本文主要和大家分享PHP中Socket服务器搭建和测试方法教程，希望能帮助到大家。
1.socket服务器搭建思路
1) 目的：理解socket服务器工作机制
2) 思路：创建socket -> 把socket加入连接池 -> 处理接收信息 -> 握手动作 -> 发送信息
注：复制到php文件，直接命令行可以运行，不需要其他支持
特别注意：为了能传输中文_sendMsg做了json_encode()
<?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('UTF-8', 'GBK', "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 <= 6) { $this->_disConnect($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; $index < strlen($data); $index++) { $decoded .= $data[$index] ^ $masks[$index % 4]; } return $decoded; } /** * 处理返回帧 * @param $buffer * @return string */ private function _frame($buffer) { $len = strlen($buffer); if ($len <= 125) { return "\x81" . chr($len) . $buffer; } else if ($len <= 65535) { return "\x81" . chr(126) . pack("n", $len) . $buffer; } else { return "\x81" . char(127) . pack("xxxxN", $len) . $buffer; } }}$sc = new SocketServer();$sc->run('127.0.0.1', 2046);3.客户端代码
注：直接复制到html，和上面的php文件在同一文件夹即可，特别注意onmessage解析的两层 parse
<!DOCTYPE html><html><head> <meta charset="utf-8" /> <title>WebSocket Test</title> <script language="javascript"type="text/javascript"> websocket = new WebSocket('ws://127.0.0.1:2046/'); websocket.onopen = function(evt) { console.log('connect'); websocket.send('{"data":"您好，世界！"}'); }; websocket.onclose = function(evt) { console.log('onclose'); console.log(evt); }; websocket.onmessage = function(evt) { console.log('onmessage'); if (evt.data) { console.log(JSON.parse(JSON.parse(evt.data))); } }; websocket.onerror = function(evt) { console.log('onerror'); console.log(evt); }; function sendMsg(){ var sendData = { 'data': document.getElementById('name').value}; websocket.send(JSON.stringify(sendData)); } </script></head><body> <h2>WebSocket Test</h2> <input type="text" name="name" id="name" /> <a href="javascript:;" onclick="sendMsg()">点击发送</a></body></html>4.测试示例
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