[_ck_]

Okay this one is testing working.

For anyone else that wants to use this, you have to replace the domain name by hand. It’s hardcoded for speed, sorry.

All other target=”_blank” plugins should be uninstalled. Any existing links with target=”_blank” will be left in place for performance since target is not added by bbPress by default.

<?php

/*

Plugin Name: Target Nofollow External Only

Description:  append target="_blank" and rel="nofollow" only on external links

Plugin URI:

Author:  _ck_

Version: 0.0.1

*/



add_filter('post_text', 'target_nofollow_external_only',999);	// unfortunately we have to do this on every page load and not in pre_post



function target_nofollow_external_only( $text ) {

$domain="travel-writers-exchange.com";	// domain to exclude from target and nofollow

$text = preg_replace('|<a (.*)rel=['"]nofollow['"](.+)?>|iU','<a $1$2>', $text);	// strip ALL nofollow

$text = preg_replace('|<a (?[^>]+http//))(?!([^>]+'.$domain.'))(.+)>|iU', '<a $3 rel="nofollow" target="_blank">', $text);  // add back in when needed

return $text;

}

?>

I’m not happy about the performance of this technique because it has to be done in post_text for every time a page is displayed, but there’s no other easy way around bbPress/WordPress’s unfortunate use of make_clickable with hardcoded “nofollow” in post_text.