How to Deny Comment No Referrer Requests in WordPress

Snippets by IsItWP

Are you looking for a way to check the referrer when a user posts a comment to verify if they are not a BOT? While there’s probably a plugin for this, we have created a quick code snippet that you can use to deny comment no referrer requests in WordPress.


All you have to do is add this code to your theme’s functions.php file or in a site-specific plugin:

function check_referrer() {
   if (!isset($_SERVER['HTTP_REFERER']) || $_SERVER['HTTP_REFERER'] == “”) {
       wp_die( __(‘Please enable referrers in your browser, or, if you\’re a spammer, bugger off!’) );
add_action(‘check_comment_flood’, ‘check_referrer’);

Thanks to Joost de Valk for this code snippet.

Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly add code snippets in WordPress, so you don’t accidentally break your site.

If you liked this code snippet, please consider checking out our other articles on the site like: 7 best WordPress calendar plugins and how to use Google Optimize in WordPress.

Comments  Leave a Reply

  1. WordPress deny comment no referrer requests – wpsnipp.com WordPress code snippets for your blog…

    Adding this PHP code to the functions.php will check the referrer when a user posts a comment to ensure they are not a BOT….

Add a Comment

We're glad you have chosen to leave a comment. Please keep in mind that all comments are moderated according to our privacy policy, and all links are nofollow. Do NOT use keywords in the name field. Let's have a personal and meaningful conversation.

WordPress Launch Checklist

The Ultimate WordPress Launch Checklist

We've compiled all the essential checklist items for your next WordPress website launch into one handy ebook.
Yes, Send Me the Free eBook!