``` php
<?php
$server = new swoole_websocket_server("0.0.0.0", 9501);
$server->set(array(
'daemonize' => false,
'worker_num' => 2,
));
$server->on('Start', function (swoole_websocket_server $server) {
echo "Server Start... \n";
swoole_set_process_name("swoole_websocket_server");
});
$server->on('ManagerStart', function (swoole_websocket_server $server) {
echo "ManagerStart\n";
});
$server->on('WorkerStart', function (swoole_websocket_server $server, $worker_id) {
echo "WorkerStart \n";
if ($server->worker_id == 0){
swoole_timer_tick(10000,function($id) use ($server) {
echo "test timer\n";
});
}
});
$server->on('Open', function (swoole_websocket_server $server, $request) {
echo "server: handshake success with fd{$request->fd}\n";
});
$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");
});
$server->on('Close', function ($ser, $fd) {
echo "client {$fd} closed\n";
});
$server->start();
```
shell里直接运行`php swoole_ws_server.php`启动即可。如果设置了后台运行，可以使用下列命令强杀进程：
```
kill -9 $(ps aux|grep swoole|grep -v grep|awk '{print $2}')
```
或者重新启动worker进程：
```
kill -10 $(ps aux|grep swoole_websocket_server|grep -v grep|awk '{print $2}')
```
输出：
```
[2017-06-01 22:06:21 $2479.0] NOTICE Server is reloading now.
WorkerStart
WorkerStart
```
注意：
- onMessage回调函数为必选，当服务器收到来自客户端的数据帧时会回调此函数。
```
/**
* @param $server
* @param $frame 包含了客户端发来的数据帧信息；使用$frame->fd获取fd；$frame->data获取数据内容
*/
function onMessage(swoole_server $server, swoole_websocket_frame $frame)
```
- 使用`$server->push()`向客户端发送消息。长度最大不得超过2M。发送成功返回true，发送失败返回false。
```
function swoole_websocket_server->push(int $fd, string $data, int $opcode = 1, bool $finish = true);
```
