public function autoload( $class ) {

		$class = strtolower( $class );
		if ( 0 !== strpos( $class, 'llms_' ) && 'lifterlms' !== $class && 'meta_box_field_interface' !== $class ) {
			return;
		}
		$path    = null;
		$fileize = str_replace( '_', '-', $class );
		$file    = 'class-' . $fileize . '.php';

		if ( array_key_exists( $class, $this->non_standard_classes ) ) {
			$path = LLMS_PLUGIN_DIR . $this->non_standard_classes[ $class ];
			$file = null;

		} elseif ( 0 === strpos( $class, 'llms_abstract_' ) ) {
			$path = LLMS_PLUGIN_DIR . 'includes/abstracts/';
			$file = $fileize . '.php';

		} elseif (
			0 === strpos( $class, 'llms_analytics_' ) && false !== strrpos( $class, '_widget', - 7 )
		) {
			$path = LLMS_PLUGIN_DIR . 'includes/admin/reporting/widgets/';
			$file = 'class.llms.analytics.widget.' . substr( $class, 15, - 7 ) . '.php';

		} elseif ( 0 === strpos( $class, 'llms_interface_' ) ) {
			$path = LLMS_PLUGIN_DIR . 'includes/interfaces/';
			$file = $fileize . '.php';

		} elseif (
			0 === strpos( $class, 'llms_metabox_' ) && false !== strrpos( $class, '_field', - 6 )
		) {
			$path = LLMS_PLUGIN_DIR . 'includes/admin/post-types/meta-boxes/fields/';
			$file = 'llms-class-meta-box-' . substr( $fileize, 13, - 6 ) . '.php';

		} elseif ( 0 === strpos( $class, 'llms_table_' ) ) {
			/** @todo Prefix file names with 'class-' */
			$path = LLMS_PLUGIN_DIR . 'includes/admin/reporting/tables/';
			$file = $fileize . '.php';

		} elseif ( 0 === strpos( $class, 'llms_trait_' ) ) {
			$path = LLMS_PLUGIN_DIR . 'includes/traits/';
			$file = $fileize . '.php';
		}

		if ( is_null( $path ) ) {
			foreach ( $this->class_paths as $class_path => $class_name_starts_with ) {
				if ( 0 === strpos( $class, $class_name_starts_with ) ) {
					$path = LLMS_PLUGIN_DIR . $class_path;
					break;
				}
			}
		}

		if ( $path ) {
			if ( is_readable( $path . $file ) ) {
				require_once $path . $file;
				return;
			}

			$file = str_replace( '-', '.', $file );
			if ( is_readable( $path . $file ) ) {
				require_once $path . $file;
				return;
			}
		}
	}