小白問題，幫忙！ ！

Question

<?php 

session_start();error_reporting(0);if($_GET['act']=='logout'){unset($ _SESSION);header('location: ./login.php');die;}$tips='';if($_POST['username']&& $_POST['password']){include('../ inc/aik.config.php');$admin_name=htmlspecialchars($_POST['username']);$admin_pass=md5ff(htmlspecialchars($_POST['password']));if($admin_name==$aik[ 'admin_name']&& $admin_pass==$aik['admin_pass']){$_SESSION['admin_aik']='http://127.0.0.1/';echo '<script>window.location.href=" ./index.php";</script>';die;}else{$tips='帳號或密碼錯誤！ ';}}function md5ff($xzv_0=1){return md5($xzv_0.'ff371');}?>

#這段程式碼有沒有問題？ ？ ？

Answer 1

問題是啥?