php安装swoole

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下载swoole安装
```
 pecl install swoole
```
在php.ini添加swoole.so
```
 extension=swoole.so
```
聊天功能

PHP原生写法

<?php
function on_open(swoole_websocket_server $server, $request)
{
   //客户端已经连接
}
function on_close($server, $fd)
{
   //客户端已经断开
}
function on_message(swoole_websocket_server $server, $request)
{
    $data = $request->data;
    foreach ($server->connections as $fd) {
        //消息发送者客户端id：$request->fd
        //消息接收者客户端id：$fd
        $server->push($fd, $data);
    }
}
$server = new swoole_websocket_server("0.0.0.0", 1234);
$server->on('open', 'on_open');
$server->on('close', 'on_close');
$server->on('message', 'on_message');
$server->start();

PHP匿名函数(闭包)写法

<?php
$server = new swoole_websocket_server("0.0.0.0", 1234);
$server->on('open', function (swoole_websocket_server $server, $request) {
   //客户端已经连接
});
$server->on('close', function ($server, $fd) {
   //客户端已经断开
});
$server->on('message', function (swoole_websocket_server $server, $request) {
    $data = $request->data;
    foreach ($server->connections as $fd) {
        $server->push($fd, $data);
    }
});
$server->start();

PHP面向对象写法

<?php
class SwooleServer
{
    public function onOpen(swoole_websocket_server $server, $request)
    {
        //客户端已经连接
    }
    public function onClose($server, $fd)
    {
        //客户端已经断开
    }
    public function onMessage(swoole_websocket_server $server, $request)
    {
        $data = $request->data;
        foreach ($server->connections as $fd) {
            $server->push($fd, $data);
        }
    }
}
$swoole_server = new SwooleServer();
$server = new swoole_websocket_server("0.0.0.0", 1234);
$server->on('open', array($swoole_server, 'onOpen'));
$server->on('close', array($swoole_server, 'onClose'));
$server->on('message', array($swoole_server, 'onMessage'));
$server->start();

PHP守护进程写法(支持ssl安全传输，支持守护进程启动)

#!/usr/local/php7/bin/php
<?php
//打印帮助信息
$help = <<<EOF
帮助信息：
    --port     swoole对外开放的端口
    --host     swoole对外开放的地址
    --ssl      是否用ssl传输加密
    --cert     ssl公钥文件的路径
    --key      ssl私钥文件的路径
    --daemon   以守护进程运行脚本
    --help     打印脚本的帮助信息\n
EOF;
//检查扩展安装
if (!extension_loaded('pcntl')) {
    exit("请安装pcntl扩展\n");
}
if (!extension_loaded('swoole')) {
    exit("请安装swoole扩展\n");
}
//处理传入参数
$opt = getopt('', ["port::", "host::", "ssl::", "cert::", "key::", "daemon::", "help::"]);
if (isset($opt['help'])) {
    exit($help);
}
try {
    $opt = [
        'port' => !empty($opt['port']) ? $opt['port'] : (isset($opt['ssl']) ? 444 : 88),
        'host' => !empty($opt['host']) ? $opt['host'] : '0.0.0.0',
        'ssl' => isset($opt['ssl']) ? 'y' : 'n',
        'cert' => !empty($opt['cert']) ? $opt['cert'] : null,
        'key' => !empty($opt['key']) ? $opt['key'] : null,
        'daemon' => isset($opt['daemon']) ? 'y' : 'n',
    ];
    if ($opt['ssl'] === 'y') {
        //外部封装安全传输协议
        $server = new swoole_websocket_server($opt['host'], $opt['port'], SWOOLE_PROCESS, SWOOLE_SOCK_TCP | SWOOLE_SSL);
        $server->set(['ssl_key_file' => $opt['key'], 'ssl_cert_file' => $opt['cert']]);
    } else {
        //外部不封装安全传输协议
        $server = new swoole_websocket_server($opt['host'], $opt['port'], SWOOLE_PROCESS, SWOOLE_SOCK_TCP);
    }
    $server->on('open', function (swoole_websocket_server $server, $request) {
        //客户端已经连接
    });
    $server->on('close', function ($server, $fd) {
        //客户端已经断开
    });
    $server->on('message', function (swoole_websocket_server $server, $request) {
        //客户端发来消息
        $data = $request->data;
        foreach ($server->connections as $fd) {
            $fd_status = $server->connection_info($fd);
            if (isset($fd_status['websocket_status']) && $fd_status['websocket_status'] == 3) {
                //客户端是握手成功等待数据帧
                $server->push($fd, $data);
            }
            unset($fd_status);
        }
    });
    if ($opt['daemon'] === 'y') {
        //以守护进程启动
        $pid = pcntl_fork();
        if ($pid < 0) {
            exit(0);
        } elseif ($pid > 0) {
            exit(0);
        }
        $sid = posix_setsid();
        if ($sid == -1) {
            exit(0);
        } else {
            $server->start();
        }
    } else {
        //以普通进程启动
        $server->start();
    }
} catch (\Exception $e) {
    exit($help);
}

聊天功能，html文件

 <!DOCTYPE html>
 <html>
 <head>
     <title>聊天</title>
     <meta charset="UTF-8">
     <script type="text/javascript">
         let str = '';
         let socketTalk = new WebSocket("ws://[ip]:1234");
         socketTalk.onmessage = function (event) {
             str = str + '<p>' + event.data + '</p>';
             console.log(event.data);
             document.getElementById("talk").innerHTML = str;
         }
     </script>
 </head>
 <body>
 <input type="text" id="content">
 <button onclick="socketTalk.send( document.getElementById('content').value )">发送</button>
 <div id="talk"></div>
 </body>
 </html>

游戏功能，html文件(3D联网游戏，以平面逻辑说明)

 <!DOCTYPE html>
 <html>
 <head>
     <title>Move</title>
     <meta charset="UTF-8">
     <style>
         /*默认样式*/
         * {
             margin: 0;
             padding: 0
         }
         /*用户盒子*/
         #box {
             width: 100%;
             height: 100%;
         }
         /*用户数据*/
         .user {
             position: fixed;
             top: 0;
             left: 0;
             width: 4rem;
             height: 4rem;
             background-color: rgba(0, 0, 0, 0.3);
         }
     </style>
 </head>
 <body>
 <div id="box"></div>
 <script>
     //分配用户id(可以通过别的逻辑声明用户id)
     let user_id = window.localStorage.getItem('user_id') ? window.localStorage.getItem('user_id') : Date.now();
     window.localStorage.setItem('user_id', user_id);
     //创建我的节点
     let user = document.createElement("div");
     user.setAttribute("class", "user");
     user.setAttribute("id", user_id);
     let x = Math.ceil(Math.random() * 600);
     let y = Math.ceil(Math.random() * 600);
     user.style.left = x + "px";
     user.style.top = y + "px";
     user.style.backgroundColor = "#ff0";
     let box = document.getElementById("box");
     box.appendChild(user);
     //消息处理
     let msg = new WebSocket("ws://[server]:[port]");
     msg.onopen = function (event) {
         document.getElementById(user_id).style.backgroundColor = "#ff0";//自己是黄色，别人是灰色
         document.getElementById(user_id).style.left = x + "px";
         document.getElementById(user_id).style.top = y + "px";
         //告诉其他用户我的动作
         let obj = {
             "user_id": user_id,//用户标识
             "say": "",//用户说话
             "move": {//移动数据
                 "x": x,//横向位移
                 "y": y,//纵向位移
                 "z": 0,//高度位移
                 "t": 0,//仰角大小(相对正北)
                 "r": 0,//转角大小(相对正北)
             }
         };
         msg.send(JSON.stringify(obj));
     };
     msg.onmessage = function (event) {
         //收到请求，解析请求
         let action = JSON.parse(event.data);
         //请求类型，用户move
         if (action.user_id && action.user_id != user_id) {
             if (document.getElementById(action.user_id)) {
                 //他人节点已存在，直接做移动
                 document.getElementById(action.user_id).style.left = action.move.x + "px";
                 document.getElementById(action.user_id).style.top = action.move.y + "px";
             } else {
                 //他人节点不存在，创建并移动
                 let user = document.createElement("div");
                 user.setAttribute("class", "user");
                 user.setAttribute("id", action.user_id);
                 let box = document.getElementById("box");
                 box.appendChild(user);
                 document.getElementById(action.user_id).style.left = action.move.x + "px";
                 document.getElementById(action.user_id).style.top = action.move.y + "px";
             }
         }
     };
     //手机move
     function onTouchMove(point) {
         document.getElementById(user_id).style.left = (point.changedTouches[0].clientX) + "px";
         document.getElementById(user_id).style.top = (point.changedTouches[0].clientY) + "px";
         //告诉其他用户我的动作
         let obj = {
             "user_id": user_id,//用户标识
             "say": "",//用户说话
             "move": {//移动数据
                 "x": point.changedTouches[0].clientX,
                 "y": point.changedTouches[0].clientY,
                 "z": 0,//高度位移
                 "t": 0,//仰角大小(相对正北)
                 "r": 0,//转角大小(相对正北)
             }
         };
         msg.send(JSON.stringify(obj));
     }
     document.getElementById(user_id).addEventListener("touchmove", onTouchMove, false);
     //电脑move
     function onMouseDown(point) {
         document.onmousemove = function (event) {
             document.getElementById(user_id).style.left = event.clientX + "px";
             document.getElementById(user_id).style.top = event.clientY + "px";
             //告诉其他用户我的动作
             let obj = {
                 "user_id": user_id,//用户标识
                 "say": "",//用户说话
                 "move": {//移动数据
                     "x": event.clientX,
                     "y": event.clientY,
                     "z": 0,//高度位移
                     "t": 0,//仰角大小(相对正北)
                     "r": 0,//转角大小(相对正北)
                 }
             };
             msg.send(JSON.stringify(obj));
         };
         document.onmouseup = function () {
             document.onmousemove = null;
             document.onmouseup = null;
         };
     }
     document.getElementById(user_id).addEventListener("mousedown", onMouseDown, false);
 </script>
 </body>
 </html>

打开防火墙1234端口

 firewall-cmd --zone=public --add-port=1234/tcp --permanent
 systemctl restart firewalld

启动swoole服务
```
 php index.php
```
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