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:
... the behaviour I'm talking about is obvious the return value and the fact
that the autoloader now is called.
Previous Comments:
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[2011-08-22 14:40:46] ka...@php.net
I'm talking about the usual procedure we have about changing behaviour, a
function suddenly returns the oppersite of what it used to in the middle of a
stable series is very unlike to do, even for PHP.
I knnow it went from not working to working, but I don't on the fact that such
a commonly used function will change behaviour like that. What we should do is
to make a big fat warning in the migration guide for 5.3.x -> 5.4.x about it,
and in the manual.
It would be the same if we changed substr() to be case insensitive in the
middle of a release series, lets just not venture in such dark corners.
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[2011-08-22 14:27:31] col...@php.net
But what BC break are you talking about exactly?
It went from not-working (returning always false for strings as first argument)
to working with autoload.
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[2011-08-22 13:41:16] ka...@php.net
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.
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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.
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[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.
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