How to create a WordPress Plugin for beginners

WordPress is an incredibly versatile platform that allows users to extend its functionality through plugins. In this article, we will learn how to create a basic plugin from scratch, step by step, with code examples in both Spanish and English.

1: Setting up the Development Environment.

Before we begin, we need to have a development environment set up. Make sure you have a web server with WordPress installed and ready to use.


2: Basic Plugin Structure.

Let’s start by creating the basic structure of our plugin. Create a folder in the WordPress plugins directory, and inside it, create a main file with the plugin information.

// my-plugin/my-plugin.php

Plugin Name: My Plugin
Description: A brief plugin description.
Version: 1.0
Author: Your Name
Author URI:
License:      GPL2
License URI:
Text Domain:  wp-tutorial
Domain Path:  /languages

// Plugin code goes here



3: Adding Functionality.

Let’s add basic functionality to the plugin, for example, displaying a custom message in the admin bar.

// my-plugin/my-plugin.php

// ... (previous code)

// Function to display the message in the admin bar
function show_admin_message() {
    echo '<div class="notice notice-success is-dismissible">
        <p>Hello, this is your custom message.</p>

// Hook to call the function
add_action('admin_notices', 'show_admin_message');

// ... (subsequent code)


4: Plugin Activation and Deactivation.

Let’s add hooks to execute functions when the plugin is activated or deactivated.

// my-plugin/my-plugin.php

// ... (previous code)

// Function to perform actions when the plugin is activated
function activate_my_plugin() {
    // Activation actions here

// Function to perform actions when the plugin is deactivated
function deactivate_my_plugin() {
    // Deactivation actions here

// Activation and deactivation hooks
register_activation_hook(__FILE__, 'activate_my_plugin');
register_deactivation_hook(__FILE__, 'deactivate_my_plugin');

// ... (subsequent code)

5: Hooks.

WordPress is full of hooks to be able to manipulate functionality or content from a plugin or theme. For this example, we will manipulate the content of each post and replace the word wordpress with WordPress, which is the correct way to write this word.
function replace_wordpress_word( $content = '' ) {
    return str_replace( 'wordpress', 'WordPress', $content );

add_filter( 'the_content', 'replace_wordpress_word' );



This article provides a basic introduction on how to create a plugin for WordPress. You can expand and customize this foundation according to your specific needs. I hope you find this tutorial helpful!

Remember to adjust and customize the code according to the specific requirements of your plugin. Good luck with your development!

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