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<?php
/**
* WordPress database access abstraction class.
*
* Original code from {@link http://php.justinvincent.com Justin Vincent (justin@visunet.ie)}
*
* @package WordPress
* @subpackage Database
* @since 0.71
*/
/**
* @since 0.71
*/
define( 'EZSQL_VERSION', 'WP1.25' );
/**
* @since 0.71
*/
define( 'OBJECT', 'OBJECT' );
// phpcs:ignore Generic.NamingConventions.UpperCaseConstantName.ConstantNotUpperCase
define( 'object', 'OBJECT' ); // Back compat.
/**
* @since 2.5.0
*/
define( 'OBJECT_K', 'OBJECT_K' );
/**
* @since 0.71
*/
define( 'ARRAY_A', 'ARRAY_A' );
/**
* @since 0.71
*/
define( 'ARRAY_N', 'ARRAY_N' );
/**
* WordPress database access abstraction class.
*
* This class is used to interact with a database without needing to use raw SQL statements.
* By default, WordPress uses this class to instantiate the global $wpdb object, providing
* access to the WordPress database.
*
* It is possible to replace this class with your own by setting the $wpdb global variable
* in wp-content/db.php file to your class. The wpdb class will still be included, so you can
* extend it or simply use your own.
*
* @link https://developer.wordpress.org/reference/classes/wpdb/
*
* @since 0.71
*/
#[AllowDynamicProperties]
class wpdb {
/**
* Whether to show SQL/DB errors.
*
* Default is to show errors if both WP_DEBUG and WP_DEBUG_DISPLAY evaluate to true.
*
* @since 0.71
*
* @var bool
*/
public $show_errors = false;
/**
* Whether to suppress errors during the DB bootstrapping. Default false.
*
* @since 2.5.0
*
* @var bool
*/
public $suppress_errors = false;
/**
* The error encountered during the last query.
*
* @since 2.5.0
*
* @var string
*/
public $last_error = '';
/**
* The number of queries made.
*
* @since 1.2.0
*
* @var int
*/
public $num_queries = 0;
/**
* Count of rows returned by the last query.
*
* @since 0.71
*
* @var int
*/
public $num_rows = 0;
/**
* Count of rows affected by the last query.
*
* @since 0.71
*
* @var int
*/
public $rows_affected = 0;
/**
* The ID generated for an AUTO_INCREMENT column by the last query (usually INSERT).
*
* @since 0.71
*
* @var int
*/
public $insert_id = 0;
/**
* The last query made.
*
* @since 0.71
*
* @var string
*/
public $last_query;
/**
* Results of the last query.
*
* @since 0.71
*
* @var stdClass[]|null
*/
public $last_result;
/**
* Database query result.
*
* Possible values:
*
* - `mysqli_result` instance for successful SELECT, SHOW, DESCRIBE, or EXPLAIN queries
* - `true` for other query types that were successful
* - `null` if a query is yet to be made or if the result has since been flushed
* - `false` if the query returned an error
*
* @since 0.71
*
* @var mysqli_result|bool|null
*/
protected $result;
/**
* Cached column info, for confidence checking data before inserting.
*
* @since 4.2.0
*
* @var array
*/
protected $col_meta = array();
/**
* Calculated character sets keyed by table name.
*
* @since 4.2.0
*
* @var string[]
*/
protected $table_charset = array();
/**
* Whether text fields in the current query need to be confidence checked.
*
* @since 4.2.0
*
* @var bool
*/
protected $check_current_query = true;
/**
* Flag to ensure we don't run into recursion problems when checking the collation.
*
* @since 4.2.0
*
* @see wpdb::check_safe_collation()
* @var bool
*/
private $checking_collation = false;
/**
* Saved info on the table column.
*
* @since 0.71
*
* @var array
*/
protected $col_info;
/**
* Log of queries that were executed, for debugging purposes.
*
* @since 1.5.0
* @since 2.5.0 The third element in each query log was added to record the calling functions.
* @since 5.1.0 The fourth element in each query log was added to record the start time.
* @since 5.3.0 The fifth element in each query log was added to record custom data.
*
* @var array[] {
* Array of arrays containing information about queries that were executed.
*
* @type array ...$0 {
* Data for each query.
*
* @type string $0 The query's SQL.
* @type float $1 Total time spent on the query, in seconds.
* @type string $2 Comma-separated list of the calling functions.
* @type float $3 Unix timestamp of the time at the start of the query.
* @type array $4 Custom query data.
* }
* }
*/
public $queries;
/**
* The number of times to retry reconnecting before dying. Default 5.
*
* @since 3.9.0
*
* @see wpdb::check_connection()
* @var int
*/
protected $reconnect_retries = 5;
/**
* 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 2.5.0
*
* @var string
*/
public $prefix = '';
/**
* WordPress base table prefix.
*
* @since 3.0.0
*
* @var string
*/
public $base_prefix;
/**
* Whether the database queries are ready to start executing.
*
* @since 2.3.2
*
* @var bool
*/
public $ready = false;
/**
* Blog ID.
*
* @since 3.0.0
*
* @var int
*/
public $blogid = 0;
/**
* Site ID.
*
* @since 3.0.0
*
* @var int
*/
public $siteid = 0;
/**
* List of WordPress per-site tables.
*
* @since 2.5.0
*
* @see wpdb::tables()
* @var string[]
*/
public $tables = array(
'posts',
'comments',
'links',
'options',
'postmeta',
'terms',
'term_taxonomy',
'term_relationships',
'termmeta',
'commentmeta',
);
/**
* List of deprecated WordPress tables.
*
* 'categories', 'post2cat', and 'link2cat' were deprecated in 2.3.0, db version 5539.
*
* @since 2.9.0
*
* @see wpdb::tables()
* @var string[]
*/
public $old_tables = array( 'categories', 'post2cat', 'link2cat' );
/**
* List of WordPress global tables.
*
* @since 3.0.0
*
* @see wpdb::tables()
* @var string[]
*/
public $global_tables = array( 'users', 'usermeta' );
/**
* List of Multisite global tables.
*
* @since 3.0.0
*
* @see wpdb::tables()
* @var string[]
*/
public $ms_global_tables = array(
'blogs',
'blogmeta',
'signups',
'site',
'sitemeta',
'registration_log',
);
/**
* List of deprecated WordPress Multisite global tables.
*
* @since 6.1.0
*
* @see wpdb::tables()
* @var string[]
*/
public $old_ms_global_tables = array( 'sitecategories' );
/**
* WordPress Comments table.
*
* @since 1.5.0
*
* @var string
*/
public $comments;
/**
* WordPress Comment Metadata table.
*
* @since 2.9.0
*
* @var string
*/
public $commentmeta;
/**
* WordPress Links table.
*
* @since 1.5.0
*
* @var string
*/
public $links;
/**
* WordPress Options table.
*
* @since 1.5.0
*
* @var string
*/
public $options;
/**
* WordPress Post Metadata table.
*
* @since 1.5.0
*
* @var string
*/
public $postmeta;
/**
* WordPress Posts table.
*
* @since 1.5.0
*
* @var string
*/
public $posts;
/**
* WordPress Terms table.
*
* @since 2.3.0
*
* @var string
*/
public $terms;
/**
* WordPress Term Relationships table.
*
* @since 2.3.0
*
* @var string
*/
public $term_relationships;
/**
* WordPress Term Taxonomy table.
*
* @since 2.3.0
*
* @var string
*/
public $term_taxonomy;
/**
* WordPress Term Meta table.
*
* @since 4.4.0
*
* @var string
*/
public $termmeta;
//
// Global and Multisite tables
//
/**
* WordPress User Metadata table.
*
* @since 2.3.0
*
* @var string
*/
public $usermeta;
/**
* WordPress Users table.
*
* @since 1.5.0
*
* @var string
*/
public $users;
/**
* Multisite Blogs table.
*
* @since 3.0.0
*
* @var string
*/
public $blogs;
/**
* Multisite Blog Metadata table.
*
* @since 5.1.0
*
* @var string
*/
public $blogmeta;
/**
* Multisite Registration Log table.
*
* @since 3.0.0
*
* @var string
*/
public $registration_log;
/**
* Multisite Signups table.
*
* @since 3.0.0
*
* @var string
*/
public $signups;
/**
* Multisite Sites table.
*
* @since 3.0.0
*
* @var string
*/
public $site;
/**
* Multisite Sitewide Terms table.
*
* @since 3.0.0
*
* @var string
*/
public $sitecategories;
/**
* Multisite Site Metadata table.
*
* @since 3.0.0
*
* @var string
*/
public $sitemeta;
/**
* Format specifiers for DB columns.
*
* Columns not listed here default to %s. Initialized during WP load.
* Keys are column names, values are format types: 'ID' => '%d'.
*
* @since 2.8.0
*
* @see wpdb::prepare()
* @see wpdb::insert()
* @see wpdb::update()
* @see wpdb::delete()
* @see wp_set_wpdb_vars()
* @var array
*/
public $field_types = array();
/**
* Database table columns charset.
*
* @since 2.2.0
*
* @var string
*/
public $charset;
/**
* Database table columns collate.
*
* @since 2.2.0
*
* @var string
*/
public $collate;
/**
* Database Username.
*
* @since 2.9.0
*
* @var string
*/
protected $dbuser;
/**
* Database Password.
*
* @since 3.1.0
*
* @var string
*/
protected $dbpassword;
/**
* Database Name.
*
* @since 3.1.0
*
* @var string
*/
protected $dbname;
/**
* Database Host.
*
* @since 3.1.0
*
* @var string
*/
protected $dbhost;
/**
* Database handle.
*
* Possible values:
*
* - `mysqli` instance during normal operation
* - `null` if the connection is yet to be made or has been closed
* - `false` if the connection has failed
*
* @since 0.71
*
* @var mysqli|false|null
*/
protected $dbh;
/**
* A textual description of the last query/get_row/get_var call.
*
* @since 3.0.0
*
* @var string
*/
public $func_call;
/**
* Whether MySQL is used as the database engine.
*
* Set in wpdb::db_connect() to true, by default. This is used when checking
* against the required MySQL version for WordPress. Normally, a replacement
* database drop-in (db.php) will skip these checks, but setting this to true
* will force the checks to occur.
*
* @since 3.3.0
*
* @var bool
*/
public $is_mysql = null;
/**
* A list of incompatible SQL modes.
*
* @since 3.9.0
*
* @var string[]
*/
protected $incompatible_modes = array(
'NO_ZERO_DATE',
'ONLY_FULL_GROUP_BY',
'STRICT_TRANS_TABLES',
'STRICT_ALL_TABLES',
'TRADITIONAL',
'ANSI',
);
/**
* Backward compatibility, where wpdb::prepare() has not quoted formatted/argnum placeholders.
*
* This is often used for table/field names (before %i was supported), and sometimes string formatting, e.g.
*
* $wpdb->prepare( 'WHERE `%1$s` = "%2$s something %3$s" OR %1$s = "%4$-10s"', 'field_1', 'a', 'b', 'c' );
*
* But it's risky, e.g. forgetting to add quotes, resulting in SQL Injection vulnerabilities:
*
* $wpdb->prepare( 'WHERE (id = %1s) OR (id = %2$s)', $_GET['id'], $_GET['id'] ); // ?id=id
*
* This feature is preserved while plugin authors update their code to use safer approaches:
*
* $_GET['key'] = 'a`b';
*
* $wpdb->prepare( 'WHERE %1s = %s', $_GET['key'], $_GET['value'] ); // WHERE a`b = 'value'
* $wpdb->prepare( 'WHERE `%1$s` = "%2$s"', $_GET['key'], $_GET['value'] ); // WHERE `a`b` = "value"
*
* $wpdb->prepare( 'WHERE %i = %s', $_GET['key'], $_GET['value'] ); // WHERE `a``b` = 'value'
*
* While changing to false will be fine for queries not using formatted/argnum placeholders,
* any remaining cases are most likely going to result in SQL errors (good, in a way):
*
* $wpdb->prepare( 'WHERE %1$s = "%2$-10s"', 'my_field', 'my_value' );
* true = WHERE my_field = "my_value "
* false = WHERE 'my_field' = "'my_value '"
*
* But there may be some queries that result in an SQL Injection vulnerability:
*
* $wpdb->prepare( 'WHERE id = %1$s', $_GET['id'] ); // ?id=id
*
* So there may need to be a `_doing_it_wrong()` phase, after we know everyone can use
* identifier placeholders (%i), but before this feature is disabled or removed.
*
* @since 6.2.0
* @var bool
*/
private $allow_unsafe_unquoted_parameters = true;
/**
* Whether to use the mysqli extension over mysql. This is no longer used as the mysql
* extension is no longer supported.
*
* Default true.
*
* @since 3.9.0
* @since 6.4.0 This property was removed.
* @since 6.4.1 This property was reinstated and its default value was changed to true.
* The property is no longer used in core but may be accessed externally.
*
* @var bool
*/
private $use_mysqli = true;
/**
* Whether we've managed to successfully connect at some point.
*
* @since 3.9.0
*
* @var bool
*/
private $has_connected = false;
/**
* Time when the last query was performed.
*
* Only set when `SAVEQUERIES` is defined and truthy.
*
* @since 1.5.0
*
* @var float
*/
public $time_start = null;
/**
* The last SQL error that was encountered.
*
* @since 2.5.0
*
* @var WP_Error|string
*/
public $error = null;
/**
* Connects to the database server and selects a database.
*
* Does the actual setting up
* of the class properties and connection to the database.
*
* @since 2.0.8
*
* @link https://core.trac.wordpress.org/ticket/3354
*
* @param string $dbuser Database user.
* @param string $dbpassword Database password.
* @param string $dbname Database name.
* @param string $dbhost Database host.
*/
public function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) {
if ( WP_DEBUG && WP_DEBUG_DISPLAY ) {
$this->show_errors();
}
$this->dbuser = $dbuser;
$this->dbpassword = $dbpassword;
$this->dbname = $dbname;
$this->dbhost = $dbhost;
// wp-config.php creation will manually connect when ready.
if ( defined( 'WP_SETUP_CONFIG' ) ) {
return;
}
$this->db_connect();
}
/**
* Makes private properties readable for backward compatibility.
*
* @since 3.5.0
*
* @param string $name The private member to get, and optionally process.
* @return mixed The private member.
*/
public function __get( $name ) {
if ( 'col_info' === $name ) {
$this->load_col_info();
}
return $this->$name;
}
/**
* Makes private properties settable for backward compatibility.
*
* @since 3.5.0
*
* @param string $name The private member to set.
* @param mixed $value The value to set.
*/
public function __set( $name, $value ) {
$protected_members = array(
'col_meta',
'table_charset',
'check_current_query',
'allow_unsafe_unquoted_parameters',
);
if ( in_array( $name, $protected_members, true ) ) {
return;
}
$this->$name = $value;
}
/**
* Makes private properties check-able for backward compatibility.
*
* @since 3.5.0
*
* @param string $name The private member to check.
* @return bool If the member is set or not.
*/
public function __isset( $name ) {
return isset( $this->$name );
}
/**
* Makes private properties un-settable for backward compatibility.
*
* @since 3.5.0
*
* @param string $name The private member to unset
*/
public function __unset( $name ) {
unset( $this->$name );
}
/**
* Sets $this->charset and $this->collate.
*
* @since 3.1.0
*/
public function init_charset() {
$charset = '';
$collate = '';
if ( function_exists( 'is_multisite' ) && is_multisite() ) {
$charset = 'utf8';
if ( defined( 'DB_COLLATE' ) && DB_COLLATE ) {
$collate = DB_COLLATE;
} else {
$collate = 'utf8_general_ci';
}
} elseif ( defined( 'DB_COLLATE' ) ) {
$collate = DB_COLLATE;
}
if ( defined( 'DB_CHARSET' ) ) {
$charset = DB_CHARSET;
}
$charset_collate = $this->determine_charset( $charset, $collate );
$this->charset = $charset_collate['charset'];
$this->collate = $charset_collate['collate'];
}
/**
* Determines the best charset and collation to use given a charset and collation.
*
* For example, when able, utf8mb4 should be used instead of utf8.
*
* @since 4.6.0
*
* @param string $charset The character set to check.
* @param string $collate The collation to check.
* @return array {
* The most appropriate character set and collation to use.
*
* @type string $charset Character set.
* @type string $collate Collation.
* }
*/
public function determine_charset( $charset, $collate ) {
if ( ( ! ( $this->dbh instanceof mysqli ) ) || empty( $this->dbh ) ) {
return compact( 'charset', 'collate' );
}
if ( 'utf8' === $charset && $this->has_cap( 'utf8mb4' ) ) {
$charset = 'utf8mb4';
}
if ( 'utf8mb4' === $charset && ! $this->has_cap( 'utf8mb4' ) ) {
$charset = 'utf8';
$collate = str_replace( 'utf8mb4_', 'utf8_', $collate );
}
if ( 'utf8mb4' === $charset ) {
// _general_ is outdated, so we can upgrade it to _unicode_, instead.
if ( ! $collate || 'utf8_general_ci' === $collate ) {
$collate = 'utf8mb4_unicode_ci';
} else {
$collate = str_replace( 'utf8_', 'utf8mb4_', $collate );
}
}
// _unicode_520_ is a better collation, we should use that when it's available.
if ( $this->has_cap( 'utf8mb4_520' ) && 'utf8mb4_unicode_ci' === $collate ) {
$collate = 'utf8mb4_unicode_520_ci';
}
return compact( 'charset', 'collate' );
}
/**
* Sets the connection's character set.
*
* @since 3.1.0
*
* @param mysqli $dbh The connection returned by `mysqli_connect()`.
* @param string $charset Optional. The character set. Default null.
* @param string $collate Optional. The collation. Default null.
*/
public function set_charset( $dbh, $charset = null, $collate = null ) {
if ( ! isset( $charset ) ) {
$charset = $this->charset;
}
if ( ! isset( $collate ) ) {
$collate = $this->collate;
}
if ( $this->has_cap( 'collation' ) && ! empty( $charset ) ) {
$set_charset_succeeded = true;
if ( function_exists( 'mysqli_set_charset' ) && $this->has_cap( 'set_charset' ) ) {
$set_charset_succeeded = mysqli_set_charset( $dbh, $charset );
}
if ( $set_charset_succeeded ) {
$query = $this->prepare( 'SET NAMES %s', $charset );
if ( ! empty( $collate ) ) {
$query .= $this->prepare( ' COLLATE %s', $collate );
}
mysqli_query( $dbh, $query );
}
}
}
/**
* Changes the current SQL mode, and ensures its WordPress compatibility.
*
* If no modes are passed, it will ensure the current MySQL server modes are compatible.
*
* @since 3.9.0
*
* @param array $modes Optional. A list of SQL modes to set. Default empty array.
*/
public function set_sql_mode( $modes = array() ) {
if ( empty( $modes ) ) {
$res = mysqli_query( $this->dbh, 'SELECT @@SESSION.sql_mode' );
if ( empty( $res ) ) {
return;
}
$modes_array = mysqli_fetch_array( $res );
if ( empty( $modes_array[0] ) ) {
return;
}
$modes_str = $modes_array[0];
if ( empty( $modes_str ) ) {
return;
}
$modes = explode( ',', $modes_str );
}
$modes = array_change_key_case( $modes, CASE_UPPER );
/**
* Filters the list of incompatible SQL modes to exclude.
*
* @since 3.9.0
*
* @param array $incompatible_modes An array of incompatible modes.
*/
$incompatible_modes = (array) apply_filters( 'incompatible_sql_modes', $this->incompatible_modes );
foreach ( $modes as $i => $mode ) {
if ( in_array( $mode, $incompatible_modes, true ) ) {
unset( $modes[ $i ] );
}
}
$modes_str = implode( ',', $modes );
mysqli_query( $this->dbh, "SET SESSION sql_mode='$modes_str'" );
}
/**
* Sets the table prefix for the WordPress tables.
*
* @since 2.5.0
*
* @param string $prefix Alphanumeric name for the new prefix.
* @param bool $set_table_names Optional. Whether the table names, e.g. wpdb::$posts,
* should be updated or not. Default true.
* @return string|WP_Error Old prefix or WP_Error on error.
*/
public function set_prefix( $prefix, $set_table_names = true ) {
if ( preg_match( '|[^a-z0-9_]|i', $prefix ) ) {
return new WP_Error( 'invalid_db_prefix', 'Invalid database prefix' );
}
$old_prefix = is_multisite() ? '' : $prefix;
if ( isset( $this->base_prefix ) ) {
$old_prefix = $this->base_prefix;
}
$this->base_prefix = $prefix;
if ( $set_table_names ) {
foreach ( $this->tables( 'global' ) as $table => $prefixed_table ) {
$this->$table = $prefixed_table;
}
if ( is_multisite() && empty( $this->blogid ) ) {
return $old_prefix;
}
$this->prefix = $this->get_blog_prefix();
foreach ( $this->tables( 'blog' ) as $table => $prefixed_table ) {
$this->$table = $prefixed_table;
}
foreach ( $this->tables( 'old' ) as $table => $prefixed_table ) {
$this->$table = $prefixed_table;
}
}
return $old_prefix;
}
/**
* Sets blog ID.
*
* @since 3.0.0
*
* @param int $blog_id
* @param int $network_id Optional. Network ID. Default 0.
* @return int Previous blog ID.
*/
public function set_blog_id( $blog_id, $network_id = 0 ) {
if ( ! empty( $network_id ) ) {
$this->siteid = $network_id;
}
$old_blog_id = $this->blogid;
$this->blogid = $blog_id;
$this->prefix = $this->get_blog_prefix();
foreach ( $this->tables( 'blog' ) as $table => $prefixed_table ) {
$this->$table = $prefixed_table;
}
foreach ( $this->tables( 'old' ) as $table => $prefixed_table ) {
$this->$table = $prefixed_table;
}
return $old_blog_id;
}
/**
* Gets blog prefix.
*
* @since 3.0.0
*
* @param int $blog_id Optional. Blog ID to retrieve the table prefix for.
* Defaults to the current blog ID.
* @return string Blog prefix.
*/
public function get_blog_prefix( $blog_id = null ) {
if ( is_multisite() ) {
if ( null === $blog_id ) {
$blog_id = $this->blogid;
}
$blog_id = (int) $blog_id;
if ( defined( 'MULTISITE' ) && ( 0 === $blog_id || 1 === $blog_id ) ) {
return $this->base_prefix;
} else {
return $this->base_prefix . $blog_id . '_';
}
} else {
return $this->base_prefix;
}
}
/**
* Returns an array of WordPress tables.
*
* Also allows for the `CUSTOM_USER_TABLE` and `CUSTOM_USER_META_TABLE` to override the WordPress users
* and usermeta tables that would otherwise be determined by the prefix.
*
* The `$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 on multisite.
* - 'ms_global' - returns the multisite global tables, regardless if current installation is multisite.
* - 'old' - returns tables which are deprecated.
*
* @since 3.0.0
* @since 6.1.0 `old` now includes deprecated multisite global tables only on multisite.
*
* @uses wpdb::$tables
* @uses wpdb::$old_tables
* @uses wpdb::$global_tables
* @uses wpdb::$ms_global_tables
* @uses wpdb::$old_ms_global_tables
*
* @param string $scope Optional. Possible values include 'all', 'global', 'ms_global', 'blog',
* or 'old' tables. Default 'all'.
* @param bool $prefix Optional. Whether to include table prefixes. If blog prefix is requested,
* then the custom users and usermeta tables will be mapped. Default true.
* @param int $blog_id Optional. The blog_id to prefix. Used only when prefix is requested.
* Defaults to `wpdb::$blogid`.
* @return string[] Table names. When a prefix is requested, the key is the unprefixed table name.
*/
public function tables( $scope = 'all', $prefix = true, $blog_id = 0 ) {
switch ( $scope ) {
case 'all':
$tables = array_merge( $this->global_tables, $this->tables );
if ( is_multisite() ) {
$tables = array_merge( $tables, $this->ms_global_tables );
}
break;
case 'blog':
$tables = $this->tables;
break;
case 'global':
$tables = $this->global_tables;
if ( is_multisite() ) {
$tables = array_merge( $tables, $this->ms_global_tables );
}
break;
case 'ms_global':
$tables = $this->ms_global_tables;
break;
case 'old':
$tables = $this->old_tables;
if ( is_multisite() ) {
$tables = array_merge( $tables, $this->old_ms_global_tables );
}
break;
default:
return array();
}
if ( $prefix ) {
if ( ! $blog_id ) {
$blog_id = $this->blogid;
}
$blog_prefix = $this->get_blog_prefix( $blog_id );
$base_prefix = $this->base_prefix;
$global_tables = array_merge( $this->global_tables, $this->ms_global_tables );
foreach ( $tables as $k => $table ) {
if ( in_array( $table, $global_tables, true ) ) {
$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 or provided database connection.
*
* The database name will be changed based on the current database connection.
* On failure, the execution will bail and display a DB error.
*
* @since 0.71
*
* @param string $db Database name.
* @param mysqli $dbh Optional. Database connection.
* Defaults to the current database handle.
*/
public function select( $db, $dbh = null ) {
if ( is_null( $dbh ) ) {
$dbh = $this->dbh;
}
$success = mysqli_select_db( $dbh, $db );
if ( ! $success ) {
$this->ready = false;
if ( ! did_action( 'template_redirect' ) ) {
wp_load_translations_early();
$message = '<h1>' . __( 'Cannot select database' ) . "</h1>\n";
$message .= '<p>' . sprintf(
/* translators: %s: Database name. */
__( 'The database server could be connected to (which means your username and password is okay) but the %s database could not be selected.' ),
'<code>' . htmlspecialchars( $db, ENT_QUOTES ) . '</code>'
) . "</p>\n";
$message .= "<ul>\n";
$message .= '<li>' . __( 'Are you sure it exists?' ) . "</li>\n";
$message .= '<li>' . sprintf(
/* translators: 1: Database user, 2: Database name. */
__( 'Does the user %1$s have permission to use the %2$s database?' ),
'<code>' . htmlspecialchars( $this->dbuser, ENT_QUOTES ) . '</code>',
'<code>' . htmlspecialchars( $db, ENT_QUOTES ) . '</code>'
) . "</li>\n";
$message .= '<li>' . sprintf(
/* translators: %s: Database name. */
__( 'On some systems the name of your database is prefixed with your username, so it would be like <code>username_%1$s</code>. Could that be the problem?' ),
htmlspecialchars( $db, ENT_QUOTES )
) . "</li>\n";
$message .= "</ul>\n";
$message .= '<p>' . sprintf(
/* translators: %s: Support forums URL. */
__( 'If you do not 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="%s">WordPress support forums</a>.' ),
__( 'https://wordpress.org/support/forums/' )
) . "</p>\n";
$this->bail( $message, 'db_select_fail' );
}
}
}
/**
* Do not use, deprecated.
*
* Use esc_sql() or wpdb::prepare() instead.
*
* @since 2.8.0
* @deprecated 3.6.0 Use wpdb::prepare()
* @see wpdb::prepare()
* @see esc_sql()
*
* @param string $data
* @return string
*/
public function _weak_escape( $data ) {
if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) ) {
_deprecated_function( __METHOD__, '3.6.0', 'wpdb::prepare() or esc_sql()' );
}
return addslashes( $data );
}
/**
* Real escape using mysqli_real_escape_string().
*
* @since 2.8.0
*
* @see mysqli_real_escape_string()
*
* @param string $data String to escape.
* @return string Escaped string.
*/
public function _real_escape( $data ) {
if ( ! is_scalar( $data ) ) {
return '';
}
if ( $this->dbh ) {
$escaped = mysqli_real_escape_string( $this->dbh, $data );
} else {
$class = get_class( $