Doku_Handler::externallink PHP Method

    function externallink($match, $state, $pos)
    {
        $url = $match;
        $title = null;
        // add protocol on simple short URLs
        if (substr($url, 0, 3) == 'ftp' && substr($url, 0, 6) != 'ftp://') {
            $title = $url;
            $url = 'ftp://' . $url;
        }
        if (substr($url, 0, 3) == 'www' && substr($url, 0, 7) != 'http://') {
            $title = $url;
            $url = 'http://' . $url;
        }
        $this->_addCall('externallink', array($url, $title), $pos);
        return true;
    }