php+swoole+websocket

//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) {
    $fd[] = $request->fd;
    $GLOBALS['fd'][] = $fd;
    //$ws->push($request->fd, "hello, welcome\n");
});

//监听WebSocket消息事件
$ws->on('message', function ($ws, $frame) {
    $msg =  'from'.$frame->fd.":{$frame->data}\n";
//var_dump($GLOBALS['fd']);
//exit;
    foreach($GLOBALS['fd'] as $aa){
        foreach($aa as $i){
            $ws->push($i,$msg);
        }
    }
   // $ws->push($frame->fd, "server: {$frame->data}");
    // $ws->push($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();

　　

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="msg"></div>
<input type="text" id="text">
<input type="submit" value="发送数据" onclick="song()">
</body>
<script>
    var msg = document.getElementById("msg");
    var wsServer = 'ws://192.168.1.253:9502';
    //调用websocket对象建立连接：
    //参数：ws/wss(加密)：//ip:port （字符串）
    var websocket = new WebSocket(wsServer);
    //onopen监听连接打开
    websocket.onopen = function (evt) {
        //websocket.readyState 属性：
        /*
        CONNECTING    0    The connection is not yet open.
        OPEN    1    The connection is open and ready to communicate.
        CLOSING    2    The connection is in the process of closing.
        CLOSED    3    The connection is closed or couldn't be opened.
        */
        msg.innerHTML = websocket.readyState;
    };

    function song(){
        var text = document.getElementById('text').value;
        document.getElementById('text').value = '';
        //向服务器发送数据
        websocket.send(text);
    }
      //监听连接关闭
//    websocket.onclose = function (evt) {
//        console.log("Disconnected");
//    };

    //onmessage 监听服务器数据推送
    websocket.onmessage = function (evt) {
        msg.innerHTML += evt.data +'<br>';
//        console.log('Retrieved data from server: ' + evt.data);
    };
//监听连接错误信息
//    websocket.onerror = function (evt, e) {
//        console.log('Error occured: ' + evt.data);
//    };

</script>
</html>

　　

websocket API 手册：
https://developer.mozilla.org/en-US/docs/Web/API/WebSocket