php 退出登录 清除cookie

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<?php
/**
 * Created by PhpStorm.
 * User: liuan
 * Date: 2018-11-20 0020
 * Time: 11:20
 */
header('content-type:text/html;charset=utf-8');
include_once 'lib/fun.php';
session_start();
setcookie("username_auto_login",'',time()-1);
setcookie("password_auto_login",'',time()-1);
setcookie('auto_login', false, time() + 3600 * 24 * 30);
unset($_SESSION['user']);

msg(1, '退出登录成功！', 'index.php');

如果需要清除多个cookie

public function logout(){
$_SESSION = array(); //清除SESSION值.
          if(isset($_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(),'',time()-1,'/');
            }
                session_destroy();  //清除服务器的sesion文件
}