From: bytewise at gmx dot net
Operating system:
PHP version: Irrelevant
PHP Bug Type: Documentation problem
Bug description: imagepng: second parameter must not be '' or NULL
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
--
Edit bug report at http://bugs.php.net/?id=38794&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=38794&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=38794&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=38794&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=38794&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=38794&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=38794&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=38794&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=38794&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=38794&r=support
Expected behavior: http://bugs.php.net/fix.php?id=38794&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=38794&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=38794&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=38794&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=38794&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=38794&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=38794&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=38794&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=38794&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=38794&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=38794&r=mysqlcfg
