iphone – Apns php错误“无法连接到APNS：110连接超时.”

和设置证书从this link

用于向ios设备发送通知的沙箱和生产apns在我的服务器上运行完美.我将代码和相同的证书移动到客户端服务器,然后发送通知不起作用.

我调试所有的PHP代码,发现它停在这行代码

private function _connectSSLSocket($development) {
    $ctx = stream_context_create();
    stream_context_set_option($ctx,'ssl','local_cert',$this->apnsData[$development]['certificate']);
    $this->sslStreams[$development] = stream_socket_client($this->apnsData[$development]['ssl'],$error,$errorString,100,(STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT),$ctX);
    if(!$this->sslStreams[$development]){
        $this->_triggerError("Failed to connect to APNS: {$error} {$errorString}.");
        unset($this->sslStreams[$development]);
        return false;
    }
    return $this->sslStreams[$development];
}

apns.log文件显示错误“无法连接到APNS：110连接超时”.

没有弄错.为什么我会收到此错误而不向ios设备发送通知？任何人都可以指导我吗？