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779a3e76dd
git-svn-id: http://svn.automattic.com/wordpress/trunk@13578 1a063a9b-81f0-0310-95a4-ce76da25c4cd
1573 lines
44 KiB
PHP
1573 lines
44 KiB
PHP
<?php
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/**
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* WordPress DB Class
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*
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* Original code from {@link http://php.justinvincent.com Justin Vincent (justin@visunet.ie)}
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*
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* @package WordPress
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* @subpackage Database
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* @since 0.71
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*/
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/**
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* @since 0.71
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*/
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define( 'EZSQL_VERSION', 'WP1.25' );
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/**
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* @since 0.71
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*/
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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', false );
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/**
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* @since 0.71
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*/
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define( 'ARRAY_A', 'ARRAY_A', false );
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/**
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* @since 0.71
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*/
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define( 'ARRAY_N', 'ARRAY_N', false );
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/**
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* WordPress Database Access Abstraction Object
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*
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* 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
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* this file will not be included, if the other file is
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* available.
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*
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* @link http://codex.wordpress.org/Function_Reference/wpdb_Class
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*
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* @package WordPress
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* @subpackage Database
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* @since 0.71
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* @final
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*/
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class wpdb {
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/**
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* Whether to show SQL/DB errors
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*
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* @since 0.71
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* @access private
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* @var bool
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*/
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var $show_errors = false;
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/**
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* Whether to suppress errors during the DB bootstrapping.
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*
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* @access private
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* @since 2.5
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* @var bool
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*/
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var $suppress_errors = false;
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/**
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* The last error during query.
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*
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* @see get_last_error()
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* @since 2.5
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* @access private
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* @var string
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*/
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var $last_error = '';
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/**
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* Amount of queries made
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*
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* @since 1.2.0
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* @access private
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* @var int
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*/
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var $num_queries = 0;
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/**
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* Count of rows returned by previous query
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*
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* @since 1.2
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* @access private
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* @var int
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*/
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var $num_rows = 0;
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/**
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* Count of affected rows by previous query
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*
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* @since 0.71
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* @access private
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* @var int
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*/
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var $rows_affected = 0;
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/**
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* Saved result of the last query made
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*
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* @since 1.2.0
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* @access private
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* @var array
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*/
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var $last_query;
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/**
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* Results of the last query made
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*
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* @since 1.0.0
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* @access private
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* @var array|null
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*/
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var $last_result;
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/**
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* Saved info on the table column
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*
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* @since 1.2.0
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* @access private
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* @var array
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*/
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var $col_info;
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/**
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* Saved queries that were executed
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*
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* @since 1.5.0
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* @access private
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* @var array
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*/
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var $queries;
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/**
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* WordPress table prefix
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*
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* You can set this to have multiple WordPress installations
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* in a single database. The second reason is for possible
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* security precautions.
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*
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* @since 0.71
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* @access private
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* @var string
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*/
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var $prefix = '';
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/**
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* Whether the database queries are ready to start executing.
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*
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* @since 2.5.0
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* @access private
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* @var bool
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*/
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var $ready = false;
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/**
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* {@internal Missing Description}}
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*
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* @since 3.0.0
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* @access public
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* @var int
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*/
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var $blogid = 0;
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/**
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* {@internal Missing Description}}
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*
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* @since 3.0.0
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* @access public
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* @var int
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*/
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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
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* @see wpdb::tables()
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* @var array
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*/
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var $tables = array( 'posts', 'comments', 'links', 'options', 'postmeta',
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'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
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*
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* @since 2.9.0
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* @access private
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* @see wpdb::tables()
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* @var array
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*/
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var $old_tables = array( 'categories', 'post2cat', 'link2cat' );
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/**
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* List of WordPress global tables
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*
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* @since 3.0.0
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* @access private
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* @see wpdb::tables()
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* @var array
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*/
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var $global_tables = array( 'users', 'usermeta' );
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/**
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* List of Multisite global tables
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*
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* @since 3.0.0
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* @access private
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* @see wpdb::tables()
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* @var array
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*/
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var $ms_global_tables = array( 'blogs', 'signups', 'site', 'sitemeta',
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'sitecategories', 'registration_log', 'blog_versions' );
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/**
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* WordPress Comments table
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*
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* @since 1.5.0
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* @access public
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* @var string
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*/
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var $comments;
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/**
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* WordPress Comment Metadata table
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*
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* @since 2.9.0
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* @access public
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* @var string
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*/
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var $commentmeta;
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/**
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* WordPress Links table
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*
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* @since 1.5.0
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* @access public
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* @var string
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*/
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var $links;
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/**
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* WordPress Options table
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*
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* @since 1.5.0
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* @access public
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* @var string
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*/
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var $options;
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/**
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* WordPress Post Metadata table
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*
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* @since 1.5.0
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* @access public
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* @var string
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*/
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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
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* @var string
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*/
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var $posts;
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/**
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* WordPress Terms table
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*
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* @since 2.3.0
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* @access public
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* @var string
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*/
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var $terms;
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/**
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* WordPress Term Relationships table
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*
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* @since 2.3.0
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* @access public
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* @var string
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*/
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var $term_relationships;
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/**
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* WordPress Term Taxonomy table
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*
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* @since 2.3.0
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* @access public
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* @var string
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*/
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var $term_taxonomy;
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/*
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* Global and Multisite tables
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*/
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/**
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* WordPress User Metadata table
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*
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* @since 2.3.0
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* @access public
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* @var string
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*/
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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
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* @access public
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* @var string
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*/
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var $users;
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/**
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* Multisite Blogs table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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var $blogs;
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/**
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* Multisite Blog Versions table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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var $blog_versions;
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/**
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* Multisite Registration Log table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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var $registration_log;
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/**
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* Multisite Signups table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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var $signups;
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/**
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* Multisite Sites table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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var $site;
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/**
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* Multisite Sitewide Terms table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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var $sitecategories;
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/**
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* Multisite Site Metadata table
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*
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* @since 3.0.0
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* @access public
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* @var string
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*/
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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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*
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* @since 2.8.0
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* @see wpdb:prepare()
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* @see wpdb:insert()
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* @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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/**
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* Database table columns charset
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*
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* @since 2.2.0
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* @access public
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* @var string
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*/
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var $charset;
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/**
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* Database table columns collate
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*
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* @since 2.2.0
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* @access public
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* @var string
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*/
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var $collate;
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/**
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* Whether to use mysql_real_escape_string
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*
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* @since 2.8.0
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* @access public
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* @var bool
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*/
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var $real_escape = false;
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/**
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* Database Username
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*
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* @since 2.9.0
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* @access private
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* @var string
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*/
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var $dbuser;
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/**
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* Connects to the database server and selects a database
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*
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* PHP4 compatibility layer for calling the PHP5 constructor.
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*
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* @uses wpdb::__construct() Passes parameters and returns result
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* @since 0.71
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*
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* @param string $dbuser MySQL database user
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* @param string $dbpassword MySQL database password
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* @param string $dbname MySQL database name
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* @param string $dbhost MySQL database host
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*/
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function wpdb( $dbuser, $dbpassword, $dbname, $dbhost ) {
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if( defined( 'WP_USE_MULTIPLE_DB' ) && WP_USE_MULTIPLE_DB )
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$this->db_connect();
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return $this->__construct( $dbuser, $dbpassword, $dbname, $dbhost );
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}
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/**
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* Connects to the database server and selects a database
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*
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* PHP5 style constructor for compatibility with PHP5. Does
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* the actual setting up of the class properties and connection
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* to the database.
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*
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* @link http://core.trac.wordpress.org/ticket/3354
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* @since 2.0.8
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*
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* @param string $dbuser MySQL database user
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* @param string $dbpassword MySQL database password
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* @param string $dbname MySQL database name
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* @param string $dbhost MySQL database host
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*/
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function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) {
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register_shutdown_function( array( &$this, '__destruct' ) );
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if ( WP_DEBUG )
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$this->show_errors();
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if ( is_multisite() ) {
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$this->charset = 'utf8';
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if ( defined( 'DB_COLLATE' ) && DB_COLLATE )
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$this->collate = DB_COLLATE;
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else
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$this->collate = 'utf8_general_ci';
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} elseif ( defined( 'DB_COLLATE' ) ) {
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$this->collate = DB_COLLATE;
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}
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if ( defined( 'DB_CHARSET' ) )
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$this->charset = DB_CHARSET;
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$this->dbuser = $dbuser;
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$this->dbh = @mysql_connect( $dbhost, $dbuser, $dbpassword, true );
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if ( !$this->dbh ) {
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$this->bail( sprintf( /*WP_I18N_DB_CONN_ERROR*/"
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<h1>Error establishing a database connection</h1>
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<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>
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<ul>
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<li>Are you sure you have the correct username and password?</li>
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<li>Are you sure that you have typed the correct hostname?</li>
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<li>Are you sure that the database server is running?</li>
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</ul>
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<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>
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"/*/WP_I18N_DB_CONN_ERROR*/, $dbhost ), 'db_connect_fail' );
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return;
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}
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$this->ready = true;
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if ( $this->has_cap( 'collation' ) && !empty( $this->charset ) ) {
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if ( function_exists( 'mysql_set_charset' ) ) {
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mysql_set_charset( $this->charset, $this->dbh );
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$this->real_escape = true;
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} else {
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$query = $this->prepare( 'SET NAMES %s', $this->charset );
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if ( ! empty( $this->collate ) )
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$query .= $this->prepare( ' COLLATE %s', $this->collate );
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$this->query( $query );
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}
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}
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$this->select( $dbname, $this->dbh );
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}
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/**
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* PHP5 style destructor and will run when database object is destroyed.
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*
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* @see wpdb::__construct()
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* @since 2.0.8
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* @return bool true
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*/
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function __destruct() {
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return true;
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}
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|
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/**
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* Sets the table prefix for the WordPress tables.
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*
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* @since 2.5.0
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*
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* @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 ) {
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foreach ( $this->tables( 'global' ) as $table => $prefixed_table )
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$this->$table = $prefixed_table;
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if ( defined( 'VHOST' ) && empty( $this->blogid ) )
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return $old_prefix;
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$this->prefix = $this->get_blog_prefix( $this->blogid );
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foreach ( $this->tables( 'blog' ) as $table => $prefixed_table )
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$this->$table = $prefixed_table;
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foreach ( $this->tables( 'old' ) as $table => $prefixed_table )
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$this->$table = $prefixed_table;
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}
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return $old_prefix;
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}
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|
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/**
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* Sets blog id.
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*
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* @since 3.0.0
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* @access public
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* @param int $blog_id
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* @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( $this->blogid );
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foreach ( $this->tables( 'blog' ) as $table => $prefixed_table )
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$this->$table = $prefixed_table;
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foreach ( $this->tables( 'old' ) as $table => $prefixed_table )
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$this->$table = $prefixed_table;
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return $old_blog_id;
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}
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|
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/**
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* Gets blog prefix.
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*
|
|
* @uses is_multisite()
|
|
* @since 3.0.0
|
|
* @param int $blog_id Optional.
|
|
* @return string Blog prefix.
|
|
*/
|
|
function get_blog_prefix( $blog_id = 0 ) {
|
|
if ( is_multisite() && $blog_id ) {
|
|
if ( defined( 'MULTISITE' ) && ( 0 == $blog_id || 1 == $blog_id ) )
|
|
return $this->base_prefix;
|
|
else
|
|
return $this->base_prefix . $blog_id . '_';
|
|
} else {
|
|
return $this->base_prefix;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an array of WordPress tables.
|
|
*
|
|
* Also allows for the CUSTOM_USER_TABLE and CUSTOM_USER_META_TABLE to
|
|
* override the WordPress users and usersmeta tables that would otherwise
|
|
* be determined by the prefix.
|
|
*
|
|
* The scope argument can take one of the following:
|
|
*
|
|
* 'all' - returns 'all' and 'global' tables. No old tables are returned.
|
|
* 'blog' - returns the blog-level tables for the queried blog.
|
|
* 'global' - returns the global tables for the installation, returning multisite tables only if running multisite.
|
|
* 'ms_global' - returns the multisite global tables, regardless if current installation is multisite.
|
|
* 'old' - returns tables which are deprecated.
|
|
*
|
|
* @since 3.0.0
|
|
* @uses wpdb::$tables
|
|
* @uses wpdb::$old_tables
|
|
* @uses wpdb::$global_tables
|
|
* @uses wpdb::$ms_global_tables
|
|
* @uses is_multisite()
|
|
*
|
|
* @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
|
|
* prefix is requested, then the custom users and usermeta tables will be mapped.
|
|
* @param int $blog_id Optional. The blog_id to prefix. Defaults to wpdb::$blogid. Used only when prefix is requested.
|
|
* @return array Table names. When a prefix is requested, the key is the unprefixed table name.
|
|
*/
|
|
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();
|
|
break;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* @return null Always null.
|
|
*/
|
|
function select( $db, &$dbh ) {
|
|
if ( !@mysql_select_db( $db, $dbh ) ) {
|
|
$this->ready = false;
|
|
$this->bail( sprintf( /*WP_I18N_DB_SELECT_DB*/'
|
|
<h1>Can’t select database</h1>
|
|
<p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>%1$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 setup 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' );
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Weak escape, using addslashes()
|
|
*
|
|
* @see addslashes()
|
|
* @since 2.8.0
|
|
* @access private
|
|
*
|
|
* @param string $string
|
|
* @return string
|
|
*/
|
|
function _weak_escape( $string ) {
|
|
return addslashes( $string );
|
|
}
|
|
|
|
/**
|
|
* Real escape, using mysql_real_escape_string() or addslashes()
|
|
*
|
|
* @see mysql_real_escape_string()
|
|
* @see addslashes()
|
|
* @since 2.8
|
|
* @access private
|
|
*
|
|
* @param string $string to escape
|
|
* @return string escaped
|
|
*/
|
|
function _real_escape( $string ) {
|
|
if ( $this->dbh && $this->real_escape )
|
|
return mysql_real_escape_string( $string, $this->dbh );
|
|
else
|
|
return addslashes( $string );
|
|
}
|
|
|
|
/**
|
|
* Escape data. Works on arrays.
|
|
*
|
|
* @uses wpdb::_escape()
|
|
* @uses wpdb::_real_escape()
|
|
* @since 2.8
|
|
* @access private
|
|
*
|
|
* @param string|array $data
|
|
* @return string|array escaped
|
|
*/
|
|
function _escape( $data ) {
|
|
if ( is_array( $data ) ) {
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Escapes content for insertion into the database using addslashes(), for security.
|
|
*
|
|
* Works on arrays.
|
|
*
|
|
* @since 0.71
|
|
* @param string|array $data to escape
|
|
* @return string|array escaped as query safe string
|
|
*/
|
|
function escape( $data ) {
|
|
if ( is_array( $data ) ) {
|
|
foreach ( (array) $data as $k => $v ) {
|
|
if ( is_array( $v ) )
|
|
$data[$k] = $this->escape( $v );
|
|
else
|
|
$data[$k] = $this->_weak_escape( $v );
|
|
}
|
|
} else {
|
|
$data = $this->_weak_escape( $data );
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Escapes content by reference for insertion into the database, for security
|
|
*
|
|
* @uses wpdb::_real_escape()
|
|
* @since 2.3.0
|
|
* @param string $string to escape
|
|
* @return void
|
|
*/
|
|
function escape_by_ref( &$string ) {
|
|
$string = $this->_real_escape( $string );
|
|
}
|
|
|
|
/**
|
|
* Prepares a SQL query for safe execution. Uses sprintf()-like syntax.
|
|
*
|
|
* The following directives can be used in the query format string:
|
|
* %d (decimal number)
|
|
* %s (string)
|
|
* %% (literal percentage sign - no argument needed)
|
|
*
|
|
* 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 %%.
|
|
*
|
|
* 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>
|
|
* 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' );
|
|
* </code>
|
|
*
|
|
* @link http://php.net/sprintf Description of syntax.
|
|
* @since 2.3.0
|
|
*
|
|
* @param string $query Query statement with sprintf()-like placeholders
|
|
* @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 )
|
|
if ( is_null( $query ) )
|
|
return;
|
|
|
|
$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( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s
|
|
array_walk( $args, array( &$this, 'escape_by_ref' ) );
|
|
return @vsprintf( $query, $args );
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
function print_error( $str = '' ) {
|
|
global $EZSQL_ERROR;
|
|
|
|
if ( !$str )
|
|
$str = mysql_error( $this->dbh );
|
|
$EZSQL_ERROR[] = array( 'query' => $this->last_query, 'error_str' => $str );
|
|
|
|
if ( $this->suppress_errors )
|
|
return false;
|
|
|
|
if ( $caller = $this->get_caller() )
|
|
$error_str = sprintf( /*WP_I18N_DB_QUERY_ERROR_FULL*/'WordPress database error %1$s for query %2$s made by %3$s'/*/WP_I18N_DB_QUERY_ERROR_FULL*/, $str, $this->last_query, $caller );
|
|
else
|
|
$error_str = sprintf( /*WP_I18N_DB_QUERY_ERROR*/'WordPress database error %1$s for query %2$s'/*/WP_I18N_DB_QUERY_ERROR*/, $str, $this->last_query );
|
|
|
|
if ( function_exists( 'error_log' )
|
|
&& ( $log_file = @ini_get( 'error_log' ) )
|
|
&& ( 'syslog' == $log_file || @is_writable( $log_file ) )
|
|
)
|
|
@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 />
|
|
<code>$query</code></p>
|
|
</div>";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* @see wpdb::hide_errors()
|
|
*
|
|
* @param bool $show Whether to show or hide errors
|
|
* @return bool Old value for showing errors.
|
|
*/
|
|
function show_errors( $show = true ) {
|
|
$errors = $this->show_errors;
|
|
$this->show_errors = $show;
|
|
return $errors;
|
|
}
|
|
|
|
/**
|
|
* Disables showing of database errors.
|
|
*
|
|
* By default database errors are not shown.
|
|
*
|
|
* @since 0.71
|
|
* @see wpdb::show_errors()
|
|
*
|
|
* @return bool Whether showing of errors was active
|
|
*/
|
|
function hide_errors() {
|
|
$show = $this->show_errors;
|
|
$this->show_errors = false;
|
|
return $show;
|
|
}
|
|
|
|
/**
|
|
* Whether to suppress database errors.
|
|
*
|
|
* 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
|
|
*/
|
|
function suppress_errors( $suppress = true ) {
|
|
$errors = $this->suppress_errors;
|
|
$this->suppress_errors = (bool) $suppress;
|
|
return $errors;
|
|
}
|
|
|
|
/**
|
|
* Kill cached query results.
|
|
*
|
|
* @since 0.71
|
|
* @return void
|
|
*/
|
|
function flush() {
|
|
$this->last_result = array();
|
|
$this->col_info = null;
|
|
$this->last_query = null;
|
|
}
|
|
|
|
function db_connect( $query = "SELECT" ) {
|
|
global $db_list, $global_db_list;
|
|
if ( ! is_array( $db_list ) )
|
|
return true;
|
|
|
|
if ( $this->blogs != '' && preg_match("/(" . $this->blogs . "|" . $this->users . "|" . $this->usermeta . "|" . $this->site . "|" . $this->sitemeta . "|" . $this->sitecategories . ")/i",$query) ) {
|
|
$action = 'global';
|
|
$details = $global_db_list[ mt_rand( 0, count( $global_db_list ) -1 ) ];
|
|
$this->db_global = $details;
|
|
} elseif ( preg_match("/^\\s*(alter table|create|insert|delete|update|replace) /i",$query) ) {
|
|
$action = 'write';
|
|
$details = $db_list[ 'write' ][ mt_rand( 0, count( $db_list[ 'write' ] ) -1 ) ];
|
|
$this->db_write = $details;
|
|
} else {
|
|
$action = '';
|
|
$details = $db_list[ 'read' ][ mt_rand( 0, count( $db_list[ 'read' ] ) -1 ) ];
|
|
$this->db_read = $details;
|
|
}
|
|
|
|
$dbhname = "dbh" . $action;
|
|
$this->$dbhname = @mysql_connect( $details[ 'db_host' ], $details[ 'db_user' ], $details[ 'db_password' ] );
|
|
if (!$this->$dbhname ) {
|
|
$this->bail( sprintf( /*WP_I18N_DB_CONN_ERROR*/"
|
|
<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='http://wordpress.org/support/'>WordPress Support Forums</a>.</p>
|
|
"/*/WP_I18N_DB_CONN_ERROR*/, $details['db_host'] ), 'db_connect_fail' );
|
|
}
|
|
$this->select( $details[ 'db_name' ], $this->$dbhname );
|
|
}
|
|
|
|
/**
|
|
* Perform a MySQL database query, using current database connection.
|
|
*
|
|
* More information can be found on the codex page.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $query Database query
|
|
* @return int|false Number of rows affected/selected or false on error
|
|
*/
|
|
function query( $query ) {
|
|
if ( ! $this->ready )
|
|
return false;
|
|
|
|
// some queries are made before the plugins have been loaded, and thus cannot be filtered with this method
|
|
if ( function_exists( 'apply_filters' ) )
|
|
$query = apply_filters( 'query', $query );
|
|
|
|
$return_val = 0;
|
|
$this->flush();
|
|
|
|
// Log how the function was called
|
|
$this->func_call = "\$db->query(\"$query\")";
|
|
|
|
// Keep track of the last query for debug..
|
|
$this->last_query = $query;
|
|
|
|
if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES )
|
|
$this->timer_start();
|
|
|
|
// use $this->dbh for read ops, and $this->dbhwrite for write ops
|
|
// use $this->dbhglobal for gloal table ops
|
|
unset( $dbh );
|
|
if( defined( 'WP_USE_MULTIPLE_DB' ) && WP_USE_MULTIPLE_DB ) {
|
|
if( $this->blogs != '' && preg_match("/(" . $this->blogs . "|" . $this->users . "|" . $this->usermeta . "|" . $this->site . "|" . $this->sitemeta . "|" . $this->sitecategories . ")/i",$query) ) {
|
|
if( false == isset( $this->dbhglobal ) ) {
|
|
$this->db_connect( $query );
|
|
}
|
|
$dbh =& $this->dbhglobal;
|
|
$this->last_db_used = "global";
|
|
} elseif ( preg_match("/^\\s*(alter table|create|insert|delete|update|replace) /i",$query) ) {
|
|
if( false == isset( $this->dbhwrite ) ) {
|
|
$this->db_connect( $query );
|
|
}
|
|
$dbh =& $this->dbhwrite;
|
|
$this->last_db_used = "write";
|
|
} else {
|
|
$dbh =& $this->dbh;
|
|
$this->last_db_used = "read";
|
|
}
|
|
} else {
|
|
$dbh =& $this->dbh;
|
|
$this->last_db_used = "other/read";
|
|
}
|
|
|
|
$this->result = @mysql_query( $query, $dbh );
|
|
$this->num_queries++;
|
|
|
|
if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES )
|
|
$this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() );
|
|
|
|
// If there is an error then take note of it..
|
|
if ( $this->last_error = mysql_error( $dbh ) ) {
|
|
$this->print_error();
|
|
return false;
|
|
}
|
|
|
|
if ( preg_match( "/^\\s*(insert|delete|update|replace|alter) /i", $query ) ) {
|
|
$this->rows_affected = mysql_affected_rows( $dbh );
|
|
// Take note of the insert_id
|
|
if ( preg_match( "/^\\s*(insert|replace) /i", $query ) ) {
|
|
$this->insert_id = mysql_insert_id($dbh);
|
|
}
|
|
// Return number of rows affected
|
|
$return_val = $this->rows_affected;
|
|
} else {
|
|
$i = 0;
|
|
while ( $i < @mysql_num_fields( $this->result ) ) {
|
|
$this->col_info[$i] = @mysql_fetch_field( $this->result );
|
|
$i++;
|
|
}
|
|
$num_rows = 0;
|
|
while ( $row = @mysql_fetch_object( $this->result ) ) {
|
|
$this->last_result[$num_rows] = $row;
|
|
$num_rows++;
|
|
}
|
|
|
|
@mysql_free_result( $this->result );
|
|
|
|
// Log number of rows the query returned
|
|
// and return number of rows selected
|
|
$this->num_rows = $num_rows;
|
|
$return_val = $num_rows;
|
|
}
|
|
|
|
return $return_val;
|
|
}
|
|
|
|
/**
|
|
* Insert a row into a table.
|
|
*
|
|
* <code>
|
|
* wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 'bar' ) )
|
|
* wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) )
|
|
* </code>
|
|
*
|
|
* @since 2.5.0
|
|
* @see wpdb::prepare()
|
|
* @see wpdb::$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 inserted, or false on error.
|
|
*/
|
|
function insert( $table, $data, $format = null ) {
|
|
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;
|
|
$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, $data ) );
|
|
}
|
|
|
|
/**
|
|
* Update a row in the table
|
|
*
|
|
* <code>
|
|
* wpdb::update( 'table', array( 'column' => 'foo', 'field' => 'bar' ), array( 'ID' => 1 ) )
|
|
* wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) )
|
|
* </code>
|
|
*
|
|
* @since 2.5.0
|
|
* @see wpdb::prepare()
|
|
* @see wpdb::$field_types
|
|
* @see wp_set_wpdb_vars()
|
|
*
|
|
* @param string $table table name
|
|
* @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.
|
|
* @return int|false The number of rows updated, or false on error.
|
|
*/
|
|
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 ) ) ) );
|
|
}
|
|
|
|
/**
|
|
* Retrieve one variable from the database.
|
|
*
|
|
* 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.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @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
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Retrieve one row from the database.
|
|
*
|
|
* Executes a SQL query and returns the row from the SQL result.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string|null $query SQL query.
|
|
* @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.
|
|
* @return mixed Database query result in format specifed by $output or null on failure
|
|
*/
|
|
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;
|
|
} else {
|
|
$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*/);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieve one column from the database.
|
|
*
|
|
* 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.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string|null $query Optional. SQL query. Defaults to previous query.
|
|
* @param int $x Optional. Column to return. Indexed from 0.
|
|
* @return array Database query result. Array indexed from 0 by SQL result row number.
|
|
*/
|
|
function get_col( $query = null , $x = 0 ) {
|
|
if ( $query )
|
|
$this->query( $query );
|
|
|
|
$new_array = array();
|
|
// Extract the column values
|
|
for ( $i=0; $i < count( $this->last_result ); $i++ ) {
|
|
$new_array[$i] = $this->get_var( null, $x, $i );
|
|
}
|
|
return $new_array;
|
|
}
|
|
|
|
/**
|
|
* Retrieve an entire SQL result set from the database (i.e., many rows)
|
|
*
|
|
* Executes a SQL query and returns the entire SQL result.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $query SQL query.
|
|
* @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.
|
|
* @return mixed Database query results
|
|
*/
|
|
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 ) {
|
|
$key = array_shift( get_object_vars( $row ) );
|
|
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 ) {
|
|
$i = 0;
|
|
foreach( (array) $this->last_result as $row ) {
|
|
if ( $output == ARRAY_N ) {
|
|
// ...integer-keyed row arrays
|
|
$new_array[$i] = array_values( get_object_vars( $row ) );
|
|
} else {
|
|
// ...column name-keyed row arrays
|
|
$new_array[$i] = get_object_vars( $row );
|
|
}
|
|
++$i;
|
|
}
|
|
return $new_array;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieve column metadata from the last query.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @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
|
|
* @return mixed Column Results
|
|
*/
|
|
function get_col_info( $info_type = 'name', $col_offset = -1 ) {
|
|
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};
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Starts the timer, for debugging purposes.
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @return true
|
|
*/
|
|
function timer_start() {
|
|
$mtime = explode( ' ', microtime() );
|
|
$this->time_start = $mtime[1] + $mtime[0];
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Stops the debugging timer.
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @return int Total time spent on the query, in milliseconds
|
|
*/
|
|
function timer_stop() {
|
|
$mtime = explode( ' ', microtime() );
|
|
$time_end = $mtime[1] + $mtime[0];
|
|
$time_total = $time_end - $this->time_start;
|
|
return $time_total;
|
|
}
|
|
|
|
/**
|
|
* Wraps errors in a nice header and footer and dies.
|
|
*
|
|
* Will not die if wpdb::$show_errors is true
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $message The Error message
|
|
* @param string $error_code Optional. A Computer readable string to identify the error.
|
|
* @return false|void
|
|
*/
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* Whether MySQL database is at least the required minimum version.
|
|
*
|
|
* @since 2.5.0
|
|
* @uses $wp_version
|
|
* @uses $required_mysql_version
|
|
*
|
|
* @return WP_Error
|
|
*/
|
|
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 ));
|
|
}
|
|
|
|
/**
|
|
* Whether the database supports collation.
|
|
*
|
|
* Called when WordPress is generating the table scheme.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @return bool True if collation is supported, false if version does not
|
|
*/
|
|
function supports_collation() {
|
|
return $this->has_cap( 'collation' );
|
|
}
|
|
|
|
/**
|
|
* Determine if a database supports a particular feature
|
|
*
|
|
* @since 2.7
|
|
* @see wpdb::db_version()
|
|
*
|
|
* @param string $db_cap the feature
|
|
* @return bool
|
|
*/
|
|
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
|
|
case 'subqueries' : // @since 2.7
|
|
return version_compare( $version, '4.1', '>=' );
|
|
};
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the name of the function that called wpdb.
|
|
*
|
|
* Searches up the list of functions until it reaches
|
|
* the one that would most logically had called this method.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @return string The name of the calling function
|
|
*/
|
|
function get_caller() {
|
|
$trace = array_reverse( debug_backtrace() );
|
|
$caller = array();
|
|
|
|
foreach ( $trace as $call ) {
|
|
if ( isset( $call['class'] ) && __CLASS__ == $call['class'] )
|
|
continue; // Filter out wpdb calls.
|
|
$caller[] = isset( $call['class'] ) ? "{$call['class']}->{$call['function']}" : $call['function'];
|
|
}
|
|
|
|
return join( ', ', $caller );
|
|
}
|
|
|
|
/**
|
|
* The database version number.
|
|
*
|
|
* @return false|string false on failure, version number on success
|
|
*/
|
|
function db_version() {
|
|
return preg_replace( '/[^0-9.].*/', '', mysql_get_server_info( $this->dbh ) );
|
|
}
|
|
}
|
|
|
|
if ( ! isset($wpdb) ) {
|
|
/**
|
|
* WordPress Database Object, if it isn't set already in wp-content/db.php
|
|
* @global object $wpdb Creates a new wpdb object based on wp-config.php Constants for the database
|
|
* @since 0.71
|
|
*/
|
|
$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
|
|
}
|
|
?>
|