Edit report at https://bugs.php.net/bug.php?id=64637&edit=1
ID: 64637 Comment by: phpmpan at mpan dot pl Reported by: rstoll at tutteli dot ch Summary: redefine NULL Status: Feedback Type: Bug Package: *Languages/Translation Operating System: windows PHP Version: 5.4.7 Block user comment: N Private report: N New Comment: For some reason my earlier comment was not published here. It contained a table of test results from 7 different PHP versions and 3 testing modes. I'll have no time to rebuild the table now, but the point is that I confirmed the bug on Linux for various PHP versions (including trunk snapshot). However, the bug appeared only in __interactive__ CLI mode, not in `php -f` or PHP run from Apache. It seems that any NULL spelling is affected, except all-lowercase version. Also redefinition of particular spelling doesn't affect other spellings, so one can define NuLl as 'x', nULL as 'y' and each of them will keep their defined value. I would also point out that a link provided by Laruence in the first comment outputs "hello world" for some versions. Previous Comments: ------------------------------------------------------------------------ [2013-04-15 09:07:11] rstoll at tutteli dot ch I still got the "hello world" even without any extension. The output is slightly different, I got NULL instead of null without xdebug. But still NULL NULL NULL string(11) "hello world" Notice: Constant null already defined for PHP 5.3.5 and PHP 5.4.7 In my opinion this bug can be closed because probably no one will ever do this. As side mark, also http://3v4l.org/8knru does not show a notice for the first define. Thus the implementation is not entirely correct. I assume your PHP version behaves differently than mine in terms of symbol resolution. In my PHP version the case matters. So if I write NULL a different symbol is resolved than when I write null. In your version always null is resolved. That could be the reason why you do not get "hello world" as output. But I do not really know the internals of PHP, it's just an assumption. ------------------------------------------------------------------------ [2013-04-15 03:04:09] larue...@php.net please try again with a pure PHP (without any extension which will alter PHP behavior, like xdebug, xhprof, apc/opcache, or taint) thanks ------------------------------------------------------------------------ [2013-04-12 18:32:53] rstoll at tutteli dot ch strange that you do not have the same problem. However, a notice should already be shown for the first usage of define. ------------------------------------------------------------------------ [2013-04-12 16:57:14] anon at anon dot anon Tested on PHP 5.3.5 on Windows and I just get NULL as output all four times, and then the notice. Seems normal. ------------------------------------------------------------------------ [2013-04-12 11:21:28] rstoll at tutteli dot ch Maybe the bug only exists on windows. I got the error for 5.4.7 and 5.3.5 ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=64637 -- Edit this bug report at https://bugs.php.net/bug.php?id=64637&edit=1
