WordPress Plugin

This library is WordPress plugin singleton base class with methods to get data from plugin's header fields.

Installation

composer require piotrpress/wordpress-plugin

Usage

/**
 * Plugin Name:       Example Plugin
 * Plugin URI:        https://example.com/plugin/
 * Description:       Example Plugin description.
 * Version:           1.0.0
 * Requires at least: 5.9
 * Requires PHP:      7.4
 * Author:            John Smith
 * Author URI:        https://example.com/plugin/author/
 * License:           GPL v3 or later
 * License URI:       https://www.gnu.org/licenses/gpl-3.0.txt
 * Update URI:        https://example.com/plugin/update/
 * Text Domain:       example-plugin
 * Domain Path:       /languages
 */

require __DIR__ . '/vendor/autoload.php';

use PiotrPress\WordPress\Plugin;

class Example extends Plugin {
    public function activation() : void {}
    public function deactivation() : void {}
}

Example::setInstance( __FILE__ );

echo Example::getName();

NOTE: Plugin's translations are loaded automatically according to Text Domain and Domain Path plugin's header fields.

Methods

Basic static methods handling plugin's default header fields

• getName() - returns string with the name of the plugin from Plugin Name header field
• getPluginURI() - returns string with the home page of the plugin or empty string if Plugin URI header field is not set
• getVersion() - returns string with the current version number of the plugin or empty string if Version header field is not set
• getDescription() - returns string with a short description of the plugin or empty string if Description header field is not set
• getAuthor() - returns string with the name of the plugin author or empty string if Author header field is not set
• getAuthorURI() - returns string with the website of the plugin's author or empty string if Author URI header field is not set
• getTextDomain() - returns string with the gettext text domain of the plugin or directory name of the plugin if Text Domain header field is not set
• getDomainPath() - returns string with the path to translations directory or empty string if Domain Path header field is not set
• getNetwork() - returns bool whether the plugin can only be activated network-wide according to Network header field
• getRequiresWP() - returns string with the lowest WordPress version that the plugin will work on or empty string if Requires at least header field is not set
• getRequiresPHP() - returns string with the minimum required PHP version or empty string if Requires PHP header field is not set
• getUpdateURI() - returns string with third-party plugin's update server or empty string if Update URI header field is not set

Additional static methods handling plugin's paths

• getSlug() - returns string with the directory name of the plugin
• getFile() - returns string with the path to main plugin's file
• getDir() - returns string with the path to plugin's directory
• getUrl() - returns string with the url to plugin's directory
• getBaseName() - returns string with the basename of the plugin

Inherited Singleton's static methods

• setInstance() - executes __construct() and can be called only once, otherwise Exception will be thrown
• getInstance() - returns null before setInstance() successfully call
• issetInstance() - returns true if instance exists, false otherwise
• unsetInstance() - unsets instance

Abstract methods handling plugin's de/activation

• activation() - executed while plugin activation
• deactivation() - executed while plugin deactivation

Handling custom plugin's header fields

1. Add WordPress support for extra plugin's header fields using extra_plugin_headers filter:

add_filter( 'extra_plugin_headers', function () {
    return [ 'License', 'License URI' ];
} );

2. Add methods to handle extra plugin's header fields:

class Example extends Plugin {
    public static function getLicenseURI() {
        return self::get( 'License URI' );
    }
}

NOTE: get prefixed methods are automagically created for plugin's header fields that meet valid function name rules. e.g. getLicense() method.

Requirements

PHP >= 7.4 version.

License

GPL 3.0