php扩展yar运行测试用例出错?报错

server端php代码 l_server.php：

<?php

class API {

    /**
     * the doc info will be generated automatically into service info page.
     * @params
     * @return
     */
   public function cwh($parameter = "", $option = "foo") {
          return $this->client_can_not_see($parameter);
    }
    protected function client_can_not_see( $name ) {
      return "你好$name~";
    }
}

$service = new Yar_Server(new API());
//var_dump($service);
$service->handle();
?>

<?php
$client = new Yar_Client("http://127.0.0.1/l_server.php");
$client->SetOpt(YAR_OPT_CONNECT_TIMEOUT, 1);
var_dump($client);
  $result = $client->cwh("xiaohui");
  var_dump($result);exit;
?>

PHP Fatal error:  Uncaught exception 'Yar_Client_Protocol_Exception' with message 'malformed response header '

系统是centos6.4  64位 ，开始以为是安装有误，可安装了几次都这样的，不知谁用过的能否指点下？