How To Add Syntax Highlighting In WordPress Comments

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WordPress is one of the most widely used content management systems (CMS) available today. One of its core features is the ability to allow comments on posts and pages, which can help to increase engagement and interaction with your audience. However, by default, WordPress does not support syntax highlighting in comments, which can be a problem if you run a technical blog or have a community of developers who like to share code snippets. In this article, we will explain how to add syntax highlighting in WordPress comments so that your readers can easily understand and interpret code snippets.

Steps to Add Syntax Highlighting in WordPress Comments

Install and activate a syntax highlighting plugin

The first step to adding syntax highlighting in WordPress comments is to install and activate a plugin that supports syntax highlighting. There are many plugins available, but we recommend WP-Syntax, which is free and easy to use.

Install and activate a syntax highlighting plugin

Customize the plugin settings

Once you have installed and activated WP-Syntax, you can customize the plugin settings to suit your needs. For example, you can choose the color scheme, the programming languages that you want to highlight, and the default font size.

Enable syntax highlighting in comments

To enable syntax highlighting in comments, you need to edit your WordPress theme’s comments.php file. To do this, go to Appearance > Theme Editor in your WordPress dashboard, and then click on the comments.php file. Look for the comment_text() function, and then replace it with the following code:

<?php if (function_exists('wp_syntax')): ?> 

<?php echo wp_syntax($comment->comment_content); ?>

<?php else: ?>

<?php echo $comment->comment_content; ?>

<?php endif; ?>

Save the changes, and then refresh your website to see the syntax highlighting in action.


Adding syntax highlighting in WordPress comments can help to improve the readability and understanding of code snippets, which can be particularly useful for technical blogs and communities. By following the steps outlined in this article, you can easily add syntax highlighting to your WordPress comments using the WP-Syntax plugin. With this feature enabled, your readers will be able to easily read and interpret code snippets, which can help to increase engagement and interaction on your website.

Things To Consider When Adding Syntax Highlighting In WordPress Comments

Here are some additional considerations to keep in mind when adding syntax highlighting to WordPress comments:

Plugin Compatibility: When choosing a syntax highlighting plugin, make sure that it is compatible with your current WordPress version and any other plugins you may have installed. It’s always a good idea to test the plugin on a staging site before implementing it on your live site.

Performance: Syntax highlighting can be resource-intensive, so be mindful of the impact it may have on your website’s performance. Choose a lightweight plugin and consider caching the highlighted code snippets to reduce the load on your server.

Security: Syntax highlighting plugins can be a potential security risk if they are not properly maintained or contain vulnerabilities. Make sure to keep your plugin and WordPress version up to date, and only install plugins from reputable sources.

Accessibility: Ensure that your syntax highlighting plugin is accessible to all users, including those who use assistive technology like screen readers. Make sure that the highlighted code is readable even without color contrast, and consider adding descriptive text to code snippets to provide context.

By considering these factors, you can ensure that syntax highlighting in WordPress comments is a useful and accessible feature for your readers.

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