[PHP] Registracija uporabnika

<?php
	error_reporting(E_ALL);
	
	session_start();
	
	if(!get_magic_quotes_gpc())
	{
		$username = strval(mysql_escape_string($_POST['username']));
		$password = strval(mysql_escape_string($_POST['password']));
	}
	else
	{
		$username = strval($_POST['username']);
		$password = strval($_POST['password']);
	}
	
	require_once("data.php");
	
	$errors = array();
	$validation = false;
	
	mysql_pconnect($host, $user, $password) or die("Failed to connect!");
	mysql_select_db($database) or die("Failed to select!");
	
	if($username == '')
	{
		$errors[] = 'Username missing!';
		$validation = true;
	}
	if($password == '')
	{
		$errors[] = 'Password missing!';
		$validation = true;
	}
	
	if($username != '')
	{
		$sql = "SELECT FROM users WHERE username = '$username'";
		$result = mysql_query($sql);
		if($result)
		{
			if(mysql_num_rows($result) > 0)
			{
				$errors[] = 'Username already in use!';
				$validation = true;
			}
			@mysql_free_result($result);
		}
		else
		{
			die("1Query failed!");
		}
	}
	
	if($validation)
	{
		$_SESSION['ERRORS'] = $errors;
		session_write_close();
		header("location: register.php");
		exit();
	}
	
	$sql = "INSERT INTO users(username, password) VALUES('username', '".md5($_POST['password'])."')"; 
	$result = @mysql_query($sql);
	
	if($result)
	{
		header("location: login.php");
		exit();
	}
	else
	{
		die("2Query failed!");
	}
?>

die("1Query failed!");
var_dump($sql);
var_dump(mysql_error());

var_dump($sql);
var_dump(mysql_error());
die("1Query failed!");