Simple autoloader for WordPress Must-Use plugins. The loader assumes plugins use the format `{plugin-name}\{plugin-name}`.php for their core file. If not, they're skipped.

autoloader.php

<?php
/**
 * MU-Plugin Autoloader
 *
 * @author Eric Mann <[email protected]>
 * @license MIT
 * @copyright 2015 Eric Mann
 */
 
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

$paths = scandir( dirname( __FILE__ ) );
$paths = array_diff( $paths, array( '..', '.' ) );

foreach( $paths as $maybe_plugin ) {
	if ( strpos( $maybe_plugin, '.php' ) != 0 ) {
		continue;
	}

	// Attempt to get the loader file.
	$core_file = WPMU_PLUGIN_DIR . "/{$maybe_plugin}/{$maybe_plugin}.php";

	if ( file_exists( $core_file ) ) {
		require_once $core_file;
	}
}