客戶端連結後： 每隔2s詢問客戶是否線上 客戶端傳送訊息5s後 給出一個回饋

<?php
/*
常規定時器:
	crontab

swoole定時器
	swoole_timer_tick
	swoole_timer_after

	 

*/

$server = new swoole_websocket_server("0.0.0.0",8812);
//監聽websocket連線開啟事件
$server->on('open','onOpen');
function onOpen($server,$request){
	print_r($request->fd);

	swoole_timer_tick(2000,function($time_id)use($server,$request){
	//	echo "2s:timerId:{$time_id}\n";i
		$server->push($request->fd,$time_id."ask：Are you Onlie?");
	});
}
/*
$server->on('open', function (swoole_websocket_server $server, $request) {
    echo "server: handshake success with fd{$request->fd}\n";
});
*/

//訊息事件
$server->on('message', function (swoole_websocket_server $server, $frame) {
	echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
	$server->push($frame->fd, "this is server sucess:".$frame->data);//把資料push到客戶端 推送資料
	swoole_timer_after(5000,function()use($server,$frame){
		echo "5s-after\n";
		$server->push($frame->fd,"server-time\n");
	});
});

//客戶端關閉事件
$server->on('close', function ($ser, $fd) {
    echo "client {$fd} closed\n";
});

$server->start();