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PHP implements anti-ajax push

php中世界最好的语言Original: 2018-03-24 13:25:271185browse

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>

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));

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));

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!

PHP implements anti-ajax push

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