Kod źródłowy do wpisu o tworzeniu wtyczek do wordpressa znajdującego się pod adresem: https://wpblog.pl/tworzenie-wlasnej-wtyczki-do-wordpressa/

action.php

<?php
/*
 * Plugin Name: Sample Extension
 * Plugin URI: http://wpblog.pl
 * Description: Sample Extension to show wordpress plugins functionality
 * Version: 1.0
 * Author: WP Blog
 * Author URI: http://wpblog.pl
*/

add_action('wp_footer', function() {
        echo "Hello from Sample Plugin!";
});

safe.php

<?php
defined('ABSPATH') or die('Execution not allowed!');

// Kod wtyczki

sample-plugin.php

<?php
/*
 * Plugin Name: Sample Extension
 * Plugin URI: http://wpblog.pl
 * Description: Sample Extension to show wordpress plugins functionality
 * Version: 1.0
 * Author: WP Blog
 * Author URI: http://wpblog.pl
*/

simple-header.php

<?php
/*
 * Plugin Name: Sample Extension
 */