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ajax combined with mysql database to achieve partial data refresh

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Release： 2018-03-30 15:41:24

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This time I will bring you ajax combinationmysql databaseTo achieve partial data refresh, ajax combined with mysql database to achieve partial data refreshWhat are the precautions, the following is a practical case, one Get up and take a look.

Effect status: switch between status lock and non-lock by clicking on the lock status

1. Main program: 01.php imports smarty and mysql classes, and obtains the data import list template

<?php
  include &#39;./include/Mysql.class.php&#39;;
  include &#39;./libs/Smarty.class.php&#39;;
  $db=new Mysql;
  $smarty=new Smarty;
  $lists=$db->getALL('users');
  $smarty->assign('lists',$lists);
  $smarty->display('list.html');
?>

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2. The list template uses smarty Traverse the template data and display it, in which ajax is called to change the lock status

<!DOCTYPE html>
<html>
<head>
  <meta charset=utf-8>
  <title>用户权限展示表</title>
</head>
<body>
    <table align="center" border="1" width="500">
      <center><h2>用户权限表</h2></center>
      <tr>
        <th>uid</th><th>用户名</th><th>密码</th><th>锁定状态</th><th>角色</th>
      </tr>  
      {foreach $lists as $list}
        <tr align="center">
          <td>{$list.uid}</td>
          <td>{$list.username}</td>
          <td>{$list.password}</td>
          {if $list.is_lock==1}
            <td><a href="javascript:lock(0,{$list.uid});" rel="external nofollow" >锁定</a></td>
            {else}
            <td><a href="javascript:lock(1,{$list.uid})" rel="external nofollow" ;>取消锁定</a></td>  
          {/if}    
          {if $list.role==1}
              <td>管理员</td>
          {else}
              <td>编辑者</td>    
          {/if}
        </tr>    
      {/foreach}  
    </table>  
</body>
    <script type="text/javascript">
      function lock(lock,uid){
          //创建ajax对象
          var xhr=new XMLHttpRequest();
          //打开一个链接
          xhr.open('get','02.php?is_lock='+lock+"&uid="+uid);
          //发送ajax请求
          xhr.send(null);
          //设置回调、监听函数
          xhr.onreadystatechange=function(){
            //如果ajax状态码响应正常且网络正常，获取响应文本
            if(xhr.readyState==4&&xhr.status==200){
              if(xhr.responseText){
                window.location.reload();
              }else{
                alert("切换状态失败！");
              }
            }
          }
        }
    </script>
</html>

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3.ajax response script, receives the data passed by ajax through the get method, changes the database content and The response text is sent back to the js script

<?php
  include &#39;./include/Mysql.class.php&#39;;
  $lock=$_GET[&#39;is_lock&#39;];
  $uid=$_GET[&#39;uid&#39;];
  $db=new Mysql;
  $result=$db->update('users',"is_lock=$lock","uid=$uid");
  if($result){
    echo true;
  }else{
    echo false;
  }
?>

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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!