<?php
include 'connect.php'; //connection file
$user = $_POST['username'];
$pass = $_POST['password'];
$sql = "SELECT * FROM phpbb_users WHERE username = '$user' AND password = '$pass'";
$res = mysql_query($sql);
$res1 = mysql_num_rows($res);
if($res1 < 0) {
echo 'greshka';
} else {
$_SESSION['log_in'] = $user;
}
?>