Of cause, it possible to use another function to put one pixel, but rectangle required, to work inside user function, that makes diagrams etc.

What was the configure line you used? (PHP comes with bundled GD library with lot of fixes, if you didn't use that, try it)

Try with a 5.2 snapshot or with 5.2.5, the problem should be fixed in 5.2.5 and in cvs. This regression was introduced in 5.2.4.

If you use an external library, you have to use the CVS version of libgd. The last release does not contain the fix (2.0.35).

However, as suggested by Jani, you should use the bundled library. It contains many more features (fixes are synced now, except for the threaded environments). To do so use the "--with-gd" configure option without any argument.

I _always_ use bundled in gd library. My configure line is:

./configure --prefix=/usr/local/php5 --with-apache=../apache_1.3.29 --with-gd --with-jpeg-dir=/usr --with-png-dir=/usr --with-zlib-dir=/usr/lib/python2.3/lib-dynload/

* * *

Oh! I discover new variations of this bug.
Try to draw 1x1 pixel rectangle with another coordinats:
imageRectangle($img,1,1,1,1,$color);
imageRectangle($img,5,5,5,5,$color);
imageRectangle($img,10,10,10,10,$color);
etc.
The parallelepiped 3x1 pixels is burned.

Please try using the _latest_ php 5.2 release or using a snapshot.

I can't reproduce your problem. By the way, in your latest example, you use $color and not $fgcolor, it is certainly why you don't see the pixels, they are drawn using the background colors (index color 0).

:-)
I check this example on identical to firts message script. Simply, I type this example "by hands.

The right code:
<?php
$k=imageCreate(20,30);
$bgcolor=imageColorAllocate($k,255,0,255);
$fgcolor=imageColorAllocate($k,0,255,255);
imageFill($k,0,0,$bgcolor);

imageRectangle($k,1,1,1,1,$fgcolor);
#imageFilledRectangle($k,1,0,1,1,$fgcolor);
#imageFilledRectangle($k,2,0,2,2,$fgcolor);
#imageFilledRectangle($k,3,0,3,3,$fgcolor);
#imageFilledRectangle($k,4,0,4,4,$fgcolor);
#imageFilledRectangle($k,5,0,5,5,$fgcolor);


header("content-type:image/png");
imagePNG($k);

imageColorDeallocate($k,$fgcolor);
imageColorDeallocate($k,$bgcolor);
imageDestroy($k);
?>

Thanks, after 12:00pm, when traffic will be half-cheaper, I try new version of PHP.

Commented lines in code listing aren't signifys.

I believe you orally. New version is not needed by me (to download it only to see bug correction).

Already fixed.