Index: reference/spl/functions/spl-autoload-register.xml
===================================================================
--- reference/spl/functions/spl-autoload-register.xml	(revision 286314)
+++ reference/spl/functions/spl-autoload-register.xml	(working copy)
@@ -21,6 +21,12 @@
    spl_autoload_register() will effectively replace the engine cache for
    the __autoload function by either spl_autoload() or spl_autoload_call().
   </para>
+  <para>
+   If there must be multiple autoload functions, <function>spl_autoload_register()</function>
+   allows for this. It effectively creates a queue of autoload functions, and runs
+   through each of them in the order they are defined. By contrast, __autoload()
+   may only be defined once.
+  </para>
  </refsect1>
 
  <refsect1 role="parameters">