PHP function to achieve Log

In PHP program, completed after logging into the session, when the Log, you need to release the session, the corresponding code is shown below.

<?php
session_start();
if(isset($_SESSION["uid"]))  // 检测变量是否设置
{
    session_unset();  // 释放当前在内存中已经创建的所有$_SESSION变量，但是不删除session文件以及不释放对应的session id；
    session_destroy();  // 删除当前用户对应的session文件以及释放session id，内存中$_SESSION变量内容依然保留；
}
header("location:login.php"); // 重定向到登录界面
?>

have to be aware of is:

1. session_unset(); The release of all $ _SESSION variables currently in memory has been created, but does not delete the session file and does not release the corresponding session id;
2. session_destroy(); Delete files in the current user session and release the corresponding session id, the memory still retains the $ _SESSION variable content;

Related articles: "PHP language website login function"

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Author: Dai Xiang
E-mail: [email protected]
micro-channel Developer Home: Null
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