How to click to log out after php login?

Every time you jump to a page, first determine whether the session exists. If the session does not exist, jump to the login page. After logging in, save the session. If there is a session, continue the operation. If you click to log out, clear the session first, and then jump to the login interface. .

php After logging in, click to log out. Implementation code:

<?php
$_SESSION = array(); //清除SESSION值.
    if(isset($_COOKIE[session_name()])){  //判断客户端的cookie文件是否存在,存在的话将其设置为过期.
    setcookie(session_name(),&#39;&#39;,time()-1,&#39;/&#39;);
    }
    session_destroy();  //清除服务器的sesion文件

echo "<script>location.href=&#39;index.php&#39;;</script>";
?>

session variables are used to store information about the user session (session), or change User session settings. Session variables store information for a single user and are available to all pages in the application.

If you want to delete some session data, you can use the unset() or session_destroy() function.

Recommended reading: php server

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