PHP implements anti-ajax push-PHP Tutorial-php.cn

PHP implements anti-ajax push

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Release： 2023-03-22 07:36:02

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This time I will bring you PHP to implement anti-ajax push. What are the precautions for PHP to implement anti-ajax push? . The following is a practical case, let's take a look.

Entry fileindex.html

<!DOCTYPE HTML>
<html>
<head>
  <title>反ajax推送</title>
  <style>
    .send{color:#555;text-align: left;}
    .require{color:blue;text-align: right;}
    .content_box{text-align: center;margin: 20px;
          border: 1px solid #ddd;padding: 20px;}
  </style>
  <script src="http://code.jQuery.com/jquery-1.11.2.min.js"></script>
</head>
<body>
  <p class="content_box" id="content_box_title" style="border: none;">消息框</p>
  <p class="content_box" id="content_box">
  </p>
  <p style="width: 450px;margin: 0 auto;">
    <select id="username" style="font-size: 20px;">
      <option value="1" selected="selected">1</option>
      <option value="2">2</option>
    </select>
    <input type="text" style="font-size: 20px;" value="" id="send_text">
    <button id="btn_send" style="font-size: 20px;">发送</button>
    <button id="btn_link" style="font-size: 20px">连接</button>
  </p>
  <p class="error_tip" id="error_tip" style="color: red;">
  </p>
  <script>
    $(function(){
      //发送消息
      $('#btn_send').click(function(){
        var send_text = $('#send_text').val();
        if(send_text.length <= 0){
          $(&#39;#error_tip&#39;).html(&#39;不能输入空值&#39;);
        }else{
          send(send_text);
        }
      });
      //按回车键发送消息
      $(&#39;#send_text&#39;).on(&#39;keyup&#39;,function(e){
        if(e.keyCode == 13){
          $(&#39;#btn_send&#39;).trigger(&#39;click&#39;);
        }
      });
      //建立通讯链接
      $(&#39;#btn_link&#39;).click(function(){
        connect();
        var _this = $(this);
        _this.attr(&#39;disabled&#39;,true);
        _this.html(&#39;已连接&#39;);
      });
    });
    //建立通讯连接函数
    function connect(){
      $(&#39;#content_box_title&#39;).html($(&#39;#username&#39;).val()+&#39;的消息窗口&#39;);
      $.ajax({
        data:{&#39;user&#39;:$(&#39;#username&#39;).val()},
        url:&#39;ajaxPush.PHP&#39;,
        type:&#39;get&#39;,
        timeout:0,
        dataType:&#39;json&#39;,
        success:function(data){
          $(&#39;#content_box&#39;).append(&#39;<p class="require">'+data.msg+'</p>');
          connect();
        }
      });
    }
    //发送消息函数
    function send(massege){
      var user =$('#username').val();
      $.getJSON('write.php',{'msg':massege,'user':user},function(data){
        if(data.sf){
          $('#content_box').append('<p class="send">'+massege+'</p>');
          $('#send_text').val('');
        }else{
          $('#error_tip').html('输入保存错误！');
        }
      });
    }
  </script>
</body>
</html>

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ajax processing input write.php

<?php
/**
 * Created by TXM.
 * Time: 2015/4/18 13:13
 * function:
 */
$filename = dirname(FILE).&#39;/data.txt&#39;;
$isread_file = dirname(FILE).&#39;/isread.txt&#39;;
$user = dirname(FILE).&#39;/user.txt&#39;;
//写入消息，消息未读，谁发送的消息
file_put_contents($filename,$_GET[&#39;msg&#39;]);
file_put_contents($isread_file,&#39;0&#39;);
file_put_contents($user,$_GET[&#39;user&#39;]);
echo json_encode(array(&#39;sf&#39;=>true));

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Long polling push ajaxPush.php

<?php
/**
 * Created by TXM.
 * Time: 2015/4/18 13:12
 * function:
 */
$filename = dirname(FILE).&#39;/data.txt&#39;;
$isread_file = dirname(FILE).&#39;/isread.txt&#39;;
$userfile = dirname(FILE).&#39;/user.txt&#39;;
$get_user = $_GET[&#39;user&#39;] == &#39;1&#39;?&#39;2&#39;:&#39;1&#39;;
$msg=&#39;&#39;;
while(1){
  $msg = file_get_contents($filename);
  $isread = file_get_contents($isread_file);
  $user = file_get_contents($userfile);
  //是对方发送的消息，设置消息已读，退出循环。
  if($isread == &#39;0&#39; && $get_user == $user){
    file_put_contents($isread_file,&#39;1&#39;);
    break;
  }
  sleep(1);
}
echo json_encode(array(&#39;msg&#39;=>$msg));

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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!