Wordpress Hack » Inserting rel nofollow on links in all categories…
I wanted to add rel='external nofollow' onto every Link in every Category that didn't have an explicit rel attribute defined. I looked though the Wordpress Codex but found no Plugin Hooks to do it so I broke out the source code.
Somewhere down the chain the link markup "<a ..." is generated in the function get_links() found in /wp-include/links.php (approx line 142). I added two lines of code shown below and it works a treat.
Before
PHP:
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$rel = $row->link_rel;
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if ($rel != '') {
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$rel = " rel='$rel'";
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}
After
PHP:
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$rel = $row->link_rel;
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if ($rel != '') {
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$rel = " rel='$rel'";
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} else {
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$rel = " rel='external nofollow'";
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}
