vl_user.php

<?php
session_start();
include "koneksi.php";

$Username = $_POST["Username"];
$Password = $_POST["Password"];

$query = mysqli_query ($konek, "SELECT * FROM user WHERE Username='$Username' AND Password='$Password'");

// Validasi Login
if ($_POST){

    $queryuser = mysqli_query ($konek, "SELECT * FROM user WHERE Username='$Username'");

    $user = mysqli_fetch_array ($queryuser);

    if($user){
            if (password_verify($Password, $user["Password"])){

                $_SESSION["Username"]           = $user["Username"];
                $_SESSION["Password"]           = $user["Password"];
                $_SESSION["Id_Usergroup_User"]  = $user["Id_Usergroup_User"];
                $_SESSION["Id_User"]            = $user["Id_User"];
                $_SESSION["Foto"]               = $user["Foto"];
                $_SESSION["Login"]              = true;

                if ($_SESSION["Id_Usergroup_User"] == 1){
                    header ("Location: admin/index.php");
                    exit();
                }
                else if($_SESSION["Id_Usergroup_User"] == 2){
                    header ("Location: dosen/index.php");
                    exit();
                }
                else if($_SESSION["Id_Usergroup_User"] == 3){
                    header ("Location: mahasiswa/index.php");
                    exit();
                }
                else{
                    header("Location :pagenotfound.php");
                    exit();
                }
            }
            else
            {
                header ("Location: index.php?Err=4");
                exit();
            }
    }
    else if (empty ($Username) && empty ($Password)){
        header ("Location: index.php?Err=1");
        exit();
    }
    else if(empty ($Username)){
        header ("Location: index.php?Err=2");
        exit();
    }
    else if(empty ($Password)){
        header ("Location: index.php?Err=3");
        exit();
    }
    else{
        header ("Location: index.php?Err=5");
        exit();
    }
}

?>