = $form ;
}
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$sql = " { $type } INTO ` $table ` (` " . implode ( '`,`' , $fields ) . " `) VALUES (' " . implode ( " ',' " , $formatted_fields ) . " ') " ;
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return $this -> query ( $this -> prepare ( $sql , $data ) );
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}
/**
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* Update a row in the table
*
* < code >
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* wpdb :: update ( 'table' , array ( 'column' => 'foo' , 'field' => 'bar' ), array ( 'ID' => 1 ) )
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* wpdb :: update ( 'table' , array ( 'column' => 'foo' , 'field' => 1337 ), array ( 'ID' => 1 ), array ( '%s' , '%d' ), array ( '%d' ) )
* </ code >
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*
* @ since 2.5 . 0
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* @ see wpdb :: prepare ()
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* @ see wpdb :: $field_types
* @ see wp_set_wpdb_vars ()
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*
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* @ param string $table table name
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* @ param array $data Data to update ( in column => value pairs ) . Both $data columns and $data values should be " raw " ( neither should be SQL escaped ) .
* @ param array $where A named array of WHERE clauses ( in column => value pairs ) . Multiple clauses will be joined with ANDs . Both $where columns and $where values should be " raw " .
* @ param array | string $format Optional . An array of formats to be mapped to each of the values in $data . If string , that format will be used for all of the values in $data .
* A format is one of '%d' , '%s' ( decimal number , string ) . If omitted , all values in $data will be treated as strings unless otherwise specified in wpdb :: $field_types .
* @ param array | string $format_where Optional . An array of formats to be mapped to each of the values in $where . If string , that format will be used for all of the items in $where . A format is one of '%d' , '%s' ( decimal number , string ) . If omitted , all values in $where will be treated as strings .
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* @ return int | false The number of rows updated , or false on error .
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*/
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function update ( $table , $data , $where , $format = null , $where_format = null ) {
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if ( ! is_array ( $data ) || ! is_array ( $where ) )
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return false ;
$formats = $format = ( array ) $format ;
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$bits = $wheres = array ();
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foreach ( ( array ) array_keys ( $data ) as $field ) {
if ( ! empty ( $format ) )
$form = ( $form = array_shift ( $formats ) ) ? $form : $format [ 0 ];
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elseif ( isset ( $this -> field_types [ $field ]) )
$form = $this -> field_types [ $field ];
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else
$form = '%s' ;
$bits [] = " ` $field ` = { $form } " ;
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}
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$where_formats = $where_format = ( array ) $where_format ;
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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 [ $field ] ) )
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$form = $this -> field_types [ $field ];
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else
$form = '%s' ;
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$wheres [] = " ` $field ` = { $form } " ;
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}
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$sql = " UPDATE ` $table ` SET " . implode ( ', ' , $bits ) . ' WHERE ' . implode ( ' AND ' , $wheres );
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return $this -> query ( $this -> prepare ( $sql , array_merge ( array_values ( $data ), array_values ( $where ) ) ) );
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}
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/**
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* Retrieve one variable from the database .
*
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* Executes a SQL query and returns the value from the SQL result .
* If the SQL result contains more than one column and / or more than one row , this function returns the value in the column and row specified .
* If $query is null , this function returns the value in the specified column and row from the previous SQL result .
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*
* @ since 0.71
*
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* @ param string | null $query Optional . SQL query . Defaults to null , use the result from the previous query .
* @ param int $x Optional . Column of value to return . Indexed from 0.
* @ param int $y Optional . Row of value to return . Indexed from 0.
* @ return string | null Database query result ( as string ), or null on failure
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*/
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function get_var ( $query = null , $x = 0 , $y = 0 ) {
$this -> func_call = " \$ db->get_var( \" $query\ " , $x , $y ) " ;
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if ( $query )
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$this -> query ( $query );
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// Extract var out of cached results based x,y vals
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if ( ! empty ( $this -> last_result [ $y ] ) ) {
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$values = array_values ( get_object_vars ( $this -> last_result [ $y ] ) );
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}
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// If there is a value return it else return null
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return ( isset ( $values [ $x ] ) && $values [ $x ] !== '' ) ? $values [ $x ] : null ;
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}
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/**
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* Retrieve one row from the database .
*
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* Executes a SQL query and returns the row from the SQL result .
*
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* @ since 0.71
*
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* @ param string | null $query SQL query .
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* @ param string $output Optional . one of ARRAY_A | ARRAY_N | OBJECT constants . Return an associative array ( column => value , ... ),
* a numerically indexed array ( 0 => value , ... ) or an object ( -> column = value ), respectively .
* @ param int $y Optional . Row to return . Indexed from 0.
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* @ return mixed Database query result in format specifed by $output or null on failure
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*/
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function get_row ( $query = null , $output = OBJECT , $y = 0 ) {
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$this -> func_call = " \$ db->get_row( \" $query\ " , $output , $y ) " ;
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if ( $query )
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$this -> query ( $query );
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else
return null ;
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if ( ! isset ( $this -> last_result [ $y ] ) )
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return null ;
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if ( $output == OBJECT ) {
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return $this -> last_result [ $y ] ? $this -> last_result [ $y ] : null ;
} elseif ( $output == ARRAY_A ) {
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return $this -> last_result [ $y ] ? get_object_vars ( $this -> last_result [ $y ] ) : null ;
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} elseif ( $output == ARRAY_N ) {
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return $this -> last_result [ $y ] ? array_values ( get_object_vars ( $this -> last_result [ $y ] ) ) : null ;
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} else {
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$this -> print_error ( /*WP_I18N_DB_GETROW_ERROR*/ " \$ db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N " /*/WP_I18N_DB_GETROW_ERROR*/ );
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}
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}
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/**
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* Retrieve one column from the database .
*
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* Executes a SQL query and returns the column from the SQL result .
* If the SQL result contains more than one column , this function returns the column specified .
* If $query is null , this function returns the specified column from the previous SQL result .
*
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* @ since 0.71
*
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* @ param string | null $query Optional . SQL query . Defaults to previous query .
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* @ param int $x Optional . Column to return . Indexed from 0.
* @ return array Database query result . Array indexed from 0 by SQL result row number .
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*/
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function get_col ( $query = null , $x = 0 ) {
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if ( $query )
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$this -> query ( $query );
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$new_array = array ();
// Extract the column values
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for ( $i = 0 , $j = count ( $this -> last_result ); $i < $j ; $i ++ ) {
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$new_array [ $i ] = $this -> get_var ( null , $x , $i );
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}
return $new_array ;
}
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/**
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* Retrieve an entire SQL result set from the database ( i . e . , many rows )
*
* Executes a SQL query and returns the entire SQL result .
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*
* @ since 0.71
*
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* @ param string $query SQL query .
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* @ param string $output Optional . Any of ARRAY_A | ARRAY_N | OBJECT | OBJECT_K constants . With one of the first three , return an array of rows indexed from 0 by SQL result row number .
* Each row is an associative array ( column => value , ... ), a numerically indexed array ( 0 => value , ... ), or an object . ( -> column = value ), respectively .
* With OBJECT_K , return an associative array of row objects keyed by the value of each row 's first column' s value . Duplicate keys are discarded .
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* @ return mixed Database query results
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*/
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function get_results ( $query = null , $output = OBJECT ) {
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$this -> func_call = " \$ db->get_results( \" $query\ " , $output ) " ;
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if ( $query )
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$this -> query ( $query );
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else
return null ;
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$new_array = array ();
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if ( $output == OBJECT ) {
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// Return an integer-keyed array of row objects
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return $this -> last_result ;
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} elseif ( $output == OBJECT_K ) {
// Return an array of row objects with keys from column 1
// (Duplicates are discarded)
foreach ( $this -> last_result as $row ) {
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$key = array_shift ( $var_by_ref = get_object_vars ( $row ) );
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if ( ! isset ( $new_array [ $key ] ) )
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$new_array [ $key ] = $row ;
}
return $new_array ;
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} elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
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// Return an integer-keyed array of...
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if ( $this -> last_result ) {
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foreach ( ( array ) $this -> last_result as $row ) {
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if ( $output == ARRAY_N ) {
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// ...integer-keyed row arrays
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$new_array [] = array_values ( get_object_vars ( $row ) );
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} else {
// ...column name-keyed row arrays
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$new_array [] = get_object_vars ( $row );
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}
}
}
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return $new_array ;
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}
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return null ;
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}
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/**
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* Retrieve column metadata from the last query .
*
* @ since 0.71
*
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* @ param string $info_type Optional . Type one of name , table , def , max_length , not_null , primary_key , multiple_key , unique_key , numeric , blob , type , unsigned , zerofill
* @ param int $col_offset Optional . 0 : col name . 1 : which table the col 's in. 2: col' s max length . 3 : if the col is numeric . 4 : col ' s type
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* @ return mixed Column Results
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*/
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function get_col_info ( $info_type = 'name' , $col_offset = - 1 ) {
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if ( $this -> col_info ) {
if ( $col_offset == - 1 ) {
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$i = 0 ;
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$new_array = array ();
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foreach ( ( array ) $this -> col_info as $col ) {
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$new_array [ $i ] = $col -> { $info_type };
$i ++ ;
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}
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return $new_array ;
} else {
return $this -> col_info [ $col_offset ] -> { $info_type };
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}
}
}
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/**
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* Starts the timer , for debugging purposes .
*
* @ since 1.5 . 0
*
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* @ return true
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*/
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function timer_start () {
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$mtime = explode ( ' ' , microtime () );
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$this -> time_start = $mtime [ 1 ] + $mtime [ 0 ];
return true ;
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}
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/**
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* Stops the debugging timer .
*
* @ since 1.5 . 0
*
* @ return int Total time spent on the query , in milliseconds
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*/
function timer_stop () {
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$mtime = explode ( ' ' , microtime () );
$time_end = $mtime [ 1 ] + $mtime [ 0 ];
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$time_total = $time_end - $this -> time_start ;
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return $time_total ;
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}
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/**
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* Wraps errors in a nice header and footer and dies .
*
* Will not die if wpdb :: $show_errors is true
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*
* @ since 1.5 . 0
*
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* @ param string $message The Error message
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* @ param string $error_code Optional . A Computer readable string to identify the error .
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* @ return false | void
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*/
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function bail ( $message , $error_code = '500' ) {
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if ( ! $this -> show_errors ) {
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if ( class_exists ( 'WP_Error' ) )
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$this -> error = new WP_Error ( $error_code , $message );
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else
$this -> error = $message ;
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return false ;
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}
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wp_die ( $message );
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}
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/**
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* Whether MySQL database is at least the required minimum version .
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*
* @ since 2.5 . 0
* @ uses $wp_version
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* @ uses $required_mysql_version
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*
* @ return WP_Error
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*/
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function check_database_version () {
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global $wp_version , $required_mysql_version ;
// Make sure the server has the required MySQL version
if ( version_compare ( $this -> db_version (), $required_mysql_version , '<' ) )
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return new WP_Error ( 'database_version' , sprintf ( __ ( '<strong>ERROR</strong>: WordPress %1$s requires MySQL %2$s or higher' ), $wp_version , $required_mysql_version ));
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}
/**
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* Whether the database supports collation .
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*
* Called when WordPress is generating the table scheme .
*
* @ since 2.5 . 0
*
* @ return bool True if collation is supported , false if version does not
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*/
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function supports_collation () {
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return $this -> has_cap ( 'collation' );
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}
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/**
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* Determine if a database supports a particular feature
*
* @ since 2.7
* @ see wpdb :: db_version ()
*
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* @ param string $db_cap the feature
* @ return bool
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*/
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function has_cap ( $db_cap ) {
$version = $this -> db_version ();
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switch ( strtolower ( $db_cap ) ) {
case 'collation' : // @since 2.5.0
case 'group_concat' : // @since 2.7
case 'subqueries' : // @since 2.7
return version_compare ( $version , '4.1' , '>=' );
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case 'set_charset' :
return version_compare ( $version , '5.0.7' , '>=' );
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};
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return false ;
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}
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/**
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* Retrieve the name of the function that called wpdb .
*
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* Searches up the list of functions until it reaches
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* the one that would most logically had called this method .
*
* @ since 2.5 . 0
*
* @ return string The name of the calling function
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*/
function get_caller () {
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$trace = array_reverse ( debug_backtrace () );
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$caller = array ();
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foreach ( $trace as $call ) {
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if ( isset ( $call [ 'class' ] ) && __CLASS__ == $call [ 'class' ] )
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continue ; // Filter out wpdb calls.
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$caller [] = isset ( $call [ 'class' ] ) ? " { $call [ 'class' ] } -> { $call [ 'function' ] } " : $call [ 'function' ];
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}
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return join ( ', ' , $caller );
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}
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/**
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* The database version number .
*
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* @ return false | string false on failure , version number on success
*/
function db_version () {
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return preg_replace ( '/[^0-9.].*/' , '' , mysql_get_server_info ( $this -> dbh ) );
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}
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}
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?>