Bug #71236 [Opn]: Second call of spl_autoload_register() does nothing if it has no arguments

Edit report at https://bugs.php.net/bug.php?id=71236&edit=1

 ID:                 71236
 User updated by:    php at maisqi dot com
 Reported by:        php at maisqi dot com
 Summary:            Second call of spl_autoload_register() does nothing
                     if it has no arguments
 Status:             Open
 Type:               Bug
 Package:            SPL related
 Operating System:   Windows and Linux
 PHP Version:        Irrelevant
 Block user comment: N
 Private report:     N

 New Comment:

In "Actual results" should be:

   The first block prints one entry; the others print two blocks.


Previous Comments:
------------------------------------------------------------------------
[2015-12-29 12:39:21] php at maisqi dot com

Description:
------------
spl_autoload_register() with no arguments registers spl_autoload(). But if we call spl_autoload_register() with a custom function before, it does nothing.
Nothing in the documentation seems to support this behaviour as valid.

Tested on PHP 5.5 Linux, 5.6 Win64 and 7.01 Win64.

Test script:
---------------
<?php
echo '<pre>';
/**
 * Every one of these code blocks must be run in separated.
 */
// Custom function first; spl_autoload after.
spl_autoload_register(function ($class) {});
spl_autoload_register();
print_r(spl_autoload_functions());	// Prints only one entry.
/*

// Custom function first; spl_autoload after.
spl_autoload_register(function ($class) {});
spl_autoload_register('spl_autoload');
print_r(spl_autoload_functions());	// Prints two entries, as expected.

// spl_autoload first; custom function after.
spl_autoload_register();
spl_autoload_register(function ($class) {});
print_r(spl_autoload_functions());	// Prints two entries, as expected.
*/

Expected result:
----------------
All blocks should print two entries.

Actual result:
--------------
All blocks should print two entries, except the first that only prints one.


------------------------------------------------------------------------



--
Edit this bug report at https://bugs.php.net/bug.php?id=71236&edit=1