PHP redis 订阅发布 订阅不成功问题！

    $redis = new Redis();      $redis->connect("127.0.0.1","6379");     $redis->publish('tv1', '22222222'); //发布

       $channel = 'tv1';  // channel	$redis->subscribe(array('channel'.$channel), 'callback');	function callback($redis, $channel, $message) {	  var_dump($message);	  exit;	}

    $channel = 'tv1';  // channel    $redis->subscribe(array($channel), 'callback');    function callback($redis, $channel, $message) {      var_dump($message);      exit;    }