Examples explaining the definition and usage of PHP Socket network operation classes-PHP Tutorial-php.cn

Examples explaining the definition and usage of PHP Socket network operation classes

巴扎黑

Release： 2023-03-15 17:26:01

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This article mainly introduces the definition and usage of the PHP Socket network operation class. It analyzes the definition of the PHP Socket network operation class in the form of examples and related usage skills such as sending query requests in combination with ajax. Friends in need can refer to it

The examples in this article describe the definition and usage of PHP Socket network operation classes. Share it with everyone for your reference, the details are as follows:

web front-end test:

<html>
<head>
  <title>test</title>
  <script>
  g_xmlHttpReq = new XMLHttpRequest();
  function onReplyCallback()
  {
    if(g_xmlHttpReq.readyState==4 && g_xmlHttpReq.status==200)
    {
      alert(g_xmlHttpReq.responseText);
    }
  }
  function on_stop_service()
  {
    var cmd = document.getElementById("inCmd").value;
    g_xmlHttpReq.open("GET","./service/main.php?cmd=" + cmd,true);
    g_xmlHttpReq.onreadystatechange=onReplyCallback;
    g_xmlHttpReq.send(null);
  }
  </script>
</head>
<body>
<input type="text" id="inCmd">
<hr>
<button onclick="on_stop_service()">关闭服务</button>
</body>
</html>

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mysocket.php:

<?php
class Connector
{
  public static $instance=null;
  public $conn;
  private function __construct()
  {
      set_time_limit(0);
      $ip = &#39;192.168.238.1&#39;;
      $port = 8888;
      if(($this->conn = socket_create(AF_INET,SOCK_STREAM,SOL_TCP)) < 0)
      {
        echo "socket_create() 失败的原因是:".socket_strerror($this->conn)."\n";
      }
      $result = socket_connect($this->conn, $ip, $port);
      if ($result < 0) {
        echo "socket_connect() failed.\nReason: ($result) " . socket_strerror($result) . "\n";
      }else {
        echo "连接OK\n";
      }
  }
  public static function getInstance()
  {
    if(is_null(self::$instance))
    {
      self::$instance = new Connector;
    }
    return self::$instance;
  }
  public function sendMsg($msg)
  {
    socket_write($this->conn,$msg);
  }
  public function getMsg()
  {
    $clients = array($this->conn);
    while(true)
    {
      $read = $clients;
      $wrSet = NULL;
      $errSet = NULL;
      if(socket_select($read, $wrSet,$errSet, 3) < 1)
      {
        continue;
      }
      foreach($read as $read_sock)
      {
        $data = @socket_read($read_sock,1024,PHP_BINARY_READ);
        socket_close($this->conn);
        return $data;
      }
    }
  }
}
?>

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main.php (calling place):

<?php
require_once(&#39;mysocket.php&#39;);
$con = Connector::getInstance();
$req = $_GET[&#39;cmd&#39;];
$con->sendMsg($req);
$ret = $con->getMsg();
echo $ret;
?>

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Application description:

The client initiates an ajax request to call Php, and then PHP uses the socket to further initiate a request to the C++ module.

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