root/cek_login.php

        
<?php 
session_start();

include 'koneksi.php';

$username = $_POST['username'];
$password = md5($_POST['password']);


$login = mysqli_query($koneksi,"select * from tb_user where username='$username' and password='$password'");
$cek = mysqli_num_rows($login);

if($cek > 0){
  $data = mysqli_fetch_assoc($login);
  if($data['role']=="admin"){
    $_SESSION['username'] = $username;
    $_SESSION['password'] = $password;
    $_SESSION['role'] = "admin";
    header("location:admin");
  }else if($data['role']=="kasir"){
    $_SESSION['username'] = $username;
    $_SESSION['password'] = $password;
    $_SESSION['role'] = "kasir";
    header("location:kasir");
  }else if($data['role']=="owner"){
    $_SESSION['username'] = $username;
    $_SESSION['password'] = $password;
    $_SESSION['role'] = "owner";
    header("location:owner");
  }else{
    header("location:index.php?info=gagal");
  }	
}else{
  header("location:index.php?info=gagal");
}
?>