woocommerce/woocommerce.php

<?php
/**
 * Plugin Name: WooCommerce
 * Plugin URI: https://woocommerce.com/
 * Description: An eCommerce toolkit that helps you sell anything. Beautifully.
 * Version: 4.4.0-dev
 * Author: Automattic
 * Author URI: https://woocommerce.com
 * Text Domain: woocommerce
 * Domain Path: /i18n/languages/
 * Requires at least: 5.2
 * Requires PHP: 7.0
 *
 * @package WooCommerce
 */

defined( 'ABSPATH' ) || exit;

use Automattic\WooCommerce\Tools\DependencyManagement\ObjectContainer;

if ( ! defined( 'WC_PLUGIN_FILE' ) ) {
	define( 'WC_PLUGIN_FILE', __FILE__ );
}

// Load core packages and the autoloader.
require __DIR__ . '/src/Autoloader.php';
require __DIR__ . '/src/Packages.php';

if ( ! \Automattic\WooCommerce\Autoloader::init() ) {
	return;
}
\Automattic\WooCommerce\Packages::init();

// Define a simple autoloader for the object container to work.
// Function grabbed from https://container.thephpleague.com/3.x
spl_autoload_register(
	function ( $class ) {
		$prefix   = 'Automattic\\WooCommerce\\';
		$base_dir = __DIR__ . '/src/';
		$len      = strlen( $prefix );
		if ( strncmp( $prefix, $class, $len ) !== 0 ) {
			// no, move to the next registered autoloader
			return;
		}
		$relative_class = substr( $class, $len );
		$file           = $base_dir . str_replace( '\\', '/', $relative_class ) . '.php';
		if ( file_exists( $file ) ) {
			require $file;
		}
	}
);

// Include the main WooCommerce class.
if ( ! class_exists( 'WooCommerce', false ) ) {
	include_once dirname( WC_PLUGIN_FILE ) . '/includes/class-woocommerce.php';
}

// Initialize dependency injection.
ObjectContainer::init();

/**
 * Returns the main instance of WC.
 *
 * @since  2.1
 * @return WooCommerce
 */
function WC() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
	return ObjectContainer::get_instance_of( WooCommerce::class );
}

// Global for backwards compatibility.
$GLOBALS['woocommerce'] = WC();