Proses

<?php
session_start();
require_once("koneksi.php");
date_default_timezone_set("Asia/Jakarta");
$tanggal = date("Y-m-d H:i:s");
$username = $_POST['username'];
$pass = $_POST['password'];
$cekuser = mysqli_query("SELECT * FROM user WHERE username = '$username'");
$jumlah = mysqli_num_rows($cekuser);
$hasil = mysqli_fetch_array($cekuser);
$expired = $hasil['expired_date'];
$level = $hasil['level'];
$level1 = "Banned";
if($jumlah == 0) {
   header("location:login.php?pesan=1&isi=Pastikan data yang Anda masukkan benar");
} else {
   if($pass <> $hasil['password']) {
     header("location:login.php?pesan=1&isi=Password yang Anda masukkan salah.");
} else {
   if($level == $level1) {
     header("location:login.php?pesan=1&isi=Akun Anda sudah dibanned.");
} else {
   if($tanggal > $expired) {
     header("location:login.php?pesan=1&isi=Akun Anda sudah jatuh tempo.");
   } else {
     $_SESSION['username'] = $hasil['username'];
     header('location:/');
   }
}
ERROR
?>
<? }
?>
<? } ?>