Tutorial on setting up and testing Socket server in PHP

This article mainly shares with you the tutorial on how to build and test the Socket server in PHP. I hope it can help you.

1. Ideas for building a socket server

1) Purpose: Understand the working mechanism of the socket server

2) Idea: Create a socket -> Add the socket to the connection pool -> Process receiving information -> Handshake action -> Send information

2.socket server code

Note: Copy to php file and run directly from the command line, no other support is required

Special note: In order to transmit Chinese _sendMsg, json_encode() was done

<?php /** * Socket服务器 * @author wuchangliang 2018/1/17 */class SocketServer{    private $sockets; //连接池    private $master;    private $handshake;    /**     * @param $address     * @param $port     */    public function run($address, $port)    {        //配置错误级别、运行时间、刷新缓冲区        echo iconv(&#39;UTF-8&#39;, &#39;GBK&#39;, "欢迎来到PHP Socket测试服务。 \n");        error_reporting(0);        set_time_limit(0);        ob_implicit_flush();        //创建socket        $this->master = $this->_connect($address, $port);        $this->sockets[] = $this->master;        //运行socket        while (true) {            $sockets = $this->sockets;            $write = NULL;            $except = NULL;            socket_select($sockets, $write, $except, NULL); //$write,$except传引用            foreach ($sockets as $socket) {                if ($socket == $this->master) {                    $client = socket_accept($socket);                    $this->handshake = false;                    if ($client) {                        $this->sockets[] = $client; //加入连接池                    }                } else {                    //接收信息                    $bytes = @socket_recv($socket, $buffer, 2048, 0);                    if ($bytes _disConnect($socket);                        continue;                    };                    //处理信息                    if (!$this->handshake) {                        $this->_handshake($socket, $buffer);                    } else {                        $buffer = $this->_decode($buffer);                        $this->_sendMsg($buffer, $socket);                    }                }            }        }    }    /**     * 创建socket连接     * @param $address     * @param $port     * @return resource     */    private function _connect($address, $port)    {        //创建socket        $master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)        or die("socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n");        socket_bind($master, $address, $port)        or die("socket_bind() failed: reason: " . socket_strerror(socket_last_error($master)) . "\n");        socket_listen($master, 5)        or die("socket_listen() failed: reason: " . socket_strerror(socket_last_error($master)) . "\n");        return $master;    }    /**     * 握手动作     * @param $socket     * @param $buffer     */    private function _handshake($socket, $buffer)    {        //握手动作信息        $buf = substr($buffer, strpos($buffer, 'Sec-WebSocket-Key:') + 18);        $key = trim(substr($buf, 0, strpos($buf, "\r\n")));        $new_key = base64_encode(sha1($key . "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true));        $new_message = "HTTP/1.1 101 Switching Protocols\r\n";        $new_message .= "Upgrade: websocket\r\n";        $new_message .= "Sec-WebSocket-Version: 13\r\n";        $new_message .= "Connection: Upgrade\r\n";        $new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";        //记录握手动作        socket_write($socket, $new_message, strlen($new_message));        $this->handshake = true;    }    /**     * 断开socket连接     * @param $socket     */    private function _disConnect($socket)    {        $index = array_search($socket, $this->sockets);        socket_close($socket);        if ($index >= 0) {            array_splice($this->sockets, $index, 1);        }    }    /**     * 发送信息     * @param $buffer     * @param $client     */    private function _sendMsg($buffer, $client)    {        $send_buffer = $this->_frame(json_encode($buffer));        foreach ($this->sockets as $socket) {            if ($socket != $this->master && $socket != $client) { //广播发送（除了自己）                socket_write($socket, $send_buffer, strlen($send_buffer));            }        }    }    /**     * 解析数据帧     * @param $buffer     * @return null|string     */    private function _decode($buffer)    {        $len = $masks = $data = $decoded = null;        $len = ord($buffer[1]) & 127;        if ($len === 126) {            $masks = substr($buffer, 4, 4);            $data = substr($buffer, 8);        } else if ($len === 127) {            $masks = substr($buffer, 10, 4);            $data = substr($buffer, 14);        } else {            $masks = substr($buffer, 2, 4);            $data = substr($buffer, 6);        }        for ($index = 0; $index run('127.0.0.1', 2046);

3. Client code

Note: Copy directly to html, and the above php file Just stay in the same folder, pay special attention to the two layers of parse parsed by onmessage

nbsp;html>    <meta>    <title>WebSocket Test</title>    <script>        websocket = new WebSocket(&#39;ws://127.0.0.1:2046/&#39;);        websocket.onopen = function(evt) {            console.log(&#39;connect&#39;);            websocket.send(&#39;{"data":"您好，世界！"}&#39;);        };        websocket.onclose = function(evt) {            console.log(&#39;onclose&#39;);            console.log(evt);        };        websocket.onmessage = function(evt) {            console.log(&#39;onmessage&#39;);            if (evt.data) {                console.log(JSON.parse(JSON.parse(evt.data)));            }        };        websocket.onerror = function(evt) {            console.log(&#39;onerror&#39;);            console.log(evt);        };        function sendMsg(){            var sendData = { &#39;data&#39;: document.getElementById(&#39;name&#39;).value};            websocket.send(JSON.stringify(sendData));        }    </script>    <h2 id="WebSocket-Test">WebSocket Test</h2>    <input>    <a>点击发送</a>

4. Test example

Related recommendations:

How to use PHP to implement Socket server

Send and receive data to socket server in PHP_PHP tutorial

javascript - How to configure WebSocket server, using SegmentFault

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