<?php
pengepala('content-type:text/html;charset=utf-8');
if(isset($_post['submit'])){
$username = $_post['username'];
$password = $_post['password'];
if(kosong($username)||kosong($password)){
header('Refresh:3 ;url=login.php');
echo '用户名密码不能为空';
exit;
}
}include{
}else{
s}
?>
![[Web front-end] Permulaan pantas Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Saya dapati masalahnya, pembolehubah PHP tidak peka huruf besar/kecil