Model-Data-User

class User extends elDB
{
    private $username;
    private $password;

    public function setUsername($value)
    {
      $this->username = _replaceSq($value);
    }
     public function setPassword($value)
    {
      $this->password = _md5(trim($value));
    }

    public function login()
    {
        // check username dulu
        $r    = $this->checkId("id_user","t_user","username",$this->username);
        // jika ada
        if ($r)
        {
            // check username dan password
            $this->setQuery("select id_user from t_user where username='".$this->username."' and pass='".$this->password."' limit 1");

            return $this->getCount() ? true : false;
        }
        else
        {
            return false;
        }
    }

    public function register()
    {
        // check username dulu
        $checkusername    = $this->checkId("id_user","t_user","username",$this->username );

        // jika belum ada
        if (! $checkusername)
        {
            // maka masukkan kedatabase
            $r = $this->insert("t_user","username",$this->username
                                       ,"pass",$this->password);

            return $r ? true : false;
        }
        else
        {
            return false;
        }
    }

}