$pusher->apiListen = "http://0.0.0.0:$api_port";

$pusher->appInfo = array(

    $app_key => array(

        'channel_hook' => "{$domain}/admin/event",

        'app_secret'   => $app_secret,

    ),

);

一直提示标点符号错了，各位大神，应该怎么修改啊