A Beginner’s Guide to Building a WooCommerce Plugin

WooCommerce is a powerful and widely-used e-commerce platform built on top of WordPress. The flexibility and extensibility of WooCommerce make it a popular choice for online store owners. One of the key features of WooCommerce is its ability to support custom plugins that can enhance or add new functionalities to your online store. In this article, we will walk you through the process of building a simple WooCommerce plugin, even if you’re a beginner.


To follow this guide, you should have:

  1. A basic understanding of PHP, HTML, CSS, and JavaScript.
  2. Familiarity with WordPress and WooCommerce.
  3. A local development environment with WordPress and WooCommerce installed.

Step 1: Plan your plugin

Before you start building your plugin, it’s essential to have a clear understanding of the functionality you want to add or modify. For this tutorial, we will create a simple plugin that adds a custom message on the product page to encourage users to leave a review.

Step 2: Create a plugin folder and file

  1. In your WordPress installation, navigate to the ‘wp-content/plugins’ folder.
  2. Create a new folder named ‘custom-review-message’.
  3. Inside the ‘custom-review-message’ folder, create a new PHP file named ‘custom-review-message.php’.

Step 3: Define your plugin

In the ‘custom-review-message.php’ file, add the following code to define your plugin:

* Plugin Name: Custom Review Message for WooCommerce
* Plugin URI:
* Description: This plugin adds a custom message to the product page, encouraging users to leave a review.
* Version: 1.0
* Author: Your Name
* Author URI:
* License: GPL-2.0+
* License URI:
* WC requires at least: 3.0.0
* WC tested up to: 5.9.0

if (!defined('ABSPATH')) {
exit; // Exit if accessed directly.

Step 4: Add the custom message

To add a custom message to the product page, we will use WooCommerce’s ‘woocommerce_after_single_product_summary’ hook. Add the following code to your ‘custom-review-message.php’ file:

function custom_review_message() {
echo '<div class="custom-review-message">';
echo '<p>Enjoyed our product? Leave a review and let us know your thoughts!</p>';
echo '</div>';

add_action('woocommerce_after_single_product_summary', 'custom_review_message', 15);

Step 5: Style the custom message

To make the custom message look more appealing, add some CSS to your plugin. First, create a new folder called ‘assets’ inside the ‘custom-review-message’ folder. Inside the ‘assets’ folder, create a new file called ‘custom-review-message.css’, and add the following CSS:

.custom-review-message {
background-color: #f8f8f8;
border: 1px solid #e5e5e5;
padding: 20px;
margin-top: 20px;
font-size: 1.1em;
text-align: center;

Now, enqueue the CSS file in your plugin by adding the following code to the ‘custom-review-message.php’ file:

function custom_review_message_enqueue_styles() {
wp_enqueue_style('custom-review-message', plugin_dir_url(__FILE__) . 'assets/custom-review-message.css');

add_action('wp_enqueue_scripts', 'custom_review_message_enqueue_styles');


In this beginner’s guide, we have walked you through the process of building a simple WooCommerce plugin that adds a custom message to the product page, encouraging users to leave a review. By following these steps, you have learned the basics of creating a WooCommerce plugin, defining its functionality, adding custom content with hooks, and styling the output with CSS. With this knowledge, you can now begin to explore more advanced plugin development techniques and create more complex and feature-rich WooCommerce plugins tailored to your specific needs. Remember, the key to successful plugin development is planning, testing, and iterating. Keep experimenting and refining your skills, and soon you’ll be able to enhance your online store with custom-built plugins that cater to your unique requirements. Happy coding!