websocket-php简易聊天（保持网页数据通讯）

说明

需要安装 swoole扩展

在linux系统下通过命令行执行php文件。（win下没有swoole扩展）

示例代码

1. 前端websocket


<html>
<head>
    <meta charset="UTF-8">
    <title>Web sockets test</title>
    <script type="text/javascript">
        var ws;
        function ToggleConnectionClicked() {   
            if( typeof(ws) != 'undefined' && ws.readyState == 1 ) {
                alert('已连接服务器，请勿重复连接！');
                return false;
            }

            try {
                ws = new WebSocket("ws://192.168.198.221:9501");//连接服务器,改成你服务器地址
                ws.onopen = function(event){
                    alert("已经与服务器建立了连接\r\n当前连接状态："+this.readyState);
                };
                ws.onmessage = function(event){
                    // alert("接收到服务器发送的数据：\r\n"+event.data);
                    var chat_content = document.getElementById("chat_content");
                    chat_content.innerHTML = chat_content.innerHTML+event.data+"<br />";
                    // console.log(event.data);
                };
                ws.onclose = function(event){
                    alert("已经与服务器断开连接\r\n当前连接状态："+this.readyState);
                };
                ws.onerror = function(event){
                    alert("WebSocket异常！");
                };
            } catch (ex) {
                alert(ex.message);      
            }
        };
 
        function SendData() {
            try{
                var content = document.getElementById("content").value;
                if(content){
                    ws.send(content);
                }
                
            }catch(ex){
                alert(ex.message);
            }
        };
 
        function seestate(){
            if( typeof(ws) == 'undefined' ) {
                alert('还未连接服务器！');
                return false;
            }
            alert(ws.readyState);
        };

        function ClearChatContent(){
            document.getElementById("chat_content").innerHTML = "";
        };
    </script>
</head>
<body>
    <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />
    <textarea id="content" ></textarea>
    <button id='ToggleConnection' type="button" onclick='SendData();'>发送</button><br /><br />
    <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
    <button type="button" onclick='ClearChatContent();'>清屏</button><br /><br />
    <div id="chat_content"></div>
</body>
</html>

2. 后台php代码

<?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", 9501);
 
# 监听WebSocket连接打开事件
$ws->on('open', function ($ws, $request) {
    // var_dump($request->fd, $request->get, $request->server);
    echo $request->server['remote_addr']."已连接\n";
    $ws->push($request->fd, "hello, welcome.your ip is {$request->server['remote_addr']}\n");
 
    # 广播
    foreach($ws->connections as $fd) {
        $ws->push($fd, "用户{$request->fd}已登录聊天");
    }
});
 
# 监听WebSocket消息事件
$ws->on('message', function (swoole_websocket_server $server, $frame) {
    echo $frame->fd." Message: {$frame->data}\n";
    # 广播
    foreach($server->connections as $fd) {
        $server->push($fd, "用户{$frame->fd}说: {$frame->data}");
    }
 
});
 
# 监听WebSocket连接关闭事件
$ws->on('close', function ($ws, $fd) {
    # var_dump($ws, $fd);
    echo "client-{$fd} is closed\n";
});
 
$ws->start();