GD2 Producing Empty Images

I've found a problem with many of my PHP installations. I'm not sure
whether it's a PHP problem, or an Apache problem, or something else
again.

The issue appears when we try to use the following snippet from the PHP
docs for imagecreate():

<?php
header("Content-type: image/png");
$im = @imagecreate(100, 50)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, 255, 255, 255);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, "A Simple Text String", $text_color);
imagepng($im);
imagedestroy($im);
?>

This brings up an empty page. FF Page Info shows a 0px x 0px png. I'm
using Win2K on 2 of my 3 machines. On the 3rd, XP machine I'm using
xampp which uses Apache 2, and it works on that one.

Currently trying to install xampp on my main workstation (win2k), but
can't get existing port 80 server cleared... That's another issue.

Anyone have similar problems with GD2 in PHP?

Thanks,
- AAA

alfred.ayache@gmail.com wrote:
> I've found a problem with many of my PHP installations. I'm not sure
> whether it's a PHP problem, or an Apache problem, or something else
> again.
>
> The issue appears when we try to use the following snippet from the
> PHP docs for imagecreate():
>
> <?php
> header("Content-type: image/png");
> $im = @imagecreate(100, 50)
> or die("Cannot Initialize new GD image stream");
> $background_color = imagecolorallocate($im, 255, 255, 255);
> $text_color = imagecolorallocate($im, 233, 14, 91);
> imagestring($im, 1, 5, 5, "A Simple Text String", $text_color);
> imagepng($im);
> imagedestroy($im);
>>
>
> This brings up an empty page. FF Page Info shows a 0px x 0px png.
> I'm using Win2K on 2 of my 3 machines. On the 3rd, XP machine I'm
> using xampp which uses Apache 2, and it works on that one.


What if you move the header bit, and try to view the php file directly?
Sending a header before any errors may be outputted can screw up your
possibility to see the errors.

<?php
$im = @imagecreate(100, 50)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, 255, 255, 255);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, "A Simple Text String", $text_color) or
die('Cannot create text');
header("Content-type: image/png");
imagepng($im);
imagedestroy($im);
?>

It works here BTW, without problems.
Could you maybe give us the GD bit's of phpinfo() from the different
servers?

(here:
GD Support enabled
GD Version bundled (2.0.28 compatible)
FreeType Support enabled
FreeType Linkage with freetype
FreeType Version 2.1.9
T1Lib Support enabled
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
XBM Support enabled)

Grtz,
--
Rik Wasmus

alfred.ayache@gmail.com wrote:
>
> I've found a problem with many of my PHP installations. I'm not sure
> whether it's a PHP problem, or an Apache problem, or something else
> again.
>
> The issue appears when we try to use the following snippet from the PHP
> docs for imagecreate():

Since you are using a code snippet from the docs I simply assume it is
correct without checking it. Which brings me to one of the standard
errors when using the GD2 library:

Have you made sure you enabled it? It is disabled in a standard PHP
install. Look into the php.ini file, look for the line

extension=php_gd2.dll

and if the line looks like this

;extension=php_gd2.dll

remove the ; in front of it, then restart Apache.