Untitled

<?php

$connection = mysql_connect("localhost", "user", "password") or die("Couldn't connect to server!");
mysql_select_db("id2376907_users", $connection) or die("Couldn't connect to the database!");

if ($_POST['login']){
    if ($_POST['username'] && $_POST['password']){

    $username = $mysql_real_escape_string($_POST['username']);
    $password = $mysql_real_escape_string(hash("sha512", $_POST['password']));
    $user = $mysql_fetch_array(mysql_query("SELECT * FROM 'users' WHERE 'Username'"));
	if ($user == '0'){
		die("Brugernavne eksistere ikke! Prøv at lav <i>$username</i> idag! <a href='index.php'>&larr; Tilbage</a>");
    }
	if ($user['Password'] != $password){
		die("Forkert adgangskode! <a href='index.php'>&larr; Tilbage</a>");
	}
	$salt = hash("sha512", rand() . rand() . rand());
	setcookie("c_user", hash("sha512", $username), time() + 24 * 60 * 60, "/");
	setcookie("c_salt", $salt, time() + 24 * 60 * 60, "/");
	$userID = $user['ID'];
	mysql_query("UPDATE 'users' SET 'Salt'='$salt' WHERE 'ID'='$userID'");
	die("Du er nu logget ind som $username!");

	echo "
    <head>
        <title>Login</title>
    </head>
    <body style='font-family: Verdana, sans-serif;'>
       <div style='width: 80%; height: 80%; border: 1px solid #333;'>
            <h1>Login</h1><br />
            <form action='' method='post'>
                    <label>Brugernavn:</label><br />
                    <input type='text' name='username' /><br />

                    <label>Kodeord:</label><br />
                    <input type='password' name='password' /><br />
                    <input type='submit' value='Login' /><br />
                <h6>Ingen konto - <a href='register.php'>Registrer</a></h6>
            </form>
       </div>
    </body>
	"
?>