} if (!defined('W3TC_DIR')) { define('W3TC_DIR', (defined('WP_PLUGIN_DIR') ? WP_PLUGIN_DIR : WP_CONTENT_DIR . '/plugins') . '/w3-total-cache'); } /** * Abort W3TC loading if WordPress is upgrading */ if (!@is_dir(W3TC_DIR) || !file_exists(W3TC_DIR . '/w3-total-cache-api.php')) { if (!defined('WP_ADMIN')) { // lets don't show error on front end require_once ABSPATH . WPINC . '/wp-db.php'; } else { echo sprintf('<strong>W3 Total Cache Error:</strong> some files appear to be missing or out of place. Please re-install plugin or remove <strong>%s</strong>. <br />', __FILE__); } } else { require_once W3TC_DIR . '/w3-total-cache-api.php'; // no caching during activation $is_installing = defined('WP_INSTALLING') && WP_INSTALLING; $config = \W3TC\Dispatcher::config(); if (!$is_installing && $config->get_boolean('dbcache.enabled') || \W3TC\Util_Environment::is_dbcluster()) { if (defined('DB_TYPE')) { $db_driver_path = sprintf('%s/Db/%s.php', W3TC_LIB_DIR, DB_TYPE); if (file_exists($db_driver_path)) { require_once $db_driver_path; } else { die(sprintf('<strong>W3 Total Cache Error:</strong> database driver doesn\'t exist: %s.', $db_driver_path)); } } $GLOBALS['wpdb'] = \W3TC\DbCache_Wpdb::instance(); } }
public static function instance() { return \W3TC\DbCache_Wpdb::instance(); }