Detailed explanation of the steps to implement websocket real-time message push in PHP

This time I will bring you a detailed explanation of the steps to implement websocket real-time message push in php. What are the precautions for php to implement websocket real-time message push. The following is a practical case, let’s take a look.

php implements websocket real-time message push, for your reference, the specific content is as follows

##SocketService.php

<?php /**
 * Created by xwx
 * Date: 2017/10/18
 * Time: 14:33
 */
class SocketService
{
  private $address = &#39;0.0.0.0&#39;;
  private $port = 8083;
  private $_sockets;
  public function construct($address = &#39;&#39;, $port=&#39;&#39;)
  {
      if(!empty($address)){
        $this->address = $address;
      }
      if(!empty($port)) {
        $this->port = $port;
      }
  }
  public function service(){
    //获取tcp协议号码。
    $tcp = getprotobyname("tcp");
    $sock = socket_create(AF_INET, SOCK_STREAM, $tcp);
    socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
    if($sock address, $this->port);
    socket_listen($sock, $this->port);
    echo "listen on $this->address $this->port ... \n";
    $this->_sockets = $sock;
  }
  public function run(){
    $this->service();
    $clients[] = $this->_sockets;
    while (true){
      $changes = $clients;
      $write = NULL;
      $except = NULL;
      socket_select($changes, $write, $except, NULL);
      foreach ($changes as $key => $_sock){
        if($this->_sockets == $_sock){ //判断是不是新接入的socket
          if(($newClient = socket_accept($_sock)) === false){
            die('failed to accept socket: '.socket_strerror($_sock)."\n");
          }
          $line = trim(socket_read($newClient, 1024));
          $this->handshaking($newClient, $line);
          //获取client ip
          socket_getpeername ($newClient, $ip);
          $clients[$ip] = $newClient;
          echo "Client ip:{$ip}  \n";
          echo "Client msg:{$line} \n";
        } else {
          socket_recv($_sock, $buffer, 2048, 0);
          $msg = $this->message($buffer);
          //在这里业务代码
          echo "{$key} clinet msg:",$msg,"\n";
          fwrite(STDOUT, 'Please input a argument:');
          $response = trim(fgets(STDIN));
          $this->send($_sock, $response);
          echo "{$key} response to Client:".$response,"\n";
        }
      }
    }
  }
  /**
   * 握手处理
   * @param $newClient socket
   * @return int 接收到的信息
   */
  public function handshaking($newClient, $line){
    $headers = array();
    $lines = preg_split("/\r\n/", $line);
    foreach($lines as $line)
    {
      $line = chop($line);
      if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
      {
        $headers[$matches[1]] = $matches[2];
      }
    }
    $secKey = $headers['Sec-WebSocket-Key'];
    $secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
    $upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
      "Upgrade: websocket\r\n" .
      "Connection: Upgrade\r\n" .
      "WebSocket-Origin: $this->address\r\n" .
      "WebSocket-Location: ws://$this->address:$this->port/websocket/websocket\r\n".
      "Sec-WebSocket-Accept:$secAccept\r\n\r\n";
    return socket_write($newClient, $upgrade, strlen($upgrade));
  }
  /**
   * 解析接收数据
   * @param $buffer
   * @return null|string
   */
  public function message($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; $index frame($msg);
    socket_write($newClinet, $msg, strlen($msg));
  }
  public function frame($s) {
    $a = str_split($s, 125);
    if (count($a) == 1) {
      return "\x81" . chr(strlen($a[0])) . $a[0];
    }
    $ns = "";
    foreach ($a as $o) {
      $ns .= "\x81" . chr(strlen($o)) . $o;
    }
    return $ns;
  }
  /**
   * 关闭socket
   */
  public function close(){
    return socket_close($this->_sockets);
  }
}
$sock = new SocketService();
$sock->run();

web.html

<!doctype html>
<html lang="en">
 <head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width,initial-scale=1, maximum-scale=1, user-scalable=no">
 <title>websocket</title>
 </head>
 <body>
 <input id="text" value="">
 <input type="submit" value="send" onclick="start()">
 <input type="submit" value="close" onclick="close()">
<p id="msg"></p>
 <script>
 /**
 0：未连接
1：连接成功，可通讯
2：正在关闭
3：连接已关闭或无法打开
*/
  //创建一个webSocket 实例
  var webSocket = new WebSocket("ws://192.168.31.152:8083");
  webSocket.onerror = function (event){
    onError(event);
  };
  // 打开websocket
  webSocket.onopen = function (event){
    onOpen(event);
  };
  //监听消息
  webSocket.onmessage = function (event){
    onMessage(event);
  };
  webSocket.onclose = function (event){
    onClose(event);
  }
  //关闭监听websocket
  function onError(event){
    document.getElementById("msg").innerHTML = "<p>close</p>";
    console.log("error"+event.data);
  };
  function onOpen(event){
    console.log("open:"+sockState());
    document.getElementById("msg").innerHTML = "<p>Connect to Service</p>";
  };
  function onMessage(event){
    console.log("onMessage");
    document.getElementById("msg").innerHTML += "<p>response:"+event.data+"</p>"
  };
  function onClose(event){
    document.getElementById("msg").innerHTML = "<p>close</p>";
    console.log("close:"+sockState());
    webSocket.close();
  }
  function sockState(){
    var status = [&#39;未连接&#39;,&#39;连接成功，可通讯&#39;,&#39;正在关闭&#39;,&#39;连接已关闭或无法打开&#39;];
      return status[webSocket.readyState];
  }
 function start(event){
    console.log(webSocket);
    var msg = document.getElementById(&#39;text&#39;).value;
    document.getElementById(&#39;text&#39;).value = &#39;&#39;;
    console.log("send:"+sockState());
    console.log("msg="+msg);
    webSocket.send("msg="+msg);
    document.getElementById("msg").innerHTML += "<p>request"+msg+"</p>"
  };
  function close(event){
    webSocket.close();
  }
 </script>
 </body>
</html>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of the steps for PHP to dynamically obtain function parameters

Detailed explanation of the use of PHP status mode

The above is the detailed content of Detailed explanation of the steps to implement websocket real-time message push in PHP. For more information, please follow other related articles on the PHP Chinese website!