From: laszlo dot janszky at gmail dot com
Operating system: windows xp
PHP version: 5.2.6
PHP Bug Type: GD related
Bug description: Imagecolorallocate,imagettftext,rand combined bug
Description:
------------
I'm calling imagecolorallocate and imagettftext functions with random
parameters in a loop, but after some call the imagecolorallocate function
returns FALSE. I checked the random parameters, but nothing strange about
them.
I think the bug is associated with the rand function, because the more I
call the rand function, the earlier the bug comes in loop. If I delete the
rand from the 5 times I call, and replace it with constant number, the bug
comes later in cycle. With this settings it's about character 'w', but not
on a constant place, somtimes 'x' or 'y'.
Reproduce code:
---------------
$text=str_split('0123456789abcdefghijklmnopqrstvwxyz',1);
$image=imagecreate(600,50);
$bgcolor=imagecolorallocate($image,0,200,130);
foreach($text as $char)
{
$r=rand(0,30);
$b=255-rand(0,30);
$g=138+rand(-15,15);
$a=rand(0,10);
$l=15+$len*15;
$t=35+rand(-5,5);
$s=20+rand(-2,2);
imagettftext($image,$s,$a,$l,$t,imagecolorallocate($image,$r,$b,$g),'xfont.ttf',$char);
$len++;
}
header("Expires: Mon,26 Jul 1997 05:00:00 GMT");
header("Last-Modified: ".gmdate("D,d M Y H:i:S")." GMT");
header("Cache-Control: no-store,no-cache,must-revalidate");
header("Cache-Control: post-check=0,pre-check=0",false);
header("Pragma: no-cache");
header("Content-type: image/png");
imagepng($image);
imagedestroy($image);
Expected result:
----------------
I expect to get an image with characters
'0123456789abcdefghijklmnopqrstvwxyz' one after the other with
different(random) angles and colour.
Actual result:
--------------
I got an image with characters '0123456789abcdefghijklmnopqrstvw', so not
the complete character list. And didn't get any error messages or notices
with error_reporting(2047).
--
Edit bug report at http://bugs.php.net/?id=46466&edit=1
--
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46466&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46466&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46466&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=46466&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=46466&r=needdocs
Fixed in release: http://bugs.php.net/fix.php?id=46466&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=46466&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=46466&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=46466&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=46466&r=support
Expected behavior: http://bugs.php.net/fix.php?id=46466&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=46466&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=46466&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=46466&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46466&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46466&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=46466&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=46466&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=46466&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=46466&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=46466&r=mysqlcfg