sada

<?php
session_start();
function redirect($url){
	header('Location:' . $url);
	exit();
}
mysql_connect('localhost','Ucenik','bojan123') or die('Pokusaj opet glavonja!');
mysql_select_db('skola');




	if (isset($_POST['submit'])) {


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


		$query = mysql_query("SELECT * FROM `users` WHERE username='$username' AND password='$password'");
		$redovi = mysql_num_rows($query);


		if($redovi != 0){

			while ($red = mysql_fetch_assoc($query)) {
				$dbusername = $red['username'];
				$dbpassword = $red['password'];

			}


			if ($username != $dbusername && $password != $dbpassword) {
				echo "Netacan login";
			}else{
				echo redirect('sesija.php');
			}

		}else{
			echo 'Nevalja!';
		}

	}