do-login.php

<?php
    if(isset($_POST['get']) == 'login'){
        include("./inc/config.php");
        session_start();
            $user = mysql_real_escape_string(stripslashes($_POST['user']));
            $pass = mysql_real_escape_string(stripslashes($_POST['pass']));
            $pass = md5($pass);
            // $sqlcek = mysql_query("select * from user where user='$user' AND pass='$pass' AND aktif='Y'");
            $sqlcek = mysql_query("SELECT * FROM user WHERE user = '$user'");
            $jml = mysql_num_rows($sqlcek);
            $data = mysql_fetch_array($sqlcek);

            if($jml == 0){
                    echo '<strong style="color:red;">Username tidak terdaftar!</strong>';
            } else {
            if($pass <> $data['pass']){
                    echo '<strong style="color:red;">Password yang anda masukan salah!</strong>';
            } else {
                    $_SESSION['login'] = TRUE;
                    $_SESSION['username'] = $data['username'];
                    $_SESSION['nama'] = $data['nama_lengkap'];

                    header('location:./index.php');
            }
            }
    }
?>