proses_login.php

<?php
    require_once("koneksi.php");

    $username=$_GET['username'];
    $password=$_GET['password'];

    $query=mysql_query("SELECT * FROM user where username='$username' and password='$password'");
    $row=mysql_fetch_assoc($query);
    if($username!="" && $password!=""){
        if($username==$row['username'] && $password==$row['password']){
            if($row['hak_akses']=="admin"){
                echo "Selamat datang Admin";
            }
            elseif($row['hak_akses']=="user"){
                echo "Selamat Datang User";
            }
        }
    }
?>