WordPress at a glance
class is not described

Autoloader{} WC 1.0

This class handles management of the actual PHP autoloader.

No Hooks.

Return

null. Nothing.

Usage

$Autoloader = new Autoloader();
// use class methods

Methods

  1. Container()
  2. is_initializing()
  3. ERROR: no method name found on line ` // phpcs:disable Generic.Commenting.DocComment.MissingShort`
  4. init( $container = null )
  5. ERROR: no method name found on line ` // phpcs:disable Generic.Commenting.DocComment.MissingShort`
  6. ERROR: no method name found on line ` // phpcs:disable Generic.Commenting.DocComment.MissingShort`
  7. ERROR: no method name found on line ` // Note that it's possible this list will include plugins that have since been deactivated, but after a request`

Code of Autoloader{} WC 5.2.2

<?php
class Autoloader {

	/**
	 * Checks to see whether or not the autoloader should be initialized and then initializes it if so.
	 *
	 * @param Container|null $container The container we want to use for autoloader initialization. If none is given
	 *                                  then a container will be created automatically.
	 */
	public static function init( $container = null ) {
		// The container holds and manages the lifecycle of our dependencies
		// to make them easier to work with and increase flexibility.
		if ( ! isset( $container ) ) {
			require_once __DIR__ . '/class-container.php';
			$container = new Container();
		}

		// phpcs:disable Generic.Commenting.DocComment.MissingShort

		/** @var Autoloader_Handler $autoloader_handler */
		$autoloader_handler = $container->get( Autoloader_Handler::class );

		// If the autoloader is already initializing it means that it has included us as the latest.
		$was_included_by_autoloader = $autoloader_handler->is_initializing();

		/** @var Plugin_Locator $plugin_locator */
		$plugin_locator = $container->get( Plugin_Locator::class );

		/** @var Plugins_Handler $plugins_handler */
		$plugins_handler = $container->get( Plugins_Handler::class );

		// The current plugin is the one that we are attempting to initialize here.
		$current_plugin = $plugin_locator->find_current_plugin();

		// The active plugins are those that we were able to discover on the site. This list will not
		// include mu-plugins, those activated by code, or those who are hidden by filtering. We also
		// want to take care to not consider the current plugin unknown if it was included by an
		// autoloader. This avoids the case where a plugin will be marked "active" while deactivated
		// due to it having the latest autoloader.
		$active_plugins = $plugins_handler->get_active_plugins( true, ! $was_included_by_autoloader );

		// The cached plugins are all of those that were active or discovered by the autoloader during a previous request.
		// Note that it's possible this list will include plugins that have since been deactivated, but after a request
		// the cache should be updated and the deactivated plugins will be removed.
		$cached_plugins = $plugins_handler->get_cached_plugins();

		// We combine the active list and cached list to preemptively load classes for plugins that are
		// presently unknown but will be loaded during the request. While this may result in us considering packages in
		// deactivated plugins there shouldn't be any problems as a result and the eventual consistency is sufficient.
		$all_plugins = array_merge( $active_plugins, $cached_plugins );

		// In particular we also include the current plugin to address the case where it is the latest autoloader
		// but also unknown (and not cached). We don't want it in the active list because we don't know that it
		// is active but we need it in the all plugins list so that it is considered by the autoloader.
		$all_plugins[] = $current_plugin;

		// We require uniqueness in the array to avoid processing the same plugin more than once.
		$all_plugins = array_values( array_unique( $all_plugins ) );

		/** @var Latest_Autoloader_Guard $guard */
		$guard = $container->get( Latest_Autoloader_Guard::class );
		if ( $guard->should_stop_init( $current_plugin, $all_plugins, $was_included_by_autoloader ) ) {
			return;
		}

		// Initialize the autoloader using the handler now that we're ready.
		$autoloader_handler->activate_autoloader( $all_plugins );

		/** @var Hook_Manager $hook_manager */
		$hook_manager = $container->get( Hook_Manager::class );

		// When the active and cached plugin lists do not match we should
		// update the cache. This will prevent plugins that have been
		// deactivated from being considered in other requests.
		$hook_manager->add_action(
			'shutdown',
			function () use ( $plugins_handler, $cached_plugins, $was_included_by_autoloader ) {
				// Don't save a broken cache if an error happens during some plugin's initialization.
				if ( ! did_action( 'plugins_loaded' ) ) {
					// Ensure that the cache is emptied to prevent consecutive failures if the cache is to blame.
					if ( ! empty( $cached_plugins ) ) {
						$plugins_handler->cache_plugins( array() );
					}

					return;
				}

				// Load the active plugins fresh since the list we pulled earlier might not contain
				// plugins that were activated but did not reset the autoloader. This happens
				// when a plugin is in the cache but not "active" when the autoloader loads.
				// We also want to make sure that plugins which are deactivating are not
				// considered "active" so that they will be removed from the cache now.
				$active_plugins = $plugins_handler->get_active_plugins( false, ! $was_included_by_autoloader );

				// The paths should be sorted for easy comparisons with those loaded from the cache.
				// Note we don't need to sort the cached entries because they're already sorted.
				sort( $active_plugins );

				// We don't want to waste time saving a cache that hasn't changed.
				if ( $cached_plugins === $active_plugins ) {
					return;
				}

				$plugins_handler->cache_plugins( $active_plugins );
			}
		);

		// phpcs:enable Generic.Commenting.DocComment.MissingShort
	}
}