php做ios推送的服务器，后台运行的时候会推送两条信息？有代码

<code> /**手机推送信息类@author：wtt*/class Push{    private $deviceToken;    private $message;    function __construct($deviceToken,$message){         $this->deviceToken = $deviceToken;         $this->message = $message;     }    public function push(){        //ck.pem通关密码          $pass = '123456';             //消息内容           //badge我也不知是什么          $badge = 1;          //sound我也不知是什么（或许是推送消息到手机时的提示音）          $sound = 'Duck.wav';          //建设的通知有效载荷（即通知包含的一些信息）          $body = array();          $body['aps'] = array('alert' => $this->message);          if ($badge)            $body['aps']['badge'] = $badge;          if ($sound)            $body['aps']['sound'] = $sound;          //把数组数据转换为json数据          $payload = json_encode($body);          //echo strlen($payload),"\r\n";           //下边的写法就是死写法了，一般不需要修改，          //唯一要修改的就是：ssl://gateway.sandbox.push.apple.com:2195这个是沙盒测试地址，ssl://gateway.push.apple.com:2195正式发布地址          $ctx = stream_context_create();          stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem');            stream_context_set_option($ctx, 'ssl', 'passphrase', $pass);          $fp = stream_socket_client('ssl://gateway.sandbox.push.apple.com:2195', $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx);          if (!$fp) {              print "Failed to connect {$err} {$errstr}\n";              return;          }          else {            // print "Connection OK\n<br/>";          }          // send message          $msg = chr(0) . pack("n",32) . pack('H*', str_replace(' ', '', $this->deviceToken)) . pack("n",strlen($payload)) . $payload;          //print "Sending message :" . $payload . "\n";            fwrite($fp, $msg);          fclose($fp);    }} </code>