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| author | Charles Cabergs <me@cacharle.xyz> | 2020-07-27 10:05:23 +0200 |
|---|---|---|
| committer | Charles Cabergs <me@cacharle.xyz> | 2020-07-27 10:05:23 +0200 |
| commit | 5bf66662a9bdd62c5bccab15e607cd95cfb8fcab (patch) | |
| tree | 39a1a4629749056191c05dfd899f931701b7acf3 /srcs/wordpress/wp-includes/wp-db.php | |
| parent | 5afd237bbd22028b85532b8c0b3fcead49a00764 (diff) | |
| download | ft_server-master.tar.gz ft_server-master.tar.bz2 ft_server-master.zip | |
Removed wordpress and phpmyadmin, my server doesn't handle it well and it brings shame on my famillyHEADmaster
Diffstat (limited to 'srcs/wordpress/wp-includes/wp-db.php')
| -rw-r--r-- | srcs/wordpress/wp-includes/wp-db.php | 3625 |
1 files changed, 0 insertions, 3625 deletions
diff --git a/srcs/wordpress/wp-includes/wp-db.php b/srcs/wordpress/wp-includes/wp-db.php deleted file mode 100644 index 1be0412..0000000 --- a/srcs/wordpress/wp-includes/wp-db.php +++ /dev/null @@ -1,3625 +0,0 @@ -<?php -/** - * WordPress DB Class - * - * Original code from {@link http://php.justinvincent.com Justin Vincent (justin@visunet.ie)} - * - * @package WordPress - * @subpackage Database - * @since 0.71 - */ - -/** - * @since 0.71 - */ -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 Object - * - * 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://codex.wordpress.org/Function_Reference/wpdb_Class - * - * @since 0.71 - */ -class wpdb { - - /** - * Whether to show SQL/DB errors. - * - * Default behavior is to show errors if both WP_DEBUG and WP_DEBUG_DISPLAY - * evaluated to true. - * - * @since 0.71 - * @var bool - */ - var $show_errors = false; - - /** - * Whether to suppress errors during the DB bootstrapping. - * - * @since 2.5.0 - * @var bool - */ - var $suppress_errors = false; - - /** - * The last error during query. - * - * @since 2.5.0 - * @var string - */ - public $last_error = ''; - - /** - * Amount of queries made - * - * @since 1.2.0 - * @var int - */ - public $num_queries = 0; - - /** - * Count of rows returned by previous query - * - * @since 0.71 - * @var int - */ - public $num_rows = 0; - - /** - * Count of affected rows by previous query - * - * @since 0.71 - * @var int - */ - var $rows_affected = 0; - - /** - * The ID generated for an AUTO_INCREMENT column by the previous query (usually INSERT). - * - * @since 0.71 - * @var int - */ - public $insert_id = 0; - - /** - * Last query made - * - * @since 0.71 - * @var string - */ - var $last_query; - - /** - * Results of the last query made - * - * @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. - * - * @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. - * - * @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', - ); - - /** - * Whether to use mysqli over mysql. - * - * @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. - * - * @link https://core.trac.wordpress.org/ticket/3354 - * @since 2.0.8 - * - * @global string $wp_version - * - * @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 ) { - register_shutdown_function( array( $this, '__destruct' ) ); - - 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(); - } - - /** - * PHP5 style destructor and will run when database object is destroyed. - * - * @see wpdb::__construct() - * @since 2.0.8 - * @return true - */ - public function __destruct() { - return true; - } - - /** - * 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 ); - } - - /** - * Set $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. - */ - 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 ); - } - } - } - } - - /** - * Change the current SQL mode, and ensure 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. - */ - 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 ) ) { - 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. - * @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 $this->base_prefix; - } - } - - /** - * Returns an array of WordPress tables. - * - * Also allows for the CUSTOM_USER_TABLE and CUSTOM_USER_META_TABLE to - * override the WordPress users and usermeta tables that would otherwise - * be determined by the prefix. - * - * The scope argument can take one of the following: - * - * 'all' - returns 'all' and 'global' tables. No old tables are returned. - * 'blog' - returns the blog-level tables for the queried blog. - * 'global' - returns the global tables for the installation, returning multisite tables only if running multisite. - * 'ms_global' - returns the multisite global tables, regardless if current installation is multisite. - * 'old' - returns tables which are deprecated. - * - * @since 3.0.0 - * @uses wpdb::$tables - * @uses wpdb::$old_tables - * @uses wpdb::$global_tables - * @uses wpdb::$ms_global_tables - * - * @param string $scope Optional. Can be all, global, ms_global, blog, or old tables. Defaults to all. - * @param bool $prefix Optional. Whether to include table prefixes. Default true. If blog - * prefix is requested, then the custom users and usermeta tables will be mapped. - * @param int $blog_id Optional. The blog_id to prefix. Defaults to wpdb::$blogid. Used only when prefix is requested. - * @return array Table names. When a prefix is requested, the key is the unprefixed table name. - */ - public function tables( $scope = 'all', $prefix = true, $blog_id = 0 ) { - switch ( $scope ) { - case 'all': - $tables = array_merge( $this->global_tables, $this->tables ); - if ( is_multisite() ) { - $tables = array_merge( $tables, $this->ms_global_tables ); - } - break; - case 'blog': - $tables = $this->tables; - break; - case 'global': - $tables = $this->global_tables; - if ( is_multisite() ) { - $tables = array_merge( $tables, $this->ms_global_tables ); - } - break; - case 'ms_global': - $tables = $this->ms_global_tables; - break; - case 'old': - $tables = $this->old_tables; - break; - default: - return array(); - } - - if ( $prefix ) { - if ( ! $blog_id ) { - $blog_id = $this->blogid; - } - $blog_prefix = $this->get_blog_prefix( $blog_id ); - $base_prefix = $this->base_prefix; - $global_tables = array_merge( $this->global_tables, $this->ms_global_tables ); - foreach ( $tables as $k => $table ) { - if ( in_array( $table, $global_tables ) ) { - $tables[ $table ] = $base_prefix . $table; - } else { - $tables[ $table ] = $blog_prefix . $table; - } - unset( $tables[ $k ] ); - } - - if ( isset( $tables['users'] ) && defined( 'CUSTOM_USER_TABLE' ) ) { - $tables['users'] = CUSTOM_USER_TABLE; - } - - if ( isset( $tables['usermeta'] ) && defined( 'CUSTOM_USER_META_TABLE' ) ) { - $tables['usermeta'] = CUSTOM_USER_META_TABLE; - } - } - - return $tables; - } - - /** - * Selects a database using the current database connection. - * - * The database name will be changed based on the current database - * connection. On failure, the execution will bail and display an DB error. - * - * @since 0.71 - * - * @param string $db MySQL database name - * @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() - * - * @see mysqli_real_escape_string() - * @see mysql_real_escape_string() - * @since 2.8.0 - * - * @param string $string to escape - * @return string escaped - */ - 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 ); - } - - /** - * Escape data. Works on arrays. - * - * @uses wpdb::_real_escape() - * @since 2.8.0 - * - * @param string|array $data - * @return string|array escaped - */ - 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 mixed $data - * @return mixed - */ - 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 $string to escape - */ - public function escape_by_ref( &$string ) { - if ( ! is_float( $string ) ) { - $string = $this->_real_escape( $string ); - } - } - - /** - * Prepares a SQL query for safe execution. Uses sprintf()-like syntax. - * - * The following placeholders can be used in the query string: - * %d (integer) - * %f (float) - * %s (string) - * - * All placeholders MUST be left unquoted in the query string. A corresponding argument - * MUST be passed for each placeholder. - * - * For compatibility with old behavior, numbered or formatted string placeholders (eg, %1$s, %5s) - * will not have quotes added by this function, so should be passed with appropriate quotes around - * them for your usage. - * - * 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' ) ); - * $wpdb->prepare( "SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo' ); - * - * @link https://secure.php.net/sprintf Description of syntax. - * @since 2.3.0 - * @since 5.3.0 Formalized the existing and already documented `...$args` parameter - * by updating the function signature. The second parameter was changed - * from `$args` to `...$args`. - * - * @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 real_escape next. - */ - public function esc_like( $text ) { - return addcslashes( $text, '_%\\' ); - } - - /** - * Print SQL/DB error. - * - * @since 0.71 - * @global array $EZSQL_ERROR Stores error information of query and error string - * - * @param string $str The error to display - * @return false|void False if the showing of errors is 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 of errors. However, - * this function can be used to enable and disable showing of database - * errors. - * - * @since 0.71 - * @see wpdb::hide_errors() - * - * @param bool $show Whether to show or hide errors - * @return bool Old value for showing errors. - */ - 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 active - */ - public function hide_errors() { - $show = $this->show_errors; - $this->show_errors = false; - return $show; - } - - /** - * Whether to suppress database errors. - * - * By default database errors are suppressed, with a simple - * call to this function they can be enabled. - * - * @since 2.5.0 - * @see wpdb::hide_errors() - * @param bool $suppress Optional. New value. Defaults to true. - * @return bool Old value - */ - public function suppress_errors( $suppress = true ) { - $errors = $this->suppress_errors; - $this->suppress_errors = (bool) $suppress; - return $errors; - } - - /** - * Kill 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 ); - } - } - - /** - * Connect to and select 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; - } - - /** - * Parse 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|bool Array containing the host, the port, the socket and whether - * it is an IPv6 address, in that order. If $host couldn't be parsed, - * returns false. - */ - 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 ( $socket_pos !== false ) { - $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 after the - * 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(); - } - - /** - * Perform a MySQL database query, using current database connection. - * - * More information can be found on the codex page. - * - * @since 0.71 - * - * @param string $query Database query - * @return int|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 number of rows the query returned - // and return 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(), '%', $query ); - } - - /** - * Insert a row into a table. - * - * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 'bar' ) ) - * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) ) - * - * @since 2.5.0 - * @see wpdb::prepare() - * @see wpdb::$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, $format, 'INSERT' ); - } - - /** - * Replace a row into a table. - * - * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 'bar' ) ) - * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) ) - * - * @since 3.0.0 - * @see wpdb::prepare() - * @see wpdb::$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. What type of operation is this? INSERT or REPLACE. Defaults to 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' ) ) ) { - 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, $values ) ); - } - - /** - * Update a row in the table - * - * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 'bar' ), array( 'ID' => 1 ) ) - * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) ) - * - * @since 2.5.0 - * @see wpdb::prepare() - * @see wpdb::$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, $values ) ); - } - - /** - * Delete a row in the table - * - * wpdb::delete( 'table', array( 'ID' => 1 ) ) - * wpdb::delete( 'table', array( 'ID' => 1 ), array( '%d' ) ) - * - * @since 3.4.0 - * @see wpdb::prepare() - * @see wpdb::$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 $where will be treated as strings unless otherwise specified in wpdb::$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 Returns an array of fields that contain paired values - * and formats. Returns 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 - * the wpdb::process_field_formats() method. - * - * @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. - */ - 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, record 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; - } - - /** - * Retrieve one variable from the database. - * - * Executes a SQL query and returns the value from the SQL result. - * If the SQL result contains more than one column and/or more than one row, this function returns the value in the column and row specified. - * If $query is null, this function returns the value in the specified column and row from the previous SQL result. - * - * @since 0.71 - * - * @param string|null $query Optional. SQL query. Defaults to null, use the result from the previous query. - * @param int $x Optional. Column of value to return. Indexed from 0. - * @param int $y Optional. Row of value to return. Indexed from 0. - * @return string|null Database query result (as string), or null on failure - */ - 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 x,y vals - if ( ! empty( $this->last_result[ $y ] ) ) { - $values = array_values( get_object_vars( $this->last_result[ $y ] ) ); - } - - // If there is a value return it else return null - return ( isset( $values[ $x ] ) && $values[ $x ] !== '' ) ? $values[ $x ] : null; - } - - /** - * Retrieve one row from the database. - * - * Executes a SQL query and returns the row from the SQL result. - * - * @since 0.71 - * - * @param string|null $query SQL query. - * @param string $output Optional. The required return type. One of 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 ( $output == OBJECT ) { - return $this->last_result[ $y ] ? $this->last_result[ $y ] : null; - } elseif ( $output == ARRAY_A ) { - return $this->last_result[ $y ] ? get_object_vars( $this->last_result[ $y ] ) : null; - } elseif ( $output == ARRAY_N ) { - return $this->last_result[ $y ] ? array_values( get_object_vars( $this->last_result[ $y ] ) ) : null; - } elseif ( strtoupper( $output ) === OBJECT ) { - // Back compat for OBJECT being previously case insensitive. - return $this->last_result[ $y ] ? $this->last_result[ $y ] : null; - } else { - $this->print_error( ' $db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N' ); - } - } - - /** - * Retrieve one column from the database. - * - * Executes a SQL query and returns the column from the SQL result. - * If the SQL result contains more than one column, this function returns the column specified. - * If $query is null, this function returns the specified column from the previous SQL result. - * - * @since 0.71 - * - * @param string|null $query Optional. SQL query. Defaults to previous query. - * @param int $x Optional. Column to return. Indexed from 0. - * @return array Database query result. Array indexed from 0 by SQL result row number. - */ - 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; - } - - /** - * Retrieve an entire SQL result set from the database (i.e., many rows) - * - * Executes a SQL query and returns the entire SQL result. - * - * @since 0.71 - * - * @param string $query SQL query. - * @param string $output Optional. Any of ARRAY_A | ARRAY_N | OBJECT | OBJECT_K constants. - * With one of the first three, return an array of rows indexed from 0 by SQL result row number. - * Each row is an associative array (column => value, ...), a numerically indexed array (0 => value, ...), or an object. ( ->column = value ), respectively. - * With OBJECT_K, return an associative array of row objects keyed by the value of each row's first column's value. - * Duplicate keys are discarded. - * @return 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 ( $output == OBJECT ) { - // Return an integer-keyed array of row objects - return $this->last_result; - } elseif ( $output == OBJECT_K ) { - // Return an array of row objects with keys from column 1 - // (Duplicates are discarded) - 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 ( $output == ARRAY_A || $output == ARRAY_N ) { - // Return an integer-keyed array of... - if ( $this->last_result ) { - foreach ( (array) $this->last_result as $row ) { - if ( $output == ARRAY_N ) { - // ...integer-keyed row arrays - $new_array[] = array_values( get_object_vars( $row ) ); - } else { - // ...column name-keyed row arrays - $new_array[] = get_object_vars( $row ); - } - } - } - return $new_array; - } elseif ( strtoupper( $output ) === OBJECT ) { - // Back compat for OBJECT being previously case insensitive. - return $this->last_result; - } - return null; - } - - /** - * 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' ) ) ) { - $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; - } - - /** - * Retrieve 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; - } - } - - /** - * Check 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; - } - - /** - * Check 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']; - } - - /** - * Find 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; - } - - /** - * Load 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 ); - } - } - } - - /** - * Retrieve column metadata from the last query. - * - * @since 0.71 - * - * @param string $info_type Optional. Type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill - * @param int $col_offset Optional. 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type - * @return mixed Column Results - */ - public function get_col_info( $info_type = 'name', $col_offset = -1 ) { - $this->load_col_info(); - - if ( $this->col_info ) { - if ( $col_offset == -1 ) { - $i = 0; - $new_array = array(); - foreach ( (array) $this->col_info as $col ) { - $new_array[ $i ] = $col->{$info_type}; - $i++; - } - return $new_array; - } else { - return $this->col_info[ $col_offset ]->{$info_type}; - } - } - } - - /** - * 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. - * @return false|void - */ - 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 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; - } - - /** - * Whether MySQL database is at least the required minimum version. - * - * @since 2.5.0 - * - * @global string $wp_version - * @global string $required_mysql_version - * - * @return WP_Error|void - */ - 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 ) ); - } - } - - /** - * 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 version does not - */ - public function supports_collation() { - _deprecated_function( __FUNCTION__, '3.5.0', 'wpdb::has_cap( \'collation\' )' ); - return $this->has_cap( 'collation' ); - } - - /** - * 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; - } - - /** - * Determine 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; - } - - /** - * Retrieve the name of the function that called wpdb. - * - * Searches up the list of functions until it reaches - * the one that would most logically had called this method. - * - * @since 2.5.0 - * - * @return string 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 null|string Null on failure, version number on success. - */ - public function db_version() { - if ( $this->use_mysqli ) { - $server_info = mysqli_get_server_info( $this->dbh ); - } else { - $server_info = mysql_get_server_info( $this->dbh ); - } - return preg_replace( '/[^0-9.].*/', '', $server_info ); - } -} |