PHP Socket server construction and testing example sharing

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 the received information-> Handshake action-> Send the information

2. Socket server code

Note: Copy to php file, it can be 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 <= 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, &#39;Sec-WebSocket-Key:&#39;) + 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(&#39;127.0.0.1&#39;, 2046);

3. Client code

Note: Copy it directly to html and put it in the same folder as the above php file. Pay special attention to the two layers of onmessage parsing. parse

<!DOCTYPE html><html><head>    <meta charset="utf-8" />    <title>WebSocket Test</title>    <script language="javascript"type="text/javascript">        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></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. Test example

Related recommendations:

Simple use of Socket in PHP Method

Tutorial on setting up and testing Socket server in PHP

Detailed explanation of PHP socket push technology

The above is the detailed content of PHP Socket server construction and testing example sharing. For more information, please follow other related articles on the PHP Chinese website!