Improving validation for snews rss feeds (3)

A final (hopefully) third fix was necessary for snews rss_function. At my site http://www.keramik-werkhof.de I use links and images which use “relative” paths, e.g. <img src="uploads/images .. instead of <img src="http://www.domain.de/uploads/images … This is some the w3c validator does not accept in rss feeds. So how to make sure the full path is used in links and images inside the description of rss content. Well, I came across a function in drupal which fixes this, atleast for links. I had to modify the regex a tiny bit to recognize images aswell (added a dot in the ([A-Za-z0-9) section . So here we go:

find the rss_content function and above it, add the following new function:
function rss_relative_links($description) {
// replace all links starting with '/'
$regexp = "/\b(href|src)(\s*=\s*['\"])([\/][A-Za-z0-9.\/]*)(['\"])/";
$description = preg_replace($regexp, '$1$2'. _SITE. '$3$4', $description);
// replace all relative links not starting with '/'. Absolute links are not matched,
// since ':' is not in the capture pattern.
$regexp = "/\b(href|src)(\s*=\s*['\"])([^\/][A-Za-z0-9.\/]*)(['\"])/";
$description = preg_replace($regexp, '$1$2'. _SITE. '$3$4', $description);
return $description;
}

Then in the function rss_content find:
$link = _SITE.$categorySEF.$articleSEF.'/'.$comment_link;

and add a new line above it with the following:
$text = rss_relative_links($text);