/wp-includes/wp-db.php
PHP | 3665 lines | 1815 code | 400 blank | 1450 comment | 371 complexity | a787f58312b2b6a79c6b2b4ab0754577 MD5 | raw file
Possible License(s): 0BSD
- <?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
- */
- 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
- */
- var $show_errors = false;
- /**
- * Whether to suppress errors during the DB bootstrapping. Default false.
- *
- * @since 2.5.0
- * @var bool
- */
- var $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
- */
- var $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
- */
- var $last_query;
- /**
- * Results of the last query.
- *
- * @since 0.71
- * @var array|null
- */
- var $last_result;
- /**
- * MySQL result, which is either a resource or boolean.
- *
- * @since 0.71
- * @var mixed
- */
- protected $result;
- /**
- * Cached column info, for sanity checking data before inserting.
- *
- * @since 4.2.0
- * @var array
- */
- protected $col_meta = array();
- /**
- * Calculated character sets on tables.
- *
- * @since 4.2.0
- * @var array
- */
- protected $table_charset = array();
- /**
- * Whether text fields in the current query need to be sanity checked. Default false.
- *
- * @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 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.
- * }
- * }
- */
- var $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
- */
- var $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-blog tables.
- *
- * @since 2.5.0
- * @see wpdb::tables()
- * @var array
- */
- var $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 array
- */
- var $old_tables = array( 'categories', 'post2cat', 'link2cat' );
- /**
- * List of WordPress global tables.
- *
- * @since 3.0.0
- * @see wpdb::tables()
- * @var array
- */
- var $global_tables = array( 'users', 'usermeta' );
- /**
- * List of Multisite global tables.
- *
- * @since 3.0.0
- * @see wpdb::tables()
- * @var array
- */
- var $ms_global_tables = array(
- 'blogs',
- 'blogmeta',
- 'signups',
- 'site',
- 'sitemeta',
- 'sitecategories',
- 'registration_log',
- );
- /**
- * 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.
- *
- * @since 0.71
- * @var string
- */
- 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 array
- */
- protected $incompatible_modes = array(
- 'NO_ZERO_DATE',
- 'ONLY_FULL_GROUP_BY',
- 'STRICT_TRANS_TABLES',
- 'STRICT_ALL_TABLES',
- 'TRADITIONAL',
- 'ANSI',
- );
- /**
- * Whether to use mysqli over mysql. Default false.
- *
- * @since 3.9.0
- * @var bool
- */
- private $use_mysqli = false;
- /**
- * Whether we've managed to successfully connect at some point.
- *
- * @since 3.9.0
- * @var bool
- */
- private $has_connected = false;
- /**
- * Connects to the database server and selects a database.
- *
- * PHP5 style constructor for compatibility with PHP5. Does the actual setting up
- * of the class properties and connection to the database.
- *
- * @since 2.0.8
- *
- * @link https://core.trac.wordpress.org/ticket/3354
- * @global string $wp_version The WordPress version string.
- *
- * @param string $dbuser MySQL database user.
- * @param string $dbpassword MySQL database password.
- * @param string $dbname MySQL database name.
- * @param string $dbhost MySQL database host.
- */
- public function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) {
- if ( WP_DEBUG && WP_DEBUG_DISPLAY ) {
- $this->show_errors();
- }
- // Use ext/mysqli if it exists unless WP_USE_EXT_MYSQL is defined as true.
- if ( function_exists( 'mysqli_connect' ) ) {
- $this->use_mysqli = true;
- if ( defined( 'WP_USE_EXT_MYSQL' ) ) {
- $this->use_mysqli = ! WP_USE_EXT_MYSQL;
- }
- }
- $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',
- );
- 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->use_mysqli && ! ( $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 resource $dbh The resource given by mysql_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 ( $this->use_mysqli ) {
- 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 );
- }
- } else {
- if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset' ) ) {
- $set_charset_succeeded = mysql_set_charset( $charset, $dbh );
- }
- if ( $set_charset_succeeded ) {
- $query = $this->prepare( 'SET NAMES %s', $charset );
- if ( ! empty( $collate ) ) {
- $query .= $this->prepare( ' COLLATE %s', $collate );
- }
- mysql_query( $query, $dbh );
- }
- }
- }
- }
- /**
- * 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 ) ) {
- if ( $this->use_mysqli ) {
- $res = mysqli_query( $this->dbh, 'SELECT @@SESSION.sql_mode' );
- } else {
- $res = mysql_query( 'SELECT @@SESSION.sql_mode', $this->dbh );
- }
- if ( empty( $res ) ) {
- return;
- }
- if ( $this->use_mysqli ) {
- $modes_array = mysqli_fetch_array( $res );
- if ( empty( $modes_array[0] ) ) {
- return;
- }
- $modes_str = $modes_array[0];
- } else {
- $modes_str = mysql_result( $res, 0 );
- }
- if ( empty( $modes_str ) ) {
- return;
- }
- $modes = explode( ',', $modes_str );
- }
- $modes = array_change_key_case( $modes, CASE_UPPER );
- /**
- * 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 );
- if ( $this->use_mysqli ) {
- mysqli_query( $this->dbh, "SET SESSION sql_mode='$modes_str'" );
- } else {
- mysql_query( "SET SESSION sql_mode='$modes_str'", $this->dbh );
- }
- }
- /**
- * 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.
- * @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.
- * @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 $scope argument can take one of the following:
- *
- * 'all' - returns 'all' and 'global' tables. No old tables are returned.
- * 'blog' - returns the blog-level tables for the queried blog.
- * 'global' - returns the global tables for the installation, returning multisite tables only on multisite.
- * 'ms_global' - returns the multisite global tables, regardless if current installation is multisite.
- * 'old' - returns tables which are deprecated.
- *
- * @since 3.0.0
- *
- * @uses wpdb::$tables
- * @uses wpdb::$old_tables
- * @uses wpdb::$global_tables
- * @uses wpdb::$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 array 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;
- 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 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 MySQL database name.
- * @param resource|null $dbh Optional link identifier.
- */
- public function select( $db, $dbh = null ) {
- if ( is_null( $dbh ) ) {
- $dbh = $this->dbh;
- }
- if ( $this->use_mysqli ) {
- $success = mysqli_select_db( $dbh, $db );
- } else {
- $success = mysql_select_db( $db, $dbh );
- }
- if ( ! $success ) {
- $this->ready = false;
- if ( ! did_action( 'template_redirect' ) ) {
- wp_load_translations_early();
- $message = '<h1>' . __( 'Can’t select database' ) . "</h1>\n";
- $message .= '<p>' . sprintf(
- /* translators: %s: Database name. */
- __( 'We were able to connect to the database server (which means your username and password is okay) but not able to select the %s database.' ),
- '<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 don’t know how to set up a database you should <strong>contact your host</strong>. If all else fails you may find help at the <a href="%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 $string
- * @return string
- */
- function _weak_escape( $string ) {
- if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) ) {
- _deprecated_function( __METHOD__, '3.6.0', 'wpdb::prepare() or esc_sql()' );
- }
- return addslashes( $string );
- }
- /**
- * Real escape, using mysqli_real_escape_string() or mysql_real_escape_string().
- *
- * @since 2.8.0
- *
- * @see mysqli_real_escape_string()
- * @see mysql_real_escape_string()
- *
- * @param string $string String to escape.
- * @return string Escaped string.
- */
- function _real_escape( $string ) {
- if ( $this->dbh ) {
- if ( $this->use_mysqli ) {
- $escaped = mysqli_real_escape_string( $this->dbh, $string );
- } else {
- $escaped = mysql_real_escape_string( $string, $this->dbh );
- }
- } else {
- $class = get_class( $this );
- if ( function_exists( '__' ) ) {
- /* translators: %s: Database access abstraction class, usually wpdb or a class extending wpdb. */
- _doing_it_wrong( $class, sprintf( __( '%s must set a database connection for use with escaping.' ), $class ), '3.6.0' );
- } else {
- _doing_it_wrong( $class, sprintf( '%s must set a database connection for use with escaping.', $class ), '3.6.0' );
- }
- $escaped = addslashes( $string );
- }
- return $this->add_placeholder_escape( $escaped );
- }
- /**
- * Escapes data. Works on arrays.
- *
- * @since 2.8.0
- *
- * @uses wpdb::_real_escape()
- *
- * @param string|array $data Data to escape.
- * @return string|array Escaped data, in the same type as supplied.
- */
- public function _escape( $data ) {
- if ( is_array( $data ) ) {
- foreach ( $data as $k => $v ) {
- if ( is_array( $v ) ) {
- $data[ $k ] = $this->_escape( $v );
- } else {
- $data[ $k ] = $this->_real_escape( $v );
- }
- }
- } else {
- $data = $this->_real_escape( $data );
- }
- return $data;
- }
- /**
- * Do not use, deprecated.
- *
- * Use esc_sql() or wpdb::prepare() instead.
- *
- * @since 0.71
- * @deprecated 3.6.0 Use wpdb::prepare()
- * @see wpdb::prepare()
- * @see esc_sql()
- *
- * @param string|array $data Data to escape.
- * @return string|array Escaped data, in the same type as supplied.
- */
- public function escape( $data ) {
- if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) ) {
- _deprecated_function( __METHOD__, '3.6.0', 'wpdb::prepare() or esc_sql()' );
- }
- if ( is_array( $data ) ) {
- foreach ( $data as $k => $v ) {
- if ( is_array( $v ) ) {
- $data[ $k ] = $this->escape( $v, 'recursive' );
- } else {
- $data[ $k ] = $this->_weak_escape( $v, 'internal' );
- }
- }
- } else {
- $data = $this->_weak_escape( $data, 'internal' );
- }
- return $data;
- }
- /**
- * Escapes content by reference for insertion into the database, for security.
- *
- * @uses wpdb::_real_escape()
- *
- * @since 2.3.0
- *
- * @param string $string String to escape.
- */
- public function escape_by_ref( &$string ) {
- if ( ! is_float( $string ) ) {
- $string = $this->_real_escape( $string );
- }
- }
- /**
- * Prepares a SQL query for safe execution.
- *
- * Uses sprintf()-like syntax. The following placeholders can be used in the query string:
- * %d (integer)
- * %f (float)
- * %s (string)
- *
- * All placeholders MUST be left unquoted in the query string. A corresponding argument
- * MUST be passed for each placeholder.
- *
- * Note: There is one exception to the above: for compatibility with old behavior,
- * numbered or formatted string placeholders (eg, %1$s, %5s) will not have quotes
- * added by this function, so should be passed with appropriate quotes around them.
- *
- * Literal percentage signs (%) in the query string must be written as %%. Percentage wildcards
- * (for example, to use in LIKE syntax) must be passed via a substitution argument containing
- * the complete LIKE string, these cannot be inserted directly in the query string.
- * Also see wpdb::esc_like().
- *
- * Arguments may be passed as individual arguments to the method, or as a single array
- * containing all arguments. A combination of the two is not supported.
- *
- * Examples:
- * $wpdb->prepare( "SELECT * FROM `table` WHERE `column` = %s AND `field` = %d OR `other_field` LIKE %s", array( 'foo', 1337, '%bar' ) );
- * $wpdb->prepare( "SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo' );
- *
- * @since 2.3.0
- * @since 5.3.0 Formalized the existing and already documented `...$args` parameter
- * by updating the function signature. The second parameter was changed
- * from `$args` to `...$args`.
- *
- * @link https://www.php.net/sprintf Description of syntax.
- *
- * @param string $query Query statement with sprintf()-like placeholders.
- * @param array|mixed $args The array of variables to substitute into the query's placeholders
- * if being called with an array of arguments, or the first variable
- * to substitute into the query's placeholders if being called with
- * individual arguments.
- * @param mixed ...$args Further variables to substitute into the query's placeholders
- * if being called with individual arguments.
- * @return string|void Sanitized query string, if there is a query to prepare.
- */
- public function prepare( $query, ...$args ) {
- if ( is_null( $query ) ) {
- return;
- }
- // This is not meant to be foolproof -- but it will catch obviously incorrect usage.
- if ( strpos( $query, '%' ) === false ) {
- wp_load_translations_early();
- _doing_it_wrong(
- 'wpdb::prepare',
- sprintf(
- /* translators: %s: wpdb::prepare() */
- __( 'The query argument of %s must have a placeholder.' ),
- 'wpdb::prepare()'
- ),
- '3.9.0'
- );
- }
- // If args were passed as an array (as in vsprintf), move them up.
- $passed_as_array = false;
- if ( is_array( $args[0] ) && count( $args ) == 1 ) {
- $passed_as_array = true;
- $args = $args[0];
- }
- foreach ( $args as $arg ) {
- if ( ! is_scalar( $arg ) && ! is_null( $arg ) ) {
- wp_load_translations_early();
- _doing_it_wrong(
- 'wpdb::prepare',
- sprintf(
- /* translators: %s: Value type. */
- __( 'Unsupported value type (%s).' ),
- gettype( $arg )
- ),
- '4.8.2'
- );
- }
- }
- /*
- * Specify the formatting allowed in a placeholder. The following are allowed:
- *
- * - Sign specifier. eg, $+d
- * - Numbered placeholders. eg, %1$s
- * - Padding specifier, including custom padding characters. eg, %05s, %'#5s
- * - Alignment specifier. eg, %05-s
- * - Precision specifier. eg, %.2f
- */
- $allowed_format = '(?:[1-9][0-9]*[$])?[-+0-9]*(?: |0|\'.)?[-+0-9]*(?:\.[0-9]+)?';
- /*
- * If a %s placeholder already has quotes around it, removing the existing quotes and re-inserting them
- * ensures the quotes are consistent.
- *
- * For backward compatibility, this is only applied to %s, and not to placeholders like %1$s, which are frequently
- * used in the middle of longer strings, or as table name placeholders.
- */
- $query = str_replace( "'%s'", '%s', $query ); // Strip any existing single quotes.
- $query = str_replace( '"%s"', '%s', $query ); // Strip any existing double quotes.
- $query = preg_replace( '/(?<!%)%s/', "'%s'", $query ); // Quote the strings, avoiding escaped strings like %%s.
- $query = preg_replace( "/(?<!%)(%($allowed_format)?f)/", '%\\2F', $query ); // Force floats to be locale-unaware.
- $query = preg_replace( "/%(?:%|$|(?!($allowed_format)?[sdF]))/", '%%\\1', $query ); // Escape any unescaped percents.
- // Count the number of valid placeholders in the query.
- $placeholders = preg_match_all( "/(^|[^%]|(%%)+)%($allowed_format)?[sdF]/", $query, $matches );
- if ( count( $args ) !== $placeholders ) {
- if ( 1 === $placeholders && $passed_as_array ) {
- // If the passed query only expected one argument, but the wrong number of arguments were sent as an array, bail.
- wp_load_translations_early();
- _doing_it_wrong(
- 'wpdb::prepare',
- __( 'The query only expected one placeholder, but an array of multiple placeholders was sent.' ),
- '4.9.0'
- );
- return;
- } else {
- /*
- * If we don't have the right number of placeholders, but they were passed as individual arguments,
- * or we were expecting multiple arguments in an array, throw a warning.
- */
- wp_load_translations_early();
- _doing_it_wrong(
- 'wpdb::prepare',
- sprintf(
- /* translators: 1: Number of placeholders, 2: Number of arguments passed. */
- __( 'The query does not contain the correct number of placeholders (%1$d) for the number of arguments passed (%2$d).' ),
- $placeholders,
- count( $args )
- ),
- '4.8.3'
- );
- }
- }
- array_walk( $args, array( $this, 'escape_by_ref' ) );
- $query = vsprintf( $query, $args );
- return $this->add_placeholder_escape( $query );
- }
- /**
- * First half of escaping for LIKE special characters % and _ before preparing for MySQL.
- *
- * Use this only before wpdb::prepare() or esc_sql(). Reversing the order is very bad for security.
- *
- * Example Prepared Statement:
- *
- * $wild = '%';
- * $find = 'only 43% of planets';
- * $like = $wild . $wpdb->esc_like( $find ) . $wild;
- * $sql = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_content LIKE %s", $like );
- *
- * Example Escape Chain:
- *
- * $sql = esc_sql( $wpdb->esc_like( $input ) );
- *
- * @since 4.0.0
- *
- * @param string $text The raw text to be escaped. The input typed by the user
- * should have no extra or deleted slashes.
- * @return string Text in the form of a LIKE phrase. The output is not SQL safe.
- * Call wpdb::prepare() or wpdb::_real_escape() next.
- */
- public function esc_like( $text ) {
- return addcslashes( $text, '_%\\' );
- }
- /**
- * Prints 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 void|false Void if the showing of errors is enabled, false if disabled.
- */
- public function print_error( $str = '' ) {
- global $EZSQL_ERROR;
- if ( ! $str ) {
- if ( $this->use_mysqli ) {
- $str = mysqli_error( $this->dbh );
- } else {
- $str = mysql_error( $this->dbh );
- }
- }
- $EZSQL_ERROR[] = array(
- 'query' => $this->last_query,
- 'error_str' => $str,
- );
- if ( $this->suppress_errors ) {
- return false;
- }
- wp_load_translations_early();
- $caller = $this->get_caller();
- if ( $caller ) {
- /* translators: 1: Database error message, 2: SQL query, 3: Name of the calling function. */
- $error_str = sprintf( __( 'WordPress database error %1$s for query %2$s made by %3$s' ), $str, $this->last_query, $caller );
- } else {
- /* translators: 1: Database error message, 2: SQL query. */
- $error_str = sprintf( __( 'WordPress database error %1$s for query %2$s' ), $str, $this->last_query );
- }
- error_log( $error_str );
- // Are we showing errors?
- if ( ! $this->show_errors ) {
- return false;
- }
- // If there is an error then take note of it.
- if ( is_multisite() ) {
- $msg = sprintf(
- "%s [%s]\n%s\n",
- __( 'WordPress database error:' ),
- $str,
- $this->last_query
- );
- 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 );
- printf(
- '<div id="error"><p class="wpdberror"><strong>%s</strong> [%s]<br /><code>%s</code></p></div>',
- __( 'WordPress database error:' ),
- $str,
- $query
- );
- }
- }
- /**
- * 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 errors.
- *
- * @since 0.71
- *
- * @see wpdb::hide_errors()
- *
- * @param bool $show Optional. Whether to show errors. Default true.
- * @return bool Whether showing of errors was previously active.
- */
- public 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 previously active.
- */
- public function hide_errors() {
- $show = $this->show_errors;
- $this->show_errors = false;
- return $show;
- }
- /**
- * Enables or disables suppressing of database errors.
- *
- * By default database errors are suppressed.
- *
- * @since 2.5.0
- *
- * @see wpdb::hide_errors()
- *
- * @param bool $suppress Optional. Whether to suppress errors. Default true.
- * @return bool Whether suppressing of errors was previously active.
- */
- public function suppress_errors( $suppress = true ) {
- $errors = $this->suppress_errors;
- $this->suppress_errors = (bool) $suppress;
- return $errors;
- }
- /**
- * Kills cached query results.
- *
- * @since 0.71
- */
- public function flush() {
- $this->last_result = array();
- $this->col_info = null;
- $this->last_query = null;
- $this->rows_affected = 0;
- $this->num_rows = 0;
- $this->last_error = '';
- if ( $this->use_mysqli && $this->result instanceof mysqli_result ) {
- mysqli_free_result( $this->result );
- $this->result = null;
- // Sanity check before using the handle.
- if ( empty( $this->dbh ) || ! ( $this->dbh instanceof mysqli ) ) {
- return;
- }
- // Clear out any results from a multi-query.
- while ( mysqli_more_results( $this->dbh ) ) {
- mysqli_next_result( $this->dbh );
- }
- } elseif ( is_resource( $this->result ) ) {
- mysql_free_result( $this->result );
- }
- }
- /**
- * Connects to and selects database.
- *
- * If $allow_bail is false, the lack of database connection will need to be handled manually.
- *
- * @since 3.0.0
- * @since 3.9.0 $allow_bail parameter added.
- *
- * @param bool $allow_bail Optional. Allows the function to bail. Default true.
- * @return bool True with a successful connection, false on failure.
- */
- public function db_connect( $allow_bail = true ) {
- $this->is_mysql = true;
- /*
- * Deprecated in 3.9+ when using MySQLi. No equivalent
- * $new_link parameter exists for mysqli_* functions.
- */
- $new_link = defined( 'MYSQL_NEW_LINK' ) ? MYSQL_NEW_LINK : true;
- $client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0;
- if ( $this->use_mysqli ) {
- $this->dbh = mysqli_init();
- $host = $this->dbhost;
- $port = null;
- $socket = null;
- $is_ipv6 = false;
- $host_data = $this->parse_db_host( $this->dbhost );
- if ( $host_data ) {
- list( $host, $port, $socket, $is_ipv6 ) = $host_data;
- }
- /*
- * If using the `mysqlnd` library, the IPv6 address needs to be enclosed
- * in square brackets, whereas it doesn't while using the `libmysqlclient` library.
- * @see https://bugs.php.net/bug.php?id=67563
- */
- if ( $is_ipv6 && extension_loaded( 'mysqlnd' ) ) {
- $host = "[$host]";
- }
- if ( WP_DEBUG ) {
- mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
- } else {
- // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
- @mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
- }
- if ( $this->dbh->connect_errno ) {
- $this->dbh = null;
- /*
- * It's possible ext/mysqli is misconfigured. Fall back to ext/mysql if:
- * - We haven't previously connected, and
- * - WP_USE_EXT_MYSQL isn't set to false, and
- * - ext/mysql is loaded.
- */
- $attempt_fallback = true;
- if ( $this->has_connected ) {
- $attempt_fallback = false;
- } elseif ( defined( 'WP_USE_EXT_MYSQL' ) && ! WP_USE_EXT_MYSQL ) {
- $attempt_fallback = false;
- } elseif ( ! function_exists( 'mysql_connect' ) ) {
- $attempt_fallback = false;
- }
- if ( $attempt_fallback ) {
- $this->use_mysqli = false;
- return $this->db_connect( $allow_bail );
- }
- }
- } else {
- if ( WP_DEBUG ) {
- $this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
- } else {
- // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
- $this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
- }
- }
- if ( ! $this->dbh && $allow_bail ) {
- wp_load_translations_early();
- // Load custom DB error template, if present.
- if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
- require_once WP_CONTENT_DIR . '/db-error.php';
- die();
- }
- $message = '<h1>' . __( 'Error establishing a database connection' ) . "</h1>\n";
- $message .= '<p>' . sprintf(
- /* translators: 1: wp-config.php, 2: Database host. */
- __( 'This either means that the username and password information in your %1$s file is incorrect or we can’t contact the database server at %2$s. This could mean your host’s database server is down.' ),
- '<code>wp-config.php</code>',
- '<code>' . htmlspecialchars( $this->dbhost, ENT_QUOTES ) . '</code>'
- ) . "</p>\n";
- $message .= "<ul>\n";
- $message .= '<li>' . __( 'Are you sure you have the correct username and password?' ) . "</li>\n";
- $message .= '<li>' . __( 'Are you sure you have typed the correct hostname?' ) . "</li>\n";
- $message .= '<li>' . __( 'Are you sure the database server is running?' ) . "</li>\n";
- $message .= "</ul>\n";
- $message .= '<p>' . sprintf(
- /* translators: %s: Support forums URL. */
- __( '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="%s">WordPress Support Forums</a>.' ),
- __( 'https://wordpress.org/support/forums/' )
- ) . "</p>\n";
- $this->bail( $message, 'db_connect_fail' );
- return false;
- } elseif ( $this->dbh ) {
- if ( ! $this->has_connected ) {
- $this->init_charset();
- }
- $this->has_connected = true;
- $this->set_charset( $this->dbh );
- $this->ready = true;
- $this->set_sql_mode();
- $this->select( $this->dbname, $this->dbh );
- return true;
- }
- return false;
- }
- /**
- * Parses the DB_HOST setting to interpret it for mysqli_real_connect().
- *
- * mysqli_real_connect() doesn't support the host param including a port or socket
- * like mysql_connect() does. This duplicates how mysql_connect() detects a port
- * and/or socket file.
- *
- * @since 4.9.0
- *
- * @param string $host The DB_HOST setting to parse.
- * @return array|false Array containing the host, the port, the socket and
- * whether it is an IPv6 address, in that order.
- * False if $host couldn't be parsed.
- */
- public function parse_db_host( $host ) {
- $port = null;
- $socket = null;
- $is_ipv6 = false;
- // First peel off the socket parameter from the right, if it exists.
- $socket_pos = strpos( $host, ':/' );
- if ( false !== $socket_pos ) {
- $socket = substr( $host, $socket_pos + 1 );
- $host = substr( $host, 0, $socket_pos );
- }
- // We need to check for an IPv6 address first.
- // An IPv6 address will always contain at least two colons.
- if ( substr_count( $host, ':' ) > 1 ) {
- $pattern = '#^(?:\[)?(?P<host>[0-9a-fA-F:]+)(?:\]:(?P<port>[\d]+))?#';
- $is_ipv6 = true;
- } else {
- // We seem to be dealing with an IPv4 address.
- $pattern = '#^(?P<host>[^:/]*)(?::(?P<port>[\d]+))?#';
- }
- $matches = array();
- $result = preg_match( $pattern, $host, $matches );
- if ( 1 !== $result ) {
- // Couldn't parse the address, bail.
- return false;
- }
- $host = '';
- foreach ( array( 'host', 'port' ) as $component ) {
- if ( ! empty( $matches[ $component ] ) ) {
- $$component = $matches[ $component ];
- }
- }
- return array( $host, $port, $socket, $is_ipv6 );
- }
- /**
- * Checks that the connection to the database is still up. If not, try to reconnect.
- *
- * If this function is unable to reconnect, it will forcibly die, or if called
- * after the {@see 'template_redirect'} hook has been fired, return false instead.
- *
- * If $allow_bail is false, the lack of database connection will need to be handled manually.
- *
- * @since 3.9.0
- *
- * @param bool $allow_bail Optional. Allows the function to bail. Default true.
- * @return bool|void True if the connection is up.
- */
- public function check_connection( $allow_bail = true ) {
- if ( $this->use_mysqli ) {
- if ( ! empty( $this->dbh ) && mysqli_ping( $this->dbh ) ) {
- return true;
- }
- } else {
- if ( ! empty( $this->dbh ) && mysql_ping( $this->dbh ) ) {
- return true;
- }
- }
- $error_reporting = false;
- // Disable warnings, as we don't want to see a multitude of "unable to connect" messages.
- if ( WP_DEBUG ) {
- $error_reporting = error_reporting();
- error_reporting( $error_reporting & ~E_WARNING );
- }
- for ( $tries = 1; $tries <= $this->reconnect_retries; $tries++ ) {
- // On the last try, re-enable warnings. We want to see a single instance
- // of the "unable to connect" message on the bail() screen, if it appears.
- if ( $this->reconnect_retries === $tries && WP_DEBUG ) {
- error_reporting( $error_reporting );
- }
- if ( $this->db_connect( false ) ) {
- if ( $error_reporting ) {
- error_reporting( $error_reporting );
- }
- return true;
- }
- sleep( 1 );
- }
- // If template_redirect has already happened, it's too late for wp_die()/dead_db().
- // Let's just return and hope for the best.
- if ( did_action( 'template_redirect' ) ) {
- return false;
- }
- if ( ! $allow_bail ) {
- return false;
- }
- wp_load_translations_early();
- $message = '<h1>' . __( 'Error reconnecting to the database' ) . "</h1>\n";
- $message .= '<p>' . sprintf(
- /* translators: %s: Database host. */
- __( 'This means that we lost contact with the database server at %s. This could mean your host’s database server is down.' ),
- '<code>' . htmlspecialchars( $this->dbhost, ENT_QUOTES ) . '</code>'
- ) . "</p>\n";
- $message .= "<ul>\n";
- $message .= '<li>' . __( 'Are you sure the database server is running?' ) . "</li>\n";
- $message .= '<li>' . __( 'Are you sure the database server is not under particularly heavy load?' ) . "</li>\n";
- $message .= "</ul>\n";
- $message .= '<p>' . sprintf(
- /* translators: %s: Support forums URL. */
- __( '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="%s">WordPress Support Forums</a>.' ),
- __( 'https://wordpress.org/support/forums/' )
- ) . "</p>\n";
- // We weren't able to reconnect, so we better bail.
- $this->bail( $message, 'db_connect_fail' );
- // Call dead_db() if bail didn't die, because this database is no more.
- // It has ceased to be (at least temporarily).
- dead_db();
- }
- /**
- * Performs a MySQL database query, using current database connection.
- *
- * More information can be found on the Codex page.
- *
- * @since 0.71
- *
- * @link https://codex.wordpress.org/Function_Reference/wpdb_Class
- *
- * @param string $query Database query.
- * @return int|bool Boolean true for CREATE, ALTER, TRUNCATE and DROP queries. Number of rows
- * affected/selected for all other queries. Boolean false on error.
- */
- public function query( $query ) {
- if ( ! $this->ready ) {
- $this->check_current_query = true;
- return false;
- }
- /**
- * Filters the database query.
- *
- * Some queries are made before the plugins have been loaded,
- * and thus cannot be filtered with this method.
- *
- * @since 2.1.0
- *
- * @param string $query Database query.
- */
- $query = apply_filters( 'query', $query );
- $this->flush();
- // Log how the function was called.
- $this->func_call = "\$db->query(\"$query\")";
- // If we're writing to the database, make sure the query will write safely.
- if ( $this->check_current_query && ! $this->check_ascii( $query ) ) {
- $stripped_query = $this->strip_invalid_text_from_query( $query );
- // strip_invalid_text_from_query() can perform queries, so we need
- // to flush again, just to make sure everything is clear.
- $this->flush();
- if ( $stripped_query !== $query ) {
- $this->insert_id = 0;
- return false;
- }
- }
- $this->check_current_query = true;
- // Keep track of the last query for debug.
- $this->last_query = $query;
- $this->_do_query( $query );
- // MySQL server has gone away, try to reconnect.
- $mysql_errno = 0;
- if ( ! empty( $this->dbh ) ) {
- if ( $this->use_mysqli ) {
- if ( $this->dbh instanceof mysqli ) {
- $mysql_errno = mysqli_errno( $this->dbh );
- } else {
- // $dbh is defined, but isn't a real connection.
- // Something has gone horribly wrong, let's try a reconnect.
- $mysql_errno = 2006;
- }
- } else {
- if ( is_resource( $this->dbh ) ) {
- $mysql_errno = mysql_errno( $this->dbh );
- } else {
- $mysql_errno = 2006;
- }
- }
- }
- if ( empty( $this->dbh ) || 2006 == $mysql_errno ) {
- if ( $this->check_connection() ) {
- $this->_do_query( $query );
- } else {
- $this->insert_id = 0;
- return false;
- }
- }
- // If there is an error then take note of it.
- if ( $this->use_mysqli ) {
- if ( $this->dbh instanceof mysqli ) {
- $this->last_error = mysqli_error( $this->dbh );
- } else {
- $this->last_error = __( 'Unable to retrieve the error message from MySQL' );
- }
- } else {
- if ( is_resource( $this->dbh ) ) {
- $this->last_error = mysql_error( $this->dbh );
- } else {
- $this->last_error = __( 'Unable to retrieve the error message from MySQL' );
- }
- }
- if ( $this->last_error ) {
- // Clear insert_id on a subsequent failed insert.
- if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {
- $this->insert_id = 0;
- }
- $this->print_error();
- return false;
- }
- if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) {
- $return_val = $this->result;
- } elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) {
- if ( $this->use_mysqli ) {
- $this->rows_affected = mysqli_affected_rows( $this->dbh );
- } else {
- $this->rows_affected = mysql_affected_rows( $this->dbh );
- }
- // Take note of the insert_id.
- if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {
- if ( $this->use_mysqli ) {
- $this->insert_id = mysqli_insert_id( $this->dbh );
- } else {
- $this->insert_id = mysql_insert_id( $this->dbh );
- }
- }
- // Return number of rows affected.
- $return_val = $this->rows_affected;
- } else {
- $num_rows = 0;
- if ( $this->use_mysqli && $this->result instanceof mysqli_result ) {
- while ( $row = mysqli_fetch_object( $this->result ) ) {
- $this->last_result[ $num_rows ] = $row;
- $num_rows++;
- }
- } elseif ( is_resource( $this->result ) ) {
- while ( $row = mysql_fetch_object( $this->result ) ) {
- $this->last_result[ $num_rows ] = $row;
- $num_rows++;
- }
- }
- // Log and return the number of rows selected.
- $this->num_rows = $num_rows;
- $return_val = $num_rows;
- }
- return $return_val;
- }
- /**
- * Internal function to perform the mysql_query() call.
- *
- * @since 3.9.0
- *
- * @see wpdb::query()
- *
- * @param string $query The query to run.
- */
- private function _do_query( $query ) {
- if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
- $this->timer_start();
- }
- if ( ! empty( $this->dbh ) && $this->use_mysqli ) {
- $this->result = mysqli_query( $this->dbh, $query );
- } elseif ( ! empty( $this->dbh ) ) {
- $this->result = mysql_query( $query, $this->dbh );
- }
- $this->num_queries++;
- if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
- $this->log_query(
- $query,
- $this->timer_stop(),
- $this->get_caller(),
- $this->time_start,
- array()
- );
- }
- }
- /**
- * Logs query data.
- *
- * @since 5.3.0
- *
- * @param string $query The query's SQL.
- * @param float $query_time Total time spent on the query, in seconds.
- * @param string $query_callstack Comma-separated list of the calling functions.
- * @param float $query_start Unix timestamp of the time at the start of the query.
- * @param array $query_data Custom query data.
- */
- public function log_query( $query, $query_time, $query_callstack, $query_start, $query_data ) {
- /**
- * Filters the custom query data being logged.
- *
- * Caution should be used when modifying any of this data, it is recommended that any additional
- * information you need to store about a query be added as a new associative entry to the fourth
- * element $query_data.
- *
- * @since 5.3.0
- *
- * @param array $query_data Custom query data.
- * @param string $query The query's SQL.
- * @param float $query_time Total time spent on the query, in seconds.
- * @param string $query_callstack Comma-separated list of the calling functions.
- * @param float $query_start Unix timestamp of the time at the start of the query.
- */
- $query_data = apply_filters( 'log_query_custom_data', $query_data, $query, $query_time, $query_callstack, $query_start );
- $this->queries[] = array(
- $query,
- $query_time,
- $query_callstack,
- $query_start,
- $query_data,
- );
- }
- /**
- * Generates and returns a placeholder escape string for use in queries returned by ::prepare().
- *
- * @since 4.8.3
- *
- * @return string String to escape placeholders.
- */
- public function placeholder_escape() {
- static $placeholder;
- if ( ! $placeholder ) {
- // If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
- $algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
- // Old WP installs may not have AUTH_SALT defined.
- $salt = defined( 'AUTH_SALT' ) && AUTH_SALT ? AUTH_SALT : (string) rand();
- $placeholder = '{' . hash_hmac( $algo, uniqid( $salt, true ), $salt ) . '}';
- }
- /*
- * Add the filter to remove the placeholder escaper. Uses priority 0, so that anything
- * else attached to this filter will receive the query with the placeholder string removed.
- */
- if ( false === has_filter( 'query', array( $this, 'remove_placeholder_escape' ) ) ) {
- add_filter( 'query', array( $this, 'remove_placeholder_escape' ), 0 );
- }
- return $placeholder;
- }
- /**
- * Adds a placeholder escape string, to escape anything that resembles a printf() placeholder.
- *
- * @since 4.8.3
- *
- * @param string $query The query to escape.
- * @return string The query with the placeholder escape string inserted where necessary.
- */
- public function add_placeholder_escape( $query ) {
- /*
- * To prevent returning anything that even vaguely resembles a placeholder,
- * we clobber every % we can find.
- */
- return str_replace( '%', $this->placeholder_escape(), $query );
- }
- /**
- * Removes the placeholder escape strings from a query.
- *
- * @since 4.8.3
- *
- * @param string $query The query from which the placeholder will be removed.
- * @return string The query with the placeholder removed.
- */
- public function remove_placeholder_escape( $query ) {
- return str_replace( $this->placeholder_escape(), '%', $query );
- }
- /**
- * Inserts a row into the table.
- *
- * Examples:
- * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 'bar' ) )
- * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) )
- *
- * @since 2.5.0
- *
- * @see wpdb::prepare()
- * @see wpdb::$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).
- * Sending a null value will cause the column to be set to NULL - the corresponding
- * format is ignored in this case.
- * @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', '%f', '%s' (integer, float, 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.
- */
- public function insert( $table, $data, $format = null ) {
- return $this->_insert_replace_helper( $table, $data, $format, 'INSERT' );
- }
- /**
- * Replaces a row in the table.
- *
- * Examples:
- * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 'bar' ) )
- * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) )
- *
- * @since 3.0.0
- *
- * @see wpdb::prepare()
- * @see wpdb::$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).
- * Sending a null value will cause the column to be set to NULL - the corresponding
- * format is ignored in this case.
- * @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', '%f', '%s' (integer, float, 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.
- */
- public 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 $type argument.
- *
- * @since 3.0.0
- *
- * @see wpdb::prepare()
- * @see wpdb::$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).
- * Sending a null value will cause the column to be set to NULL - the corresponding
- * format is ignored in this case.
- * @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', '%f', '%s' (integer, float, string).
- * If omitted, all values in $data will be treated as strings unless otherwise
- * specified in wpdb::$field_types.
- * @param string $type Optional. Type of operation. Possible values include 'INSERT' or 'REPLACE'.
- * Default 'INSERT'.
- * @return int|false The number of rows affected, or false on error.
- */
- function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) {
- $this->insert_id = 0;
- if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ), true ) ) {
- return false;
- }
- $data = $this->process_fields( $table, $data, $format );
- if ( false === $data ) {
- return false;
- }
- $formats = array();
- $values = array();
- foreach ( $data as $value ) {
- if ( is_null( $value['value'] ) ) {
- $formats[] = 'NULL';
- continue;
- }
- $formats[] = $value['format'];
- $values[] = $value['value'];
- }
- $fields = '`' . implode( '`, `', array_keys( $data ) ) . '`';
- $formats = implode( ', ', $formats );
- $sql = "$type INTO `$table` ($fields) VALUES ($formats)";
- $this->check_current_query = false;
- return $this->query( $this->prepare( $sql, $values ) );
- }
- /**
- * Updates a row in the table.
- *
- * Examples:
- * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 'bar' ), array( 'ID' => 1 ) )
- * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) )
- *
- * @since 2.5.0
- *
- * @see wpdb::prepare()
- * @see wpdb::$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).
- * Sending a null value will cause the column to be set to NULL - the corresponding
- * format is ignored in this case.
- * @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".
- * Sending a null value will create an IS NULL comparison - the corresponding
- * format will be ignored in this case.
- * @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', '%f', '%s' (integer, float, string).
- * If omitted, all values in $data will be treated as strings unless otherwise
- * specified in wpdb::$field_types.
- * @param array|string $where_format 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', '%f', '%s' (integer, float, string).
- * If omitted, all values in $where will be treated as strings.
- * @return int|false The number of rows updated, or false on error.
- */
- public function update( $table, $data, $where, $format = null, $where_format = null ) {
- if ( ! is_array( $data ) || ! is_array( $where ) ) {
- return false;
- }
- $data = $this->process_fields( $table, $data, $format );
- if ( false === $data ) {
- return false;
- }
- $where = $this->process_fields( $table, $where, $where_format );
- if ( false === $where ) {
- return false;
- }
- $fields = array();
- $conditions = array();
- $values = array();
- foreach ( $data as $field => $value ) {
- if ( is_null( $value['value'] ) ) {
- $fields[] = "`$field` = NULL";
- continue;
- }
- $fields[] = "`$field` = " . $value['format'];
- $values[] = $value['value'];
- }
- foreach ( $where as $field => $value ) {
- if ( is_null( $value['value'] ) ) {
- $conditions[] = "`$field` IS NULL";
- continue;
- }
- $conditions[] = "`$field` = " . $value['format'];
- $values[] = $value['value'];
- }
- $fields = implode( ', ', $fields );
- $conditions = implode( ' AND ', $conditions );
- $sql = "UPDATE `$table` SET $fields WHERE $conditions";
- $this->check_current_query = false;
- return $this->query( $this->prepare( $sql, $values ) );
- }
- /**
- * Deletes a row in the table.
- *
- * Examples:
- * wpdb::delete( 'table', array( 'ID' => 1 ) )
- * wpdb::delete( 'table', array( 'ID' => 1 ), array( '%d' ) )
- *
- * @since 3.4.0
- *
- * @see wpdb::prepare()
- * @see wpdb::$field_types
- * @see wp_set_wpdb_vars()
- *
- * @param string $table Table name.
- * @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".
- * Sending a null value will create an IS NULL comparison - the corresponding
- * format will be ignored in this case.
- * @param array|string $where_format 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', '%f', '%s' (integer, float, 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 updated, or false on error.
- */
- public function delete( $table, $where, $where_format = null ) {
- if ( ! is_array( $where ) ) {
- return false;
- }
- $where = $this->process_fields( $table, $where, $where_format );
- if ( false === $where ) {
- return false;
- }
- $conditions = array();
- $values = array();
- foreach ( $where as $field => $value ) {
- if ( is_null( $value['value'] ) ) {
- $conditions[] = "`$field` IS NULL";
- continue;
- }
- $conditions[] = "`$field` = " . $value['format'];
- $values[] = $value['value'];
- }
- $conditions = implode( ' AND ', $conditions );
- $sql = "DELETE FROM `$table` WHERE $conditions";
- $this->check_current_query = false;
- return $this->query( $this->prepare( $sql, $values ) );
- }
- /**
- * Processes arrays of field/value pairs and field formats.
- *
- * This is a helper method for wpdb's CRUD methods, which take field/value pairs
- * for inserts, updates, and where clauses. This method first pairs each value
- * with a format. Then it determines the charset of that field, using that
- * to determine if any invalid text would be stripped. If text is stripped,
- * then field processing is rejected and the query fails.
- *
- * @since 4.2.0
- *
- * @param string $table Table name.
- * @param array $data Field/value pair.
- * @param mixed $format Format for each field.
- * @return array|false An array of fields that contain paired value and formats.
- * False for invalid values.
- */
- protected function process_fields( $table, $data, $format ) {
- $data = $this->process_field_formats( $data, $format );
- if ( false === $data ) {
- return false;
- }
- $data = $this->process_field_charsets( $data, $table );
- if ( false === $data ) {
- return false;
- }
- $data = $this->process_field_lengths( $data, $table );
- if ( false === $data ) {
- return false;
- }
- $converted_data = $this->strip_invalid_text( $data );
- if ( $data !== $converted_data ) {
- return false;
- }
- return $data;
- }
- /**
- * Prepares arrays of value/format pairs as passed to wpdb CRUD methods.
- *
- * @since 4.2.0
- *
- * @param array $data Array of fields to values.
- * @param mixed $format Formats to be mapped to the values in $data.
- * @return array Array, keyed by field names with values being an array
- * of 'value' and 'format' keys.
- */
- protected function process_field_formats( $data, $format ) {
- $formats = (array) $format;
- $original_formats = $formats;
- foreach ( $data as $field => $value ) {
- $value = array(
- 'value' => $value,
- 'format' => '%s',
- );
- if ( ! empty( $format ) ) {
- $value['format'] = array_shift( $formats );
- if ( ! $value['format'] ) {
- $value['format'] = reset( $original_formats );
- }
- } elseif ( isset( $this->field_types[ $field ] ) ) {
- $value['format'] = $this->field_types[ $field ];
- }
- $data[ $field ] = $value;
- }
- return $data;
- }
- /**
- * Adds field charsets to field/value/format arrays generated by wpdb::process_field_formats().
- *
- * @since 4.2.0
- *
- * @param array $data As it comes from the wpdb::process_field_formats() method.
- * @param string $table Table name.
- * @return array|false The same array as $data with additional 'charset' keys.
- * False on failure.
- */
- protected function process_field_charsets( $data, $table ) {
- foreach ( $data as $field => $value ) {
- if ( '%d' === $value['format'] || '%f' === $value['format'] ) {
- /*
- * We can skip this field if we know it isn't a string.
- * This checks %d/%f versus ! %s because its sprintf() could take more.
- */
- $value['charset'] = false;
- } else {
- $value['charset'] = $this->get_col_charset( $table, $field );
- if ( is_wp_error( $value['charset'] ) ) {
- return false;
- }
- }
- $data[ $field ] = $value;
- }
- return $data;
- }
- /**
- * For string fields, records the maximum string length that field can safely save.
- *
- * @since 4.2.1
- *
- * @param array $data As it comes from the wpdb::process_field_charsets() method.
- * @param string $table Table name.
- * @return array|false The same array as $data with additional 'length' keys, or false if
- * any of the values were too long for their corresponding field.
- */
- protected function process_field_lengths( $data, $table ) {
- foreach ( $data as $field => $value ) {
- if ( '%d' === $value['format'] || '%f' === $value['format'] ) {
- /*
- * We can skip this field if we know it isn't a string.
- * This checks %d/%f versus ! %s because its sprintf() could take more.
- */
- $value['length'] = false;
- } else {
- $value['length'] = $this->get_col_length( $table, $field );
- if ( is_wp_error( $value['length'] ) ) {
- return false;
- }
- }
- $data[ $field ] = $value;
- }
- return $data;
- }
- /**
- * Retrieves 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,
- * the value in the column and row specified is returned. If $query is null,
- * the value in the specified column and row from the previous SQL result is returned.
- *
- * @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.
- */
- public function get_var( $query = null, $x = 0, $y = 0 ) {
- $this->func_call = "\$db->get_var(\"$query\", $x, $y)";
- if ( $this->check_current_query && $this->check_safe_collation( $query ) ) {
- $this->check_current_query = false;
- }
- if ( $query ) {
- $this->query( $query );
- }
- // Extract var out of cached results based on 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;
- }
- /**
- * Retrieves 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. The required return type. Possible values include
- * OBJECT, ARRAY_A, or ARRAY_N, which correspond to an stdClass object,
- * an associative array, or a numeric array, respectively. Default OBJECT.
- * @param int $y Optional. Row to return. Indexed from 0.
- * @return array|object|null|void Database query result in format specified by $output or null on failure.
- */
- public function get_row( $query = null, $output = OBJECT, $y = 0 ) {
- $this->func_call = "\$db->get_row(\"$query\",$output,$y)";
- if ( $this->check_current_query && $this->check_safe_collation( $query ) ) {
- $this->check_current_query = false;
- }
- if ( $query ) {
- $this->query( $query );
- } else {
- return null;
- }
- if ( ! isset( $this->last_result[ $y ] ) ) {
- return null;
- }
- if ( OBJECT == $output ) {
- return $this->last_result[ $y ] ? $this->last_result[ $y ] : null;
- } elseif ( ARRAY_A == $output ) {
- return $this->last_result[ $y ] ? get_object_vars( $this->last_result[ $y ] ) : null;
- } elseif ( ARRAY_N == $output ) {
- return $this->last_result[ $y ] ? array_values( get_object_vars( $this->last_result[ $y ] ) ) : null;
- } elseif ( OBJECT === strtoupper( $output ) ) {
- // Back compat for OBJECT being previously case-insensitive.
- return $this->last_result[ $y ] ? $this->last_result[ $y ] : null;
- } else {
- $this->print_error( ' $db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N' );
- }
- }
- /**
- * Retrieves 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, the column specified is returned.
- * If $query is null, the specified column from the previous SQL result is returned.
- *
- * @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.
- */
- public function get_col( $query = null, $x = 0 ) {
- if ( $this->check_current_query && $this->check_safe_collation( $query ) ) {
- $this->check_current_query = false;
- }
- if ( $query ) {
- $this->query( $query );
- }
- $new_array = array();
- // Extract the column values.
- if ( $this->last_result ) {
- for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) {
- $new_array[ $i ] = $this->get_var( null, $x, $i );
- }
- }
- return $new_array;
- }
- /**
- * Retrieves 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 array|object|null Database query results.
- *
- */
- public function get_results( $query = null, $output = OBJECT ) {
- $this->func_call = "\$db->get_results(\"$query\", $output)";
- if ( $this->check_current_query && $this->check_safe_collation( $query ) ) {
- $this->check_current_query = false;
- }
- if ( $query ) {
- $this->query( $query );
- } else {
- return null;
- }
- $new_array = array();
- if ( OBJECT == $output ) {
- // Return an integer-keyed array of row objects.
- return $this->last_result;
- } elseif ( OBJECT_K == $output ) {
- // Return an array of row objects with keys from column 1.
- // (Duplicates are discarded.)
- if ( $this->last_result ) {
- foreach ( $this->last_result as $row ) {
- $var_by_ref = get_object_vars( $row );
- $key = array_shift( $var_by_ref );
- if ( ! isset( $new_array[ $key ] ) ) {
- $new_array[ $key ] = $row;
- }
- }
- }
- return $new_array;
- } elseif ( ARRAY_A == $output || ARRAY_N == $output ) {
- // Return an integer-keyed array of...
- if ( $this->last_result ) {
- foreach ( (array) $this->last_result as $row ) {
- if ( ARRAY_N == $output ) {
- // ...integer-keyed row arrays.
- $new_array[] = array_values( get_object_vars( $row ) );
- } else {
- // ...column name-keyed row arrays.
- $new_array[] = get_object_vars( $row );
- }
- }
- }
- return $new_array;
- } elseif ( strtoupper( $output ) === OBJECT ) {
- // Back compat for OBJECT being previously case-insensitive.
- return $this->last_result;
- }
- return null;
- }
- /**
- * Retrieves the character set for the given table.
- *
- * @since 4.2.0
- *
- * @param string $table Table name.
- * @return string|WP_Error Table character set, WP_Error object if it couldn't be found.
- */
- protected function get_table_charset( $table ) {
- $tablekey = strtolower( $table );
- /**
- * Filters the table charset value before the DB is checked.
- *
- * Passing a non-null value to the filter will effectively short-circuit
- * checking the DB for the charset, returning that value instead.
- *
- * @since 4.2.0
- *
- * @param string|null $charset The character set to use. Default null.
- * @param string $table The name of the table being checked.
- */
- $charset = apply_filters( 'pre_get_table_charset', null, $table );
- if ( null !== $charset ) {
- return $charset;
- }
- if ( isset( $this->table_charset[ $tablekey ] ) ) {
- return $this->table_charset[ $tablekey ];
- }
- $charsets = array();
- $columns = array();
- $table_parts = explode( '.', $table );
- $table = '`' . implode( '`.`', $table_parts ) . '`';
- $results = $this->get_results( "SHOW FULL COLUMNS FROM $table" );
- if ( ! $results ) {
- return new WP_Error( 'wpdb_get_table_charset_failure' );
- }
- foreach ( $results as $column ) {
- $columns[ strtolower( $column->Field ) ] = $column;
- }
- $this->col_meta[ $tablekey ] = $columns;
- foreach ( $columns as $column ) {
- if ( ! empty( $column->Collation ) ) {
- list( $charset ) = explode( '_', $column->Collation );
- // If the current connection can't support utf8mb4 characters, let's only send 3-byte utf8 characters.
- if ( 'utf8mb4' === $charset && ! $this->has_cap( 'utf8mb4' ) ) {
- $charset = 'utf8';
- }
- $charsets[ strtolower( $charset ) ] = true;
- }
- list( $type ) = explode( '(', $column->Type );
- // A binary/blob means the whole query gets treated like this.
- if ( in_array( strtoupper( $type ), array( 'BINARY', 'VARBINARY', 'TINYBLOB', 'MEDIUMBLOB', 'BLOB', 'LONGBLOB' ), true ) ) {
- $this->table_charset[ $tablekey ] = 'binary';
- return 'binary';
- }
- }
- // utf8mb3 is an alias for utf8.
- if ( isset( $charsets['utf8mb3'] ) ) {
- $charsets['utf8'] = true;
- unset( $charsets['utf8mb3'] );
- }
- // Check if we have more than one charset in play.
- $count = count( $charsets );
- if ( 1 === $count ) {
- $charset = key( $charsets );
- } elseif ( 0 === $count ) {
- // No charsets, assume this table can store whatever.
- $charset = false;
- } else {
- // More than one charset. Remove latin1 if present and recalculate.
- unset( $charsets['latin1'] );
- $count = count( $charsets );
- if ( 1 === $count ) {
- // Only one charset (besides latin1).
- $charset = key( $charsets );
- } elseif ( 2 === $count && isset( $charsets['utf8'], $charsets['utf8mb4'] ) ) {
- // Two charsets, but they're utf8 and utf8mb4, use utf8.
- $charset = 'utf8';
- } else {
- // Two mixed character sets. ascii.
- $charset = 'ascii';
- }
- }
- $this->table_charset[ $tablekey ] = $charset;
- return $charset;
- }
- /**
- * Retrieves the character set for the given column.
- *
- * @since 4.2.0
- *
- * @param string $table Table name.
- * @param string $column Column name.
- * @return string|false|WP_Error Column character set as a string. False if the column has
- * no character set. WP_Error object if there was an error.
- */
- public function get_col_charset( $table, $column ) {
- $tablekey = strtolower( $table );
- $columnkey = strtolower( $column );
- /**
- * Filters the column charset value before the DB is checked.
- *
- * Passing a non-null value to the filter will short-circuit
- * checking the DB for the charset, returning that value instead.
- *
- * @since 4.2.0
- *
- * @param string|null $charset The character set to use. Default null.
- * @param string $table The name of the table being checked.
- * @param string $column The name of the column being checked.
- */
- $charset = apply_filters( 'pre_get_col_charset', null, $table, $column );
- if ( null !== $charset ) {
- return $charset;
- }
- // Skip this entirely if this isn't a MySQL database.
- if ( empty( $this->is_mysql ) ) {
- return false;
- }
- if ( empty( $this->table_charset[ $tablekey ] ) ) {
- // This primes column information for us.
- $table_charset = $this->get_table_charset( $table );
- if ( is_wp_error( $table_charset ) ) {
- return $table_charset;
- }
- }
- // If still no column information, return the table charset.
- if ( empty( $this->col_meta[ $tablekey ] ) ) {
- return $this->table_charset[ $tablekey ];
- }
- // If this column doesn't exist, return the table charset.
- if ( empty( $this->col_meta[ $tablekey ][ $columnkey ] ) ) {
- return $this->table_charset[ $tablekey ];
- }
- // Return false when it's not a string column.
- if ( empty( $this->col_meta[ $tablekey ][ $columnkey ]->Collation ) ) {
- return false;
- }
- list( $charset ) = explode( '_', $this->col_meta[ $tablekey ][ $columnkey ]->Collation );
- return $charset;
- }
- /**
- * Retrieves the maximum string length allowed in a given column.
- *
- * The length may either be specified as a byte length or a character length.
- *
- * @since 4.2.1
- *
- * @param string $table Table name.
- * @param string $column Column name.
- * @return array|false|WP_Error array( 'length' => (int), 'type' => 'byte' | 'char' ).
- * False if the column has no length (for example, numeric column).
- * WP_Error object if there was an error.
- */
- public function get_col_length( $table, $column ) {
- $tablekey = strtolower( $table );
- $columnkey = strtolower( $column );
- // Skip this entirely if this isn't a MySQL database.
- if ( empty( $this->is_mysql ) ) {
- return false;
- }
- if ( empty( $this->col_meta[ $tablekey ] ) ) {
- // This primes column information for us.
- $table_charset = $this->get_table_charset( $table );
- if ( is_wp_error( $table_charset ) ) {
- return $table_charset;
- }
- }
- if ( empty( $this->col_meta[ $tablekey ][ $columnkey ] ) ) {
- return false;
- }
- $typeinfo = explode( '(', $this->col_meta[ $tablekey ][ $columnkey ]->Type );
- $type = strtolower( $typeinfo[0] );
- if ( ! empty( $typeinfo[1] ) ) {
- $length = trim( $typeinfo[1], ')' );
- } else {
- $length = false;
- }
- switch ( $type ) {
- case 'char':
- case 'varchar':
- return array(
- 'type' => 'char',
- 'length' => (int) $length,
- );
- case 'binary':
- case 'varbinary':
- return array(
- 'type' => 'byte',
- 'length' => (int) $length,
- );
- case 'tinyblob':
- case 'tinytext':
- return array(
- 'type' => 'byte',
- 'length' => 255, // 2^8 - 1
- );
- case 'blob':
- case 'text':
- return array(
- 'type' => 'byte',
- 'length' => 65535, // 2^16 - 1
- );
- case 'mediumblob':
- case 'mediumtext':
- return array(
- 'type' => 'byte',
- 'length' => 16777215, // 2^24 - 1
- );
- case 'longblob':
- case 'longtext':
- return array(
- 'type' => 'byte',
- 'length' => 4294967295, // 2^32 - 1
- );
- default:
- return false;
- }
- }
- /**
- * Checks if a string is ASCII.
- *
- * The negative regex is faster for non-ASCII strings, as it allows
- * the search to finish as soon as it encounters a non-ASCII character.
- *
- * @since 4.2.0
- *
- * @param string $string String to check.
- * @return bool True if ASCII, false if not.
- */
- protected function check_ascii( $string ) {
- if ( function_exists( 'mb_check_encoding' ) ) {
- if ( mb_check_encoding( $string, 'ASCII' ) ) {
- return true;
- }
- } elseif ( ! preg_match( '/[^\x00-\x7F]/', $string ) ) {
- return true;
- }
- return false;
- }
- /**
- * Checks if the query is accessing a collation considered safe on the current version of MySQL.
- *
- * @since 4.2.0
- *
- * @param string $query The query to check.
- * @return bool True if the collation is safe, false if it isn't.
- */
- protected function check_safe_collation( $query ) {
- if ( $this->checking_collation ) {
- return true;
- }
- // We don't need to check the collation for queries that don't read data.
- $query = ltrim( $query, "\r\n\t (" );
- if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN|CREATE)\s/i', $query ) ) {
- return true;
- }
- // All-ASCII queries don't need extra checking.
- if ( $this->check_ascii( $query ) ) {
- return true;
- }
- $table = $this->get_table_from_query( $query );
- if ( ! $table ) {
- return false;
- }
- $this->checking_collation = true;
- $collation = $this->get_table_charset( $table );
- $this->checking_collation = false;
- // Tables with no collation, or latin1 only, don't need extra checking.
- if ( false === $collation || 'latin1' === $collation ) {
- return true;
- }
- $table = strtolower( $table );
- if ( empty( $this->col_meta[ $table ] ) ) {
- return false;
- }
- // If any of the columns don't have one of these collations, it needs more sanity checking.
- foreach ( $this->col_meta[ $table ] as $col ) {
- if ( empty( $col->Collation ) ) {
- continue;
- }
- if ( ! in_array( $col->Collation, array( 'utf8_general_ci', 'utf8_bin', 'utf8mb4_general_ci', 'utf8mb4_bin' ), true ) ) {
- return false;
- }
- }
- return true;
- }
- /**
- * Strips any invalid characters based on value/charset pairs.
- *
- * @since 4.2.0
- *
- * @param array $data Array of value arrays. Each value array has the keys 'value' and 'charset'.
- * An optional 'ascii' key can be set to false to avoid redundant ASCII checks.
- * @return array|WP_Error The $data parameter, with invalid characters removed from each value.
- * This works as a passthrough: any additional keys such as 'field' are
- * retained in each value array. If we cannot remove invalid characters,
- * a WP_Error object is returned.
- */
- protected function strip_invalid_text( $data ) {
- $db_check_string = false;
- foreach ( $data as &$value ) {
- $charset = $value['charset'];
- if ( is_array( $value['length'] ) ) {
- $length = $value['length']['length'];
- $truncate_by_byte_length = 'byte' === $value['length']['type'];
- } else {
- $length = false;
- // Since we have no length, we'll never truncate. Initialize the variable to false.
- // True would take us through an unnecessary (for this case) codepath below.
- $truncate_by_byte_length = false;
- }
- // There's no charset to work with.
- if ( false === $charset ) {
- continue;
- }
- // Column isn't a string.
- if ( ! is_string( $value['value'] ) ) {
- continue;
- }
- $needs_validation = true;
- if (
- // latin1 can store any byte sequence.
- 'latin1' === $charset
- ||
- // ASCII is always OK.
- ( ! isset( $value['ascii'] ) && $this->check_ascii( $value['value'] ) )
- ) {
- $truncate_by_byte_length = true;
- $needs_validation = false;
- }
- if ( $truncate_by_byte_length ) {
- mbstring_binary_safe_encoding();
- if ( false !== $length && strlen( $value['value'] ) > $length ) {
- $value['value'] = substr( $value['value'], 0, $length );
- }
- reset_mbstring_encoding();
- if ( ! $needs_validation ) {
- continue;
- }
- }
- // utf8 can be handled by regex, which is a bunch faster than a DB lookup.
- if ( ( 'utf8' === $charset || 'utf8mb3' === $charset || 'utf8mb4' === $charset ) && function_exists( 'mb_strlen' ) ) {
- $regex = '/
- (
- (?: [\x00-\x7F] # single-byte sequences 0xxxxxxx
- | [\xC2-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx
- | \xE0[\xA0-\xBF][\x80-\xBF] # triple-byte sequences 1110xxxx 10xxxxxx * 2
- | [\xE1-\xEC][\x80-\xBF]{2}
- | \xED[\x80-\x9F][\x80-\xBF]
- | [\xEE-\xEF][\x80-\xBF]{2}';
- if ( 'utf8mb4' === $charset ) {
- $regex .= '
- | \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences 11110xxx 10xxxxxx * 3
- | [\xF1-\xF3][\x80-\xBF]{3}
- | \xF4[\x80-\x8F][\x80-\xBF]{2}
- ';
- }
- $regex .= '){1,40} # ...one or more times
- )
- | . # anything else
- /x';
- $value['value'] = preg_replace( $regex, '$1', $value['value'] );
- if ( false !== $length && mb_strlen( $value['value'], 'UTF-8' ) > $length ) {
- $value['value'] = mb_substr( $value['value'], 0, $length, 'UTF-8' );
- }
- continue;
- }
- // We couldn't use any local conversions, send it to the DB.
- $value['db'] = true;
- $db_check_string = true;
- }
- unset( $value ); // Remove by reference.
- if ( $db_check_string ) {
- $queries = array();
- foreach ( $data as $col => $value ) {
- if ( ! empty( $value['db'] ) ) {
- // We're going to need to truncate by characters or bytes, depending on the length value we have.
- if ( isset( $value['length']['type'] ) && 'byte' === $value['length']['type'] ) {
- // Using binary causes LEFT() to truncate by bytes.
- $charset = 'binary';
- } else {
- $charset = $value['charset'];
- }
- if ( $this->charset ) {
- $connection_charset = $this->charset;
- } else {
- if ( $this->use_mysqli ) {
- $connection_charset = mysqli_character_set_name( $this->dbh );
- } else {
- $connection_charset = mysql_client_encoding();
- }
- }
- if ( is_array( $value['length'] ) ) {
- $length = sprintf( '%.0f', $value['length']['length'] );
- $queries[ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING $charset ), $length ) USING $connection_charset )", $value['value'] );
- } elseif ( 'binary' !== $charset ) {
- // If we don't have a length, there's no need to convert binary - it will always return the same result.
- $queries[ $col ] = $this->prepare( "CONVERT( CONVERT( %s USING $charset ) USING $connection_charset )", $value['value'] );
- }
- unset( $data[ $col ]['db'] );
- }
- }
- $sql = array();
- foreach ( $queries as $column => $query ) {
- if ( ! $query ) {
- continue;
- }
- $sql[] = $query . " AS x_$column";
- }
- $this->check_current_query = false;
- $row = $this->get_row( 'SELECT ' . implode( ', ', $sql ), ARRAY_A );
- if ( ! $row ) {
- return new WP_Error( 'wpdb_strip_invalid_text_failure' );
- }
- foreach ( array_keys( $data ) as $column ) {
- if ( isset( $row[ "x_$column" ] ) ) {
- $data[ $column ]['value'] = $row[ "x_$column" ];
- }
- }
- }
- return $data;
- }
- /**
- * Strips any invalid characters from the query.
- *
- * @since 4.2.0
- *
- * @param string $query Query to convert.
- * @return string|WP_Error The converted query, or a WP_Error object if the conversion fails.
- */
- protected function strip_invalid_text_from_query( $query ) {
- // We don't need to check the collation for queries that don't read data.
- $trimmed_query = ltrim( $query, "\r\n\t (" );
- if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN|CREATE)\s/i', $trimmed_query ) ) {
- return $query;
- }
- $table = $this->get_table_from_query( $query );
- if ( $table ) {
- $charset = $this->get_table_charset( $table );
- if ( is_wp_error( $charset ) ) {
- return $charset;
- }
- // We can't reliably strip text from tables containing binary/blob columns.
- if ( 'binary' === $charset ) {
- return $query;
- }
- } else {
- $charset = $this->charset;
- }
- $data = array(
- 'value' => $query,
- 'charset' => $charset,
- 'ascii' => false,
- 'length' => false,
- );
- $data = $this->strip_invalid_text( array( $data ) );
- if ( is_wp_error( $data ) ) {
- return $data;
- }
- return $data[0]['value'];
- }
- /**
- * Strips any invalid characters from the string for a given table and column.
- *
- * @since 4.2.0
- *
- * @param string $table Table name.
- * @param string $column Column name.
- * @param string $value The text to check.
- * @return string|WP_Error The converted string, or a WP_Error object if the conversion fails.
- */
- public function strip_invalid_text_for_column( $table, $column, $value ) {
- if ( ! is_string( $value ) ) {
- return $value;
- }
- $charset = $this->get_col_charset( $table, $column );
- if ( ! $charset ) {
- // Not a string column.
- return $value;
- } elseif ( is_wp_error( $charset ) ) {
- // Bail on real errors.
- return $charset;
- }
- $data = array(
- $column => array(
- 'value' => $value,
- 'charset' => $charset,
- 'length' => $this->get_col_length( $table, $column ),
- ),
- );
- $data = $this->strip_invalid_text( $data );
- if ( is_wp_error( $data ) ) {
- return $data;
- }
- return $data[ $column ]['value'];
- }
- /**
- * Finds the first table name referenced in a query.
- *
- * @since 4.2.0
- *
- * @param string $query The query to search.
- * @return string|false $table The table name found, or false if a table couldn't be found.
- */
- protected function get_table_from_query( $query ) {
- // Remove characters that can legally trail the table name.
- $query = rtrim( $query, ';/-#' );
- // Allow (select...) union [...] style queries. Use the first query's table name.
- $query = ltrim( $query, "\r\n\t (" );
- // Strip everything between parentheses except nested selects.
- $query = preg_replace( '/\((?!\s*select)[^(]*?\)/is', '()', $query );
- // Quickly match most common queries.
- if ( preg_match(
- '/^\s*(?:'
- . 'SELECT.*?\s+FROM'
- . '|INSERT(?:\s+LOW_PRIORITY|\s+DELAYED|\s+HIGH_PRIORITY)?(?:\s+IGNORE)?(?:\s+INTO)?'
- . '|REPLACE(?:\s+LOW_PRIORITY|\s+DELAYED)?(?:\s+INTO)?'
- . '|UPDATE(?:\s+LOW_PRIORITY)?(?:\s+IGNORE)?'
- . '|DELETE(?:\s+LOW_PRIORITY|\s+QUICK|\s+IGNORE)*(?:.+?FROM)?'
- . ')\s+((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)/is',
- $query,
- $maybe
- ) ) {
- return str_replace( '`', '', $maybe[1] );
- }
- // SHOW TABLE STATUS and SHOW TABLES WHERE Name = 'wp_posts'
- if ( preg_match( '/^\s*SHOW\s+(?:TABLE\s+STATUS|(?:FULL\s+)?TABLES).+WHERE\s+Name\s*=\s*("|\')((?:[0-9a-zA-Z$_.-]|[\xC2-\xDF][\x80-\xBF])+)\\1/is', $query, $maybe ) ) {
- return $maybe[2];
- }
- /*
- * SHOW TABLE STATUS LIKE and SHOW TABLES LIKE 'wp\_123\_%'
- * This quoted LIKE operand seldom holds a full table name.
- * It is usually a pattern for matching a prefix so we just
- * strip the trailing % and unescape the _ to get 'wp_123_'
- * which drop-ins can use for routing these SQL statements.
- */
- if ( preg_match( '/^\s*SHOW\s+(?:TABLE\s+STATUS|(?:FULL\s+)?TABLES)\s+(?:WHERE\s+Name\s+)?LIKE\s*("|\')((?:[\\\\0-9a-zA-Z$_.-]|[\xC2-\xDF][\x80-\xBF])+)%?\\1/is', $query, $maybe ) ) {
- return str_replace( '\\_', '_', $maybe[2] );
- }
- // Big pattern for the rest of the table-related queries.
- if ( preg_match(
- '/^\s*(?:'
- . '(?:EXPLAIN\s+(?:EXTENDED\s+)?)?SELECT.*?\s+FROM'
- . '|DESCRIBE|DESC|EXPLAIN|HANDLER'
- . '|(?:LOCK|UNLOCK)\s+TABLE(?:S)?'
- . '|(?:RENAME|OPTIMIZE|BACKUP|RESTORE|CHECK|CHECKSUM|ANALYZE|REPAIR).*\s+TABLE'
- . '|TRUNCATE(?:\s+TABLE)?'
- . '|CREATE(?:\s+TEMPORARY)?\s+TABLE(?:\s+IF\s+NOT\s+EXISTS)?'
- . '|ALTER(?:\s+IGNORE)?\s+TABLE'
- . '|DROP\s+TABLE(?:\s+IF\s+EXISTS)?'
- . '|CREATE(?:\s+\w+)?\s+INDEX.*\s+ON'
- . '|DROP\s+INDEX.*\s+ON'
- . '|LOAD\s+DATA.*INFILE.*INTO\s+TABLE'
- . '|(?:GRANT|REVOKE).*ON\s+TABLE'
- . '|SHOW\s+(?:.*FROM|.*TABLE)'
- . ')\s+\(*\s*((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)\s*\)*/is',
- $query,
- $maybe
- ) ) {
- return str_replace( '`', '', $maybe[1] );
- }
- return false;
- }
- /**
- * Loads the column metadata from the last query.
- *
- * @since 3.5.0
- */
- protected function load_col_info() {
- if ( $this->col_info ) {
- return;
- }
- if ( $this->use_mysqli ) {
- $num_fields = mysqli_num_fields( $this->result );
- for ( $i = 0; $i < $num_fields; $i++ ) {
- $this->col_info[ $i ] = mysqli_fetch_field( $this->result );
- }
- } else {
- $num_fields = mysql_num_fields( $this->result );
- for ( $i = 0; $i < $num_fields; $i++ ) {
- $this->col_info[ $i ] = mysql_fetch_field( $this->result, $i );
- }
- }
- }
- /**
- * Retrieves column metadata from the last query.
- *
- * @since 0.71
- *
- * @param string $info_type Optional. Possible values include 'name', 'table', 'def', 'max_length',
- * 'not_null', 'primary_key', 'multiple_key', 'unique_key', 'numeric',
- * 'blob', 'type', 'unsigned', 'zerofill'. Default 'name'.
- * @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. Default -1.
- * @return mixed Column results.
- */
- public function get_col_info( $info_type = 'name', $col_offset = -1 ) {
- $this->load_col_info();
- if ( $this->col_info ) {
- if ( -1 == $col_offset ) {
- $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
- */
- public function timer_start() {
- $this->time_start = microtime( true );
- return true;
- }
- /**
- * Stops the debugging timer.
- *
- * @since 1.5.0
- *
- * @return float Total time spent on the query, in seconds.
- */
- public function timer_stop() {
- return ( microtime( true ) - $this->time_start );
- }
- /**
- * Wraps errors in a nice header and footer and dies.
- *
- * Will not die if wpdb::$show_errors is false.
- *
- * @since 1.5.0
- *
- * @param string $message The error message.
- * @param string $error_code Optional. A computer-readable string to identify the error.
- * Default '500'.
- * @return void|false Void if the showing of errors is enabled, false if disabled.
- */
- public function bail( $message, $error_code = '500' ) {
- if ( $this->show_errors ) {
- $error = '';
- if ( $this->use_mysqli ) {
- if ( $this->dbh instanceof mysqli ) {
- $error = mysqli_error( $this->dbh );
- } elseif ( mysqli_connect_errno() ) {
- $error = mysqli_connect_error();
- }
- } else {
- if ( is_resource( $this->dbh ) ) {
- $error = mysql_error( $this->dbh );
- } else {
- $error = mysql_error();
- }
- }
- if ( $error ) {
- $message = '<p><code>' . $error . "</code></p>\n" . $message;
- }
- wp_die( $message );
- } else {
- if ( class_exists( 'WP_Error', false ) ) {
- $this->error = new WP_Error( $error_code, $message );
- } else {
- $this->error = $message;
- }
- return false;
- }
- }
- /**
- * Closes the current database connection.
- *
- * @since 4.5.0
- *
- * @return bool True if the connection was successfully closed,
- * false if it wasn't, or if the connection doesn't exist.
- */
- public function close() {
- if ( ! $this->dbh ) {
- return false;
- }
- if ( $this->use_mysqli ) {
- $closed = mysqli_close( $this->dbh );
- } else {
- $closed = mysql_close( $this->dbh );
- }
- if ( $closed ) {
- $this->dbh = null;
- $this->ready = false;
- $this->has_connected = false;
- }
- return $closed;
- }
- /**
- * Determines whether MySQL database is at least the required minimum version.
- *
- * @since 2.5.0
- *
- * @global string $wp_version The WordPress version string.
- * @global string $required_mysql_version The required MySQL version string.
- * @return void|WP_Error
- */
- public function check_database_version() {
- global $wp_version, $required_mysql_version;
- // Make sure the server has the required MySQL version.
- if ( version_compare( $this->db_version(), $required_mysql_version, '<' ) ) {
- /* translators: 1: WordPress version number, 2: Minimum required MySQL version number. */
- return new WP_Error( 'database_version', sprintf( __( '<strong>Error</strong>: WordPress %1$s requires MySQL %2$s or higher' ), $wp_version, $required_mysql_version ) );
- }
- }
- /**
- * Determines whether the database supports collation.
- *
- * Called when WordPress is generating the table scheme.
- *
- * Use `wpdb::has_cap( 'collation' )`.
- *
- * @since 2.5.0
- * @deprecated 3.5.0 Use wpdb::has_cap()
- *
- * @return bool True if collation is supported, false if not.
- */
- public function supports_collation() {
- _deprecated_function( __FUNCTION__, '3.5.0', 'wpdb::has_cap( \'collation\' )' );
- return $this->has_cap( 'collation' );
- }
- /**
- * Retrieves the database character collate.
- *
- * @since 3.5.0
- *
- * @return string The database character collate.
- */
- public function get_charset_collate() {
- $charset_collate = '';
- if ( ! empty( $this->charset ) ) {
- $charset_collate = "DEFAULT CHARACTER SET $this->charset";
- }
- if ( ! empty( $this->collate ) ) {
- $charset_collate .= " COLLATE $this->collate";
- }
- return $charset_collate;
- }
- /**
- * Determines if a database supports a particular feature.
- *
- * @since 2.7.0
- * @since 4.1.0 Added support for the 'utf8mb4' feature.
- * @since 4.6.0 Added support for the 'utf8mb4_520' feature.
- *
- * @see wpdb::db_version()
- *
- * @param string $db_cap The feature to check for. Accepts 'collation', 'group_concat',
- * 'subqueries', 'set_charset', 'utf8mb4', or 'utf8mb4_520'.
- * @return int|false Whether the database feature is supported, false otherwise.
- */
- public function has_cap( $db_cap ) {
- $version = $this->db_version();
- switch ( strtolower( $db_cap ) ) {
- case 'collation': // @since 2.5.0
- case 'group_concat': // @since 2.7.0
- case 'subqueries': // @since 2.7.0
- return version_compare( $version, '4.1', '>=' );
- case 'set_charset':
- return version_compare( $version, '5.0.7', '>=' );
- case 'utf8mb4': // @since 4.1.0
- if ( version_compare( $version, '5.5.3', '<' ) ) {
- return false;
- }
- if ( $this->use_mysqli ) {
- $client_version = mysqli_get_client_info();
- } else {
- $client_version = mysql_get_client_info();
- }
- /*
- * libmysql has supported utf8mb4 since 5.5.3, same as the MySQL server.
- * mysqlnd has supported utf8mb4 since 5.0.9.
- */
- if ( false !== strpos( $client_version, 'mysqlnd' ) ) {
- $client_version = preg_replace( '/^\D+([\d.]+).*/', '$1', $client_version );
- return version_compare( $client_version, '5.0.9', '>=' );
- } else {
- return version_compare( $client_version, '5.5.3', '>=' );
- }
- case 'utf8mb4_520': // @since 4.6.0
- return version_compare( $version, '5.6', '>=' );
- }
- return false;
- }
- /**
- * Retrieves 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 Comma-separated list of the calling functions.
- */
- public function get_caller() {
- return wp_debug_backtrace_summary( __CLASS__ );
- }
- /**
- * Retrieves the MySQL server version.
- *
- * @since 2.7.0
- *
- * @return string|null Version number on success, null on failure.
- */
- public function db_version() {
- return preg_replace( '/[^0-9.].*/', '', $this->db_server_info() );
- }
- /**
- * Retrieves full MySQL server information.
- *
- * @since 5.5.0
- *
- * @return string|false Server info on success, false on failure.
- */
- public function db_server_info() {
- if ( $this->use_mysqli ) {
- $server_info = mysqli_get_server_info( $this->dbh );
- } else {
- $server_info = mysql_get_server_info( $this->dbh );
- }
- return $server_info;
- }
- }