adawdwd

<?php

session_start();

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

if ($username&&$password);
{
    $connect = mysql_connect("localhost", "root", "") or die("Kan niet verbinden met de database!");
    mysql_select_db("login") or die("database onvindbaar!");
}
    $query = mysql_query("SELECT * FROM users WHERE username='$username'");

    $numrows = mysql_num_rows($query);

    if($numrows!==0);
    {
        while($row = mysql_fetch_assoc($query));
        {
            $dbusername = $row['username'];
            $dbpassword = $row['password'];
        }

        if($username==$dbusername&&md5($password)==$dbpassword)
        {
            echo "Je bent ingelogd!";
            $_SESSION['username'] = $username;
        }
        else

            echo "Je password is onjuist!";
        {


    }
    else
        or die("Gebruiker bestaat niet!");


}
else
    or die("Vul in een gebruikersnaam en wachtwoord in!");
?>