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Workaround for bug #15797 (inconsistent error behaviour with GD)

php.internals

Antoine

23 years ago
Hi, Some users of our program SPIP are stumbling onto the following bug : http://bugs.php.net/bug.php?id=15797 See my comment at the end. It seems several PHP versions are plagued by this problem. I'd like to find a way to circumvent it, because we need our program to work with all PHP & GD versions. Unfortunately the fact that a fatal error is yielded when calling imagecreatetruecolor with the wrong GD version makes it seemingly impossible. Does anybody have an answer to this ? (note : another bug seems identical : http://bugs.php.net/bug.php?id=16002) Thanks Antoine.

Mats Lindh

23 years ago
- %antoine@rezo.net% (Antoine):
> See my comment at the end. It seems several PHP versions are plagued > by this problem. I'd like to find a way to circumvent it, because > we need our program to work with all PHP & GD versions. Unfortunately > the fact that a fatal error is yielded when calling imagecreatetruecolor > with the wrong GD version makes it seemingly impossible. > > Does anybody have an answer to this ? > > (note : another bug seems identical : http://bugs.php.net/bug.php?id=16002)
As the post says, this was fixed in CVS at the time. The change should be available in PHP 4.3.x, where the functions availbility could be checked with functions_exists(). There is also a function named gd_info() which provides version information in PHP 4.3.x. Prior to this I think you'll have to create something which parses the output from phpinfo() for more information. For further assistance on that, contact php-general@lists.php.net.
-- mats

Antoine

23 years ago
Hi,
> As the post says, this was fixed in CVS at the time. The change should > be available in PHP 4.3.x, where the functions availbility could be > checked with functions_exists().
Well, PHP 4.3 solves the problem by embedding its own GD version anyway ;-)
> There is also a function named > gd_info() which provides version information in PHP 4.3.x. Prior to > this I think you'll have to create something which parses the output > from phpinfo() for more information. For further assistance on that, > contact php-general@lists.php.net.
Well, if I'm in the mood for ugly hacks, I may use output buffering to get back phpinfo() results... Otherwise what I'm gonna do is probably to disable high-quality thumbnails (a.k.a. ImageCreateTrueColor and ImageCopyResampled) on versions below 4.3.0. If people ask why this is the case, I'll explain that their PHP version is badly coded and forbids us to do a runtime check for these functions... Thank you for your answer, Regards Antoine.