PHP :: Bug #28712 :: NULL can't be passed to argument with class type hint.

Bug #28712

NULL can't be passed to argument with class type hint.

Submitted:

2004-06-09 19:02 UTC

Modified:

2004-06-10 09:01 UTC

Votes:	3
Avg. Score:	2.3 ± 1.9
Reproduced:	3 of 3 (100.0%)
Same Version:	3 (100.0%)
Same OS:	1 (33.3%)

From:

davojan at mail dot ru

Assigned:

Status:

Not a bug

Package:

Scripting Engine problem

PHP Version:

PHP5-RC3

OS:

FreeBSD 4.7-RELEASE

Private report:

CVE-ID:

None

View Developer Edit

[2004-06-09 19:02 UTC] davojan at mail dot ru

Description:
------------
Actually it was tested in RC3 (I don't find it in PHP version list).
It's very inconveniently, if I can't pass NULL instead of object to the function.
In the example below the default value is used, but there is a same behaviour, when I pass NULL explicitly.
I understand, that the report:
http://bugs.php.net/bug.php?id=26780&edit=2
intersects with my, but my opinion is that not accepting NULLs is an evident bug, very serious bug! And my example with the default value illustrates it very well.

Reproduce code:
---------------
<?
	class foo {};
	function bar (foo $f = NULL) { echo 'ok'; }
	bar();
?>

Expected result:
----------------
ok

Actual result:
--------------
Fatal error: Argument 1 must not be null in /usr/local/www/data-dist/ils/admin/test/null.php on line 3

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[2004-06-09 19:19 UTC] davojan at mail dot ru

The compromise can be to add new configuration parameter, something like "allow_type_hinted_pass_null", to enable or disable this feature.

[2004-06-10 01:34 UTC] imprestavel at gameguru dot com dot br

or just drop the type-hint
unless you use your class as if it was NULL (do nothing with it), you are going to check that argument anyway
keep it simple
maybe it doesnt make much difference, but since php team already discussed it, probably with a similar example in mind, and went this way, i think we would need to give them a much better reason to change back

[2004-06-10 09:01 UTC] derick@php.net

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

For a reason, please read the internals@ archive of about 2 months ago.

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