ID: 38794
Updated by: [EMAIL PROTECTED]
Reported By: bytewise at gmx dot net
-Status: Assigned
+Status: Closed
Bug Type: Documentation problem
PHP Version: Irrelevant
Assigned To: pajoye
New Comment:
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.
Thank you for the report, and for helping us make our documentation
better.
Previous Comments:
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[2006-09-17 04:53:43] fletch at pobox dot com
This is also present, at least in imagepng(), in 5.1.4.
imagepng( $img, NULL ) triggers this error:
Warning: imagepng() [function.imagepng]: Unable to open '' for writing
------------------------------------------------------------------------
[2006-09-12 19:14:43] bytewise at gmx dot net
Then I guess the documentation *really* needs an update, because it
looks totally different. There is no mention of the quality and filter
arguments.
Additionally, the empty string is *also* invalid, not only NULL.
------------------------------------------------------------------------
[2006-09-12 18:23:42] [EMAIL PROTECTED]
The function accepts the following arguments set:
imagepng($im, "filename"); save $im as filename
# save $im as filename, using compression and $filter
imagepng($im, "filename", $compression, $filter);
# Output $im, using compression and $filter
imagepng($im, NULL, $compression, $filter);
NULL is invalid if the compression and filter arguments are not used.
------------------------------------------------------------------------
[2006-09-12 16:09:42] bytewise at gmx dot net
Description:
------------
The documentation of imagepng (in English and German) states that the
second parameter may be null or the empty string:
"
bool imagepng ( resource image [, string filename] )
The filename argument is optional, and if left off or filled with a
NULL value, the raw image stream will be output directly.
"
This is not the case, at least in php 5.1.6 this function does not work
anymore if given an empty string or null as second parameter. It will
merely generate a warning ("Unable to open '' for writing"), and output
some trash, not a real png image.
This problem is NOT related to sending a bad header.
The same code worked fine for me in php 5.0.4; after an upgrade to
5.1.6 it stopped working. I removed the second (null) parameter to
imagepng, and it worked again. Only it took a couple of hours to find
out :)
There at least 2 bug reports that are related to this, both of which
have been closed (nothing having been done about them):
http://bugs.php.net/35061
http://bugs.php.net/36464
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Edit this bug report at http://bugs.php.net/?id=38794&edit=1
