php oop return data fra class fil til anden

Kode 

<?php
//MYSQL CONNECTION
define("MYSQL_USERNAME", "DITBRUGERNAVN");
define("MYSQL_PASSWORD", "DITPASSWORD");
define("MYSQL_DATABASE", "DINDATABASE");
define("MYSQL_HOST", "DINHOST");
?>

Kode 

<?php
class Mysql
{
	//CURRENT CONNECTION
	private $Connection;

	//CURRENT Query
	private $Query;

	//CURRENT SELECTED ROWS
	private $Rows;

	//NUMBERS OF ROWS
	private $RowNumbers;	

	//CONSTRUCTOR
	public function __construct()
	{


		//CONNECT TO DATABASE
		$this->Connection = mysql_connect(MYSQL_HOST, MYSQL_USERNAME, MYSQL_PASSWORD);
       		mysql_select_db(MYSQL_DATABASE, $this->Connection);
	}


	//QUERY STRING
	public function Query($Query)
	{
		$this->Query = mysql_query($Query, $this->Connection);
		if($this->Query)
		{
			return true;
		}else{
			return false;
		}
	}


	//GET DATA FROM THE DATABASE
    	public function GetRows(){
       	 	$this->Rows = mysql_fetch_array($this->Query);
		return $this->Rows;
    	}
    
	
	//GET NUMBERS OF ROWS FROM THE DATABASE
    	public function GetRowNumbers(){
        	$this->RowNumbers = mysql_num_rows($this->Query);

		return $this->RowNumbers;
    	}


	//GUARD AGAINST QUOTES
	public static function Slashes($x) 
	{
		if (!get_magic_quotes_gpc()) {
    			return addslashes($x);
		}else{
    			return $x;
		}
	}
} 
?>

Kode 

<?php
class User {

	//CONTAIN DATABASE
	private $Database;	


	//CONSTRUCTOR
	public function __construct()
	{
		$this->Database = new Mysql();
	}


     	public function CheckUser($Username, $Password) {

		$Query = "SELECT * FROM Users WHERE username = '".Mysql::Slashes($Username)."' AND password = '".Mysql::Slashes($Password)."'";

		if($this->Database->Query($Query)) {

			//IF ONLY ONE ROW IS FOUND
			if ($this->Database->GetRowNumbers() == 1) {
				return true;
			}else{
				return false;
			}
		}else{
			return false;
		}
	}
}
?>

Kode 

<?php
include("config.php");
include("mysql.class.php");
include("user.class.php");

$User = new User();

//FORSLAG 1
$User->CheckUser("Brugernavn","Password"); //RETUNERE FALSE ELLER TRUE

//FORSLAG 2
if($User->CheckUser("Brugernavn","Password")){
echo "Du er logget ind";
//SAET EVT SESSIONS...
}else{
echo "Du er ikke logget ind...";
}
?>

PHP kode 

 function connect() {
     $mysql = new mysqli('localhost', 'root', '', 'rapcom2') or die('Der var et problem med at connecte til databasen');
     return $mysql;
 }