Edit report at https://bugs.php.net/bug.php?id=55475&edit=1
ID: 55475
Updated by: ka...@php.net
Reported by: mads at gartneriet dot dk
Summary: is_a() triggers autoloader
Status: Assigned
Type: Bug
Package: Scripting Engine problem
PHP Version: 5.3.7
Assigned To: dmitry
Block user comment: N
Private report: N
New Comment:
I'm not arguing that the new behaviour is wrong, I believe it is the desired
too but I don't agree to break BC in the middle of a stable release series nor
as much as I would like to myself to achieve the right behaviour.
Previous Comments:
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[2011-08-22 13:31:21] col...@php.net
It seems correct to me as well to trigger autoload in this case. It does and
always did so for is_subclass_of(), I don't see any reason for a condition of
"subclasses_only" to yes or no trigger the autoload.
------------------------------------------------------------------------
[2011-08-22 11:00:28] dmi...@php.net
Before the patch, is_a() didn't accept string as the first argument at all, so
it always returned "false" and never triggered __autoload(). The proposed patch
didn't revert to original behavior. It just disables autoloading and may lead
to wrong result.
class a {}
class b extends a {}
var_dump(is_a("b", "a")); // it was false before 5.3.7, now it's true
I would say that the old behaviour was wrong, especially because "instanceof"
and is_subclass_of() already implemented support for string arguments.
------------------------------------------------------------------------
[2011-08-22 10:30:19] ka...@php.net
The following patch has been added/updated:
Patch Name: bug55475
Revision: 1314009019
URL:
https://bugs.php.net/patch-display.php?bug=55475&patch=bug55475&revision=1314009019
------------------------------------------------------------------------
[2011-08-22 10:29:51] ka...@php.net
Zeev, although the functionality might appear as it should be then we should
not make sudden changes like that in the middle of a stable branch, we should
patch up 5.3 and keep the behaviour in 5.4 if its indeed intended atleast to
comply with previous versions.
The fix for 5.3 is simple, attached
------------------------------------------------------------------------
[2011-08-22 10:12:48] z...@php.net
Discussed with Dmitry, the current functionality appears to be correct.
is_a('foo', 'bar') *can* be true even if class foo isn't loaded, and we'll only
know that if we try to load 'foo'.
This is different from is_a($obj, 'non_existent_class'), which we can resolve
as
'false' in case non_existent_class isn't loaded without trying to load it
(there
can't be an instance of a class that doesn't exist).
------------------------------------------------------------------------
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