vijinho / kohana2-legacy

    public static function auto_link_urls($text)

    {

        // Finds all http/https/ftp/ftps links that are not part of an existing html anchor

        if (preg_match_all('~\b(?<!href="|">)(?:ht|f)tps?://\S+(?:/|\b)~i', $text, $matches)) {

            foreach ($matches[0] as $match) {

                // Replace each link with an anchor

                $text = str_replace($match, html::anchor($match), $text);

            }

        }

        // Find all naked www.links.com (without http://)

        if (preg_match_all('~\b(?<!://)www(?:\.[a-z0-9][-a-z0-9]*+)+\.[a-z]{2,6}\b~i', $text, $matches)) {

        }

        // Find all naked www.links.com (without http://)

        if (preg_match_all('~\b(?<!://)www(?:\.[a-z0-9][-a-z0-9]*+)+\.[a-z]{2,6}\b~i', $text, $matches)) {

            foreach ($matches[0] as $match) {

                // Replace each link with an anchor

                $text = str_replace($match, html::anchor('http://'.$match, $match), $text);

            }

        }

        return $text;

    }

        // Finds all email addresses that are not part of an existing html mailto anchor

        // Note: The "58;" negative lookbehind prevents matching of existing encoded html mailto anchors

        //       The html entity for a colon (:) is : or : or : etc.

        if (preg_match_all('~\b(?<!href="mailto:|">|58;)(?!\.)[-+_a-z0-9.]++(?<!\.)@(?![-.])[-a-z0-9.]+(?<!\.)\.[a-z]{2,6}\b~i', $text, $matches)) {

            foreach ($matches[0] as $match) {

                // Replace each email with an encoded mailto

                $text = str_replace($match, html::mailto($match), $text);

            }

        }

        return $text;

    }