php调用java web服务获取内部服务器错误500

Question

i had a java web service and a php client in local host.. i use php to call java web service buy this come out internal server error 500. any wrong from the code

private function getWebService() {
    $ws = 'http://localhost:8080/Pineaaplews/services/PineappleHellow?wsdl';
     $options = array('features' => SOAP_USE_XSI_ARRAY_TYPE + SOAP_SINGLE_ELEMENT_ARRAYS);
    $client = new SoapClient($ws,$options);
    $response = $client->addMethod(2,3);
    $this->response = array('testStr' => $response);
}