public function __construct($config)
{
$this->appId = $config['appId'];
$this->appSecret = $config['appSecret'];
$this->mchId = isset($config['mchId']) ? $config['mchId'] : false;
$this->key = isset($config['key']) ? $config['key'] : false;
$this->get_access_token_diy = isset($config['get_access_token']) ? $config['get_access_token'] : false;
$this->save_access_token_diy = isset($config['save_access_token']) ? $config['save_access_token'] : false;
$this->get_jsapi_ticket_diy = isset($config['get_jsapi_ticket']) ? $config['get_jsapi_ticket'] : false;
$this->save_jsapi_ticket_diy = isset($config['save_jsapi_ticket']) ? $config['save_jsapi_ticket'] : false;
}