<?php
session_start();
$username = trim($_POST["username"]);
$password = trim($_POST["password"]);

if(isset($username) && isset($password))
{
	mysql_connect("localhost", "root", "") or die("Couldn't connect!");
	mysql_select_db("strona") or die("Couldn't find DataBase");

	$query = mysql_query("SELECT * FROM `uzytkownicy` WHERE `username` = '$username' AND `password` = '$password' LIMIT 1");
	if(mysql_num_rows($query) > 0)
	{
		$row = mysql_fetch_array($query);
		$_SESSION['logged'] = 1;
		$_SESSION['admin'] = $row['adminlvl'];
	} else echo 'Zły login lub hasło!';
} else echo 'Podaj wszystkie dane!';

?>