public static function model()
{
if (self::$_model === null) {
self::$_model = new WeiXin();
$config_wx = H::app()->getConfig('weixin');
self::$_model->_token = $config_wx['token'];
self::$_model->_app_id = $config_wx['app_id'];
self::$_model->_app_secret = $config_wx['app_secret'];
}
return self::$_model;
}
