ds

class databaseConnection {
    protected $db_name = "url";
    protected $db_user = "root";
    protected $db_pass = "";
    protected $db_host = "localhost";

    public function __construct() {
        try {
            $db = new PDO("mysql:host=".$this->db_host."; dbname=".$this->db_name, $this->db_user, $this->db_pass);
            $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        }
        catch(PDOException $e) {
            echo $e->getMessage();
        }
    }
}

$db = new databaseConnection();

$query = $db->prepare('SELECT * FROM users');
$query->execute();
print('Jurgen, je kan niks! Hier zijn al je users:');
$results = $query->fetchAll();
print_r($results);