PreprocessCommentContentin? WordPress

Iveputagreatamountofeffortintomakingsurethe? Commentsystemonthisblogisfast? Andfeature-filled .? ThecommentsystemisAJAX-basedsoyoudontneedtoworryaboutpagerefreshes .? YoucanalsopostlinkstoGitHubgists, CodeP

Ive put a great amount of effort into making sure? Comment system on this blog is fast? And feature-filled .? The comment system is AJAX-based so you dont need to worry about page refreshes .? You can also post links to GitHub gists, CodeP

I 've put a great amount of effort into making sure? Comment system on this blog is fast? And feature-filled .? The comment system is AJAX-based so you don't need to worry about page refreshes .? You can also post links to GitHub gists, CodePen pens, and JSFiddle fiddles and see them rendered within the comment .? Those tasks I accomplish? After a comment has been registered in? System .? But what if you want? Modify comment content before it is processed, and subsequently marked as SPAM or scrubbed? ? That's super easy with WordPress hooks!

The PHP

Thepreprocess_commentHook allows us to get at the comment data before it is processed .? Here is how I use this hook, wrapping?`text`Strings in elements and encoding angle characters in

?elements:
// Manage comment submissionsfunction preprocess_new_comment($commentdata) {// Replace `code` with code$commentdata['comment_content'] = preg_replace("/`(.*)`/Um", "$1", $commentdata['comment_content']);// Ensure that code inside pre's is allowedpreg_match_all("/(.*)<\/pre>/", $commentdata['comment_content'], $pre_matches); // $2foreach($pre_matches as $match) {$immediate_match = str_replace(array('<', '>'), array('<', '>'), $match[2]);$commentdata['comment_content'] = str_replace($match[2], $immediate_match, $commentdata['comment_content']);}// Returnreturn $commentdata;}add_action('preprocess_comment', 'preprocess_new_comment');
This snippet?should be added to functions.php, as you would expect of a WordPress theme enhancement.
I love the WordPress hook system — it makes the CMS incredibly powerful and?customizable. ?I also use this hook to prevent WordPress comment SPAM. ?And since many users place HTML code in my comments, it’s important?I encode those angle characters properly. ?In the end, you never know what your user will submit and what each site will accept — use this?WordPress hook to take control!
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