php 实现redis发布订阅消息及时通讯

<?php  
//发布  
$redis = new Redis();  
$redis->connect('127.0.0.1', 6379);  
$message='新年快乐';  
$ret=$redis->publish('中央广播电台',$message);  

<?php  
//订阅  
ini_set('default_socket_timeout', -1);  //不超时  
$redis = new Redis();  
$redis->connect('127.0.0.1', 6379);  
$result=$redis->subscribe(array('中央广播电台'), 'callback');  
function callback($instance,$channelName,$message){  
    echo $message;  
}