WordPress at a glance
function is not described

spl_autoload_functions() WP 4.6.0

Retrieves the registered autoloader functions.

No Hooks.

Return

Array. List of autoloader functions.

Usage

spl_autoload_functions();

Code of spl autoload functions: wp-includes/spl-autoload-compat.php VER 5.0.3

<?php
function spl_autoload_functions() {
	return $GLOBALS['_wp_spl_autoloaders'];
}