public function __construct($onupdate = false, $username)
{
parent::__construct($onupdate);
$this->default_username = $username;
}
public function __construct($onupdate = false, $username_constant)
{
parent::__construct($onupdate);
$this->constant = $username_constant;
}
public function __construct($onupdate = false, $ascending = true)
{
parent::__construct($onupdate);
$this->function = $ascending ? 'max' : 'min';
$this->counter = $ascending ? '+1' : '-1';
}
