Horde_Registry::linkByPackage PHP Method

    public function linkByPackage($app, $call, $args = array(), $extra = '')
    {
        $links = ($api_ob = $this->_loadApi($app)) ? $api_ob->links() : array();
        /* Make sure the link is defined. */
        if (!isset($links[$call])) {
            throw new Horde_Exception('The link "' . $call . '" is not defined in ' . $app . '\'s API.');
        }
        /* Initial link value. */
        $link = $links[$call];
        /* Fill in html-encoded arguments. */
        foreach ($args as $key => $val) {
            $link = str_replace('%' . $key . '%', htmlentities($val), $link);
        }
        $link = $this->applicationWebPath($link, $app);
        /* Replace htmlencoded arguments that haven't been specified with
           an empty string (this is where the default would be substituted
           in a stricter registry implementation). */
        $link = preg_replace('|%.+%|U', '', $link);
        /* Fill in urlencoded arguments. */
        foreach ($args as $key => $val) {
            $link = str_replace('|' . Horde_String::lower($key) . '|', urlencode($val), $link);
        }
        /* Append any extra, non-standard arguments. */
        if (is_array($extra)) {
            $extra_args = '';
            foreach ($extra as $key => $val) {
                $extra_args .= '&' . urlencode($key) . '=' . urlencode($val);
            }
        } else {
            $extra_args = $extra;
        }
        $link = str_replace('|extra|', $extra_args, $link);
        /* Replace html-encoded arguments that haven't been specified with
           an empty string (this is where the default would be substituted
           in a stricter registry implementation). */
        $link = preg_replace('|\\|.+\\||U', '', $link);
        return $link;
    }