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How to clear history in php

藏色散人Original: 2021-12-14 09:23:021931browse

How to clear the history in php: 1. Create a PHP sample file; 2. Set the cookie through setcookie; 3. Clear the history through "echo 'clear';" and other diam.

#The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

php How to clear history?

php simply implements cookie history and clearing history functions

The code is as follows:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>SQT</title>
<style>div{ width:300px;height:400px; background:#CFF; padding:20px}</style>
</head>
<?php
//用于测试的文档
$all_data = array(
1 => array(&#39;1:标题1&#39;,&#39;内容1……&#39;),
2 => array(&#39;2:标题2&#39;,&#39;内容2……&#39;),
3 => array(&#39;3:标题3&#39;,&#39;内容3……&#39;),
4 => array(&#39;4:标题4&#39;,&#39;内容4……&#39;),
);
 
$id=isset($_GET[&#39;id&#39;])?$_GET[&#39;id&#39;]:1;
 
//判断有无设置action
$action = isset($_GET[&#39;action&#39;])?$_GET[&#39;action&#39;]:$id; 
if($action==&#39;clear&#39;){
//清空cookie
setcookie(&#39;history&#39;,&#39;&#39;,time()-3600);
//数组清空
$his=array();
}else{
if(!isset($_COOKIE[&#39;history&#39;])){
$his[]=$id;
}else{
$his=explode(&#39;|&#39;,$_COOKIE[&#39;history&#39;]);
array_unshift($his, $id);
$his=array_unique($his);
if(count($his)>4){
array_pop($his);
}
}
}
setcookie(&#39;history&#39;,implode(&#39;|&#39;, $his));
?>
 
<body>
<div>
<form >
<table>
    <tr><td><?php echo $all_data[$id][0]?></td></tr>
    <tr><td><?php echo $all_data[$id][1]?></td></tr>
    <tr>
    <td>  
        <p><a href="04.php?id=<?php echo $id-1==0?4:$id-1;?>">上一页</a></p>
        </td>
        <td>
         <p><a href="04.php?id=<?php echo $id+1==5?1:$id+1;?>">下一页</a></p>
        </td>
    </tr>
<tr>
     <td>
        <p>浏览历史</p>
     </td>
         <td>
        <a href="04.php?action=<? echo &#39;clear&#39;;?>">清除记录</a>
     </td>
    </tr>
        <tr>
         <ul>
         <td>
            <?php foreach($his as $v) {?>
            <li><a href="04.php?id=<? echo $v;?>"><?php echo $all_data[$v][0] ; ?></a></li>
            <?php } ?>
         </td>
</ul>
        </tr>
    </table>
</form>
</div>
</body>
</html>

Copy and paste to run~

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