php try catch异常处理结构

try {
    // if(!empty($UserCode)){
    $url = '';
    $client = new \SoapClient($url);
    $userLogin = new \stdClass();

    $userLogin->UserCode = $UserCode;
    $userLogin->ExpirDate = 2;

    $loginResponse = $client->__call("GetToken", array(
        $userLogin
    ));
    $token = $loginResponse->GetTokenResult;
}catch(\Exception $e) {  //千万要注意这里的 \  很重要！！！否则不执行这里来
    $token = '';
}