Description:
------------
In #44144, it was said "spl_autoload_functions() should return object 
instances, not class names, when appropriate."

"should" and "when appropriate" seems a bit hazardous, to speak about 
a 
feature that has been working some way until 5.2.10

After a discussion with Pierre, he summed it up well as :

<Pierre> that's a very bad idea and break BC for a behavior that has 
existed for a good dozen releases


I understand that maybe we want it to behave somehow else in future 
versions, but I'm not sure minor releases of php 5.2 are the best 
place for it.

I will understand very well if this ticket is closed as invalid or 
wontfix (as the damage is already done, it's for sure a good idea not 
to change again in .12), but I wanted to report it to show how a so 
little BC change can affect some projects.


Reproduce code:
---------------
<?php
class Foo {
  public function nonstaticMethod() {}
}
$foo = new Foo;
spl_autoload_register(array($foo, 'nonstaticMethod'));
$funcs = spl_autoload_functions();
print_r((int) is_object($func[0][0]));


Expected result:
----------------
0

Actual result:
--------------
1