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nofollow tag

 
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lynn



Joined: 04 Jul 2003
Posts: 66
Location: USA
PostPosted: Sat Jan 22, 2005 4:00 pm    Post subject: nofollow tag Reply with quote
From Yahoo News:

Google Inc., Microsoft Corp.'s MSN division, Yahoo Inc. (Nasdaq:YHOO - news) and Six Apart Ltd. announced late Tuesday that they are supporting a tag called "nofollow" to exclude links in blog comments from search-engine crawlers and to prevent spam posts from influencing search rankings.

The rest of the article here: http://story.news.yahoo.com/news?tmpl=story&cid=1738&ncid=1738&e=7&u=/zd/20050118/tc_zd/142858

Sounds like a good idea. How do we do this in B2?
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stevem



Joined: 15 Mar 2003
Posts: 365
PostPosted: Sat Jan 22, 2005 9:07 pm    Post subject: Reply with quote
I think this works. Try it and check View Source to see that it really does.

In b2template.functions.php look for
Code:
function make_clickable($text) { // original function: phpBB, extended here for AIM & ICQ
    $ret = " " . $text;
    $ret = preg_replace("#([\n ])([a-z]+?)://([^, <>{}\n\r]+)#i", "\\1<a href=\"\\2://\\3\" target=\"_blank\">\\2://\\3</a>", $ret);

In that last line add
Code:
rel=\"nofollow\"
so it reads
Code:
    $ret = preg_replace("#([\n ])([a-z]+?)://([^, <>{}\n\r]+)#i", "\\1<a href=\"\\2://\\3\" target=\"_blank\" rel=\"nofollow\">\\2://\\3</a>", $ret);

Then do the same thing 3 lines further down so that
Code:
    $ret = preg_replace("#([\n ])www\.([a-z0-9\-]+)\.([a-z0-9\-.\~]+)((?:/[^,< \n\r]*)?)#i", "\\1<a href=\"http://www.\\2.\\3\\4\" target=\"_blank\">www.\\2.\\3\\4</a>", $ret);

becomes
Code:
    $ret = preg_replace("#([\n ])www\.([a-z0-9\-]+)\.([a-z0-9\-.\~]+)((?:/[^,< \n\r]*)?)#i", "\\1<a href=\"http://www.\\2.\\3\\4\" target=\"_blank\" rel=\"nofollow\">www.\\2.\\3\\4</a>", $ret);
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