先要为php安装 swoole.so 模块：
wget https://github.com/swoole/swoole-src/archive/v1.9.1-stable.tar.gztar -xf v1.9.1-stable.tar.gz cd swoole-src-1.9.1-stable/ phpize ./configure --with-php-config=/usr/bin/php-config make make install ll /usr/lib64/php/modules/ php -m | grep swoole vim /etc/php.ini extension=swoole.so
示例文档：
https://wiki.swoole.com/wiki/page/479.html
js：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body>
<button onclick="send()">send message</button>
<script>
var wsServer = 'ws://10.3.149.85:9502';
var websocket = new WebSocket(wsServer);
websocket.onopen = function (evt) {
console.log("Connected to WebSocket server.");
};
websocket.onclose = function (evt) {
console.log("Disconnected");
};
// 当有消息从后端发过来就会自动执行此函数
websocket.onmessage = function (evt) {
console.log(evt);
console.log('Retrieved data from server: ' + evt.data);
};
websocket.onerror = function (evt, e) {
console.log('Error occured: ' + evt.data);
};
function send(){
websocket.send("send message");
}
</script>
</body>
</html>php：
<?php
//创建websocket服务器对象，监听0.0.0.0:9502端口
$ws = new swoole_websocket_server("0.0.0.0", 9502);
//监听WebSocket连接打开事件
$ws->on('open', function ($ws, $request) {
var_dump($request->fd, $request->get, $request->server);
$ws->push($request->fd, "hello, welcome\n");
});
//监听WebSocket消息事件，接收到客户端发来的消息怎么处理
$ws->on('message', function ($ws, $frame) {
echo "Message: {$frame->data}\n";
$ws->push($frame->fd, "server: {$frame->data}");
});
//监听WebSocket连接关闭事件
$ws->on('close', function ($ws, $fd) {
echo "client-{$fd} is closed\n";
});
$ws->start();