wp-includes/SimplePie/src/Cache/MySQL.php:90Create a new cache object
$locationstring$namestring$typeSimplePie\Cache\Base::TYPE_FEED|SimplePie\Cache\Base::TYPE_IMAGE public function __construct($location, $name, $type) { $this->options = [ 'user' => null, 'pass' => null, 'host' => '127.0.0.1', 'port' => '3306', 'path' => '', 'extras' => [ 'prefix' => '', 'cache_purge_time' => 2592000 ], ]; $this->options = array_replace_recursive($this->options, \SimplePie\Cache::parse_URL($location)); // Path is prefixed with a "/" $this->options['dbname'] = substr($this->options['path'], 1); try { $this->mysql = new \PDO("mysql:dbname={$this->options['dbname']};host={$this->options['host']};port={$this->options['port']}", $this->options['user'], $this->options['pass'], [\PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8']); } catch (\PDOException $e) { $this->mysql = null; return; } $this->id = $name . $type; if (!$query = $this->mysql->query('SHOW TABLES')) { $this->mysql = null; return; } $db = []; while ($row = $query->fetchColumn()) { $db[] = $row; } if (!in_array($this->options['extras']['prefix'] . 'cache_data', $db)) { $query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'cache_data` (`id` TEXT CHARACTER SET utf8 NOT NULL, `items` SMALLINT NOT NULL DEFAULT 0, `data` BLOB NOT NULL, `mtime` INT UNSIGNED NOT NULL, UNIQUE (`id`(125)))'); if ($query === false) { trigger_error("Can't create " . $this->options['extras']['prefix'] . "cache_data table, check permissions", \E_USER_WARNING); $this->mysql = null; return; } } if (!in_array($this->options['extras']['prefix'] . 'items', $db)) { $query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'items` (`feed_id` TEXT CHARACTER SET utf8 NOT NULL, `id` TEXT CHARACTER SET utf8 NOT NULL, `data` MEDIUMBLOB NOT NULL, `posted` INT UNSIGNED NOT NULL, INDEX `feed_id` (`feed_id`(125)))'); if ($query === false) { trigger_error("Can't create " . $this->options['extras']['prefix'] . "items table, check permissions", \E_USER_WARNING); $this->mysql = null; return; } } }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/SimplePie/src/Cache/MySQL.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.