Phalcon Paginator with full URI

Paginator.php

<?php

use Phalcon\Paginator\Adapter\Model;
use Phalcon\Http\Request;

class Paginator extends Phalcon\Paginator\Adapter\Model {

    public function getPaginate($page_param = false) {
        if(!$page_param) {
            $page_param = "page";
        }

        $paginate = parent::getPaginate();

        $request   = new Request();
        $uri       = $request->getURI();
        $separator = (strpos($uri, "?") !== false) ? "&$page_param=" : "?$page_param=";
        $pos       = strrpos($uri, "$page_param=");

        if($pos !== false) {
            $uri = substr($uri, 0, $pos - 1);
        }

        $before = ($paginate->current !== $paginate->first) ? $paginate->current - 1 : false;
        $next   = ($paginate->current !== $paginate->last) ? $paginate->current + 1 : false;

        $paginate->before = ($before !== false) ? $uri.$separator.$before : "#";
        $paginate->next   = ($next !== false) ? $uri.$separator.$next : "#";
        $paginate->first  = ($paginate->first !== $paginate->current) ? $uri.$separator.$paginate->first : "#";
        $paginate->last   = ($paginate->last !== $paginate->current) ? $uri.$separator.$paginate->last : "#";

        return $paginate;
    }
}