swoole_client定时发送心跳包

swoole_timer模块提供了异步毫秒定时器，可用于心跳包发送。

$client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC); //异步非阻塞$client->on("connect", function(swoole_client $cli){});$client->on("receive", function(swoole_client $cli, $data){});$client->on("error", function(swoole_client $cli){});$client->on("close", function(swoole_client $cli){});$client->connect('127.0.0.1', 5001);swoole_timer_add(150000, function () use ($client) {      $client->send('beatheart');});

150秒发送一次心跳包。