}
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();
}
