Introduction to PHP session (Session) access restrictions (code example)

This article brings you an introduction (code example) about PHP session (Session) access restrictions. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Login

<?php
    // 启动会话
    session_start();
    //  注册登陆成功的 admin 变量，并赋值 true
    $_SESSION["admin"] = true;
    echo "login success";
?>

Access restrictions

<?php
    //  启动会话，这步必不可少
    session_start();
    //  判断是否登陆
    if (isset($_SESSION["admin"]) && $_SESSION["admin"] === true) 
    {
        //echo "您已经成功登录";
        echo "login success";
    } 
    else 
    {
        //  验证失败，将 $_SESSION["admin"] 置为 false
        $_SESSION["admin"] = false;
        die("no permission");
    }  
?>

Logout

<?php 
    // 启动会话
    session_start();
    //  这种方法是将原来注册的某个变量销毁
    unset($_SESSION[&#39;admin&#39;]);
    //  这种方法是销毁整个 Session 文件
    session_destroy();
    echo "logout success";
?>

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