login

<?php
    if(isset($_REQUEST['submit'])){
        $username = $_REQUEST['username'];
        $username = preg_replace('/[^a-zA-Z0-9]/', '', $username);
        $password = MD5($_REQUEST['password']);

        $hasil = mysqli_query($db_conn,"SELECT * FROM un_user WHERE username='$username' AND password='$password'");
            if(mysqli_num_rows($hasil) > 0){
                session_start();
                $data = mysqli_fetch_array($hasil);
                $_SESSION['logged'] = $data['UID'];
                $_SESSION['username'] = $data['username'];
                /* jika fungsi:
                        header('Location: ./');
                   tidak bisa digunakan, HAPUS atau berikan tanda komentar
                   kemudian aktifkan (hapus tanda //) pada skrip:
                        echo '<script>window.location("./");</script>';
                */
                header('Location: ./');
                //echo '<script>window.location("./");</script>';
            } else {
                echo '<script>alert("Username dan Password tidak sesuai!");</script>';
            }
    }

    ?>