How to use pre_comment_content filter in WordPress

WordPress hooks are a powerful way to customize and extend your site’s functionality. Among these, the pre_comment_content filter lets you modify comment content before it’s set. Using this filter is quite straightforward, and we usually recommend creating a custom WordPress Plugin instead of adding code directly to your theme’s functions.php file. This way, your changes are preserved even when you update your theme.

Now, let’s dive into some live examples to see how you can harness the power of the pre_comment_content filter.

Example 1: Basic Usage

This example demonstrates how to modify comment content using the pre_comment_content filter.

    function weplugins_modify_pre_comment_content($comment_content) { 
        // Update the $comment_content variable according to your website requirements.
        return $comment_content; 
    }
    // Add the filter
    add_filter("pre_comment_content", "weplugins_modify_pre_comment_content", 10, 1);
    

Example 2: Conditional Modification

In this example, we modify the comment content conditionally. You can tailor this to meet specific requirements for your site.

    function weplugins_conditional_pre_comment_content($comment_content) {
        if (strpos($comment_content, 'specific word') !== false) {
            $comment_content .= ' - Modified by WePlugins!';
        }
        return $comment_content;
    }
    // Add the filter
    add_filter("pre_comment_content", "weplugins_conditional_pre_comment_content", 10, 1);
    

Example 3: Removing a Hook Callback

Sometimes, you might need to remove a registered hook. Here’s how you can remove the pre_comment_content filter.

    remove_filter("pre_comment_content", "weplugins_modify_pre_comment_content", 10, 1);
    

Make sure to provide the same callback function name, priority, and number of arguments when removing the hook callback.

Contact Us

If you need any help customizing your WordPress site or using this hook, feel free to reach out to us. Contact WePlugins for expert assistance.