public function getPrev()
    {
        if ($this->getPage() != $this->getFirstPage()) {
            $prev = $this->getPage() - 1;
        } else {
            $prev = false;
        }

        return $prev;
    }
public function getPrev()
    {
        if ($this->getPage() != $this->getFirstPage()) {
            $prev = $this->getPage() - 1;
        } else {
            $prev = false;
        }

        return $prev;
    }
public function getPrev ( ) { if ( $ this -> getPage ( ) != $ this -> getFirstPage ( ) ) { $ prev = $ this -> getPage ( ) - 1 ; } else { $ prev = false ; } return $ prev ; }
get previous id

@return mixed $prev
get previous id