cek_login

<?php
session_start();

$query = new mysqli('localhost', 'root', '', 'akademik');

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

$data = mysqli_query($query, "SELECT * FROM admin where username='$username' and password='$password' ") or die(mysqli_error($query));

$cek = mysqli_num_rows($data);

if($cek > 0){
    $_SESSION['username'] = $username;
    $_SESSION['status'] = $login;
    header('location:session.php');
}
else{
    header('location:index.php?pesan=gagal');
}