PFinal\Wechat\Support\Cache::init PHP Method

    public static function init()
    {
        if (empty(self::$cache)) {
            $config = Kernel::getConfig('cache', array('class' => 'PFinal\\Cache\\FileCache', 'keyPrefix' => 'pfinal.wechat'));
            $class = $config['class'];
            unset($config['class']);
            self::$cache = new $class($config);
        }
    }