WordPress Plugin Development: Build Your First Plugin

WordPress plugin development allows you to extend WordPress functionality without modifying core files. Plugins can add new features, integrate third-party services, or customize WordPress behavior.

What is a WordPress Plugin?

A plugin is a package of code that extends WordPress functionality. Unlike themes which control appearance, plugins add new features and capabilities.

Plugin File Structure

A basic plugin needs at minimum one PHP file with a header comment:

Plugin Header Requirements

Every plugin must start with a header comment:

<?php
/*
Plugin Name: My Custom Plugin
Description: Adds custom functionality
Version: 1.0.0
Author: Your Name
*/

Creating Your First Plugin

function my_dashboard_widget() {
    echo '<p>Welcome!</p>';
}

function add_my_widget() {
    wp_add_dashboard_widget(
        'my_widget',
        'My Widget',
        'my_dashboard_widget'
    );
}
add_action('wp_dashboard_setup', 'add_my_widget');

Best Practices

• Use meaningful file names
• Validate all input
• Follow WordPress coding standards