How to allow tags in Wordpress comments unobtrusively
Scenario: I am using the tinymcecomments plugin to give some formatting capabilities to commenters.
With the latest WP update I realised the span tag was removed from comments; colors attributes are filtered by the kses filter.
Hum.
After investigating I come across this suggestion in the Codex:
Acceptance of HTML tags in the comments field is managed in the file kses.php, located in the wp-includes folder.
Open this file in a text editor, and locate the list of HTML tags near the top of the file. Each HTML tag is listed on a separate line, in the construction of a PHP array of allowed tags. Lines which begin with // are commented-out, or disabled, so lines which begin with // designate HTML tags that are not allowed in comments.
To stop people from posting HTML in comments, edit your kses.php file as desired to allow or disallow specific HTML tags in comments, by adding // to the very beginning of the appropriate lines of the list. To exclude all HTML tags, comment out all lines which allow HTML tags. Be sure to save your file when done.
That’s a start but hey, is the Codex really suggesting that I alter the WP core? Next update my all precious settings will go away. C’mon, we can do better than that!
In the kses source code I find this:
if (!defined('CUSTOM_TAGS')) define('CUSTOM_TAGS', false); if (!CUSTOM_TAGS) { etc
So basically I can redefine all the allowed tags structure in a constant. Not bad. But hey, do I really want to redefine both the $allowedposttags and the $allowedtags variables? Naaah…
So I scavenged in the source code and I came across a fit filter. I wrote a little function for my functions.php file; needless to say, this could have gone into a plugin.
add_filter('preprocess_comment','fa_allow_tags_in_comments'); function fa_allow_tags_in_comments($data) { global $allowedtags; $allowedtags['span'] = array('style'=>array()); $allowedtags['p'] = array(); return $data; }
See? Much more concise than overwriting the variables. And more future-proof: if subsequent versions of Wordpress change the variable there is no constant barring the changes.
Cheers,
Davide
2010-05-04 at 7.59 am
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Let’s see if some tags work:
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Let’s try again: Emphasized text<br/> Strong text<br/>
<br/>Computer code text<br/> Keyboard text<br/> Citation<br/>strike<br/>del<br/> <br/> Italic text<br/> Bold text<br/> Shaming Private RyanThis ones got Breaks
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It seems that if you allow the html tag for code, WP still strips the html code, so you’d need a plugin, right? But then if you uninstall that plugin, you have code saved that can break the rest of your page. You’d think nobody would do that, but hey I just did because I have to disable plugins sometimes to isolate problems, and in that case, disabling causes another problem.
So, what I mean to ask is, do you think you could expand on this topic, so theme designers can make an informed choice here about what to include? For themes where we won’t be the admin?
Thanks.
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