How can a GIF image < 1KB use up 100+mb of memory with imagecreatefromgif()?

[comp.lang.php]

re:

http://www.google.com/search?hl=en&q=swedish+flag&btnG=Google+Search

I am trying only this:

[PHP]
$image = @imagecreatefro mgif('/path/to/this/image.gif');
[/PHP]

This line alone causes a segfault on my machine; when I measured how
much memory it took to process this, it literally required up to 100+mb
of memory to process a GIF image that is only 953 bytes!!!

Is this normal behavior for imagecreatefrom gif()? I am using PHP 4.3.9
with GD 2.0.1, this shouldn't happen but it does

Phil

[NC]

Re: How can a GIF image &lt; 1KB use up 100+mb of memory with imagecreatefrom gif()?

comp.lang.php wrote:

re:

http://www.google.com/search?hl=en&q=swedish+flag&btnG=Google+Search

>
I am trying only this:
>
[PHP]
$image = @imagecreatefro mgif('/path/to/this/image.gif');
[/PHP]
>
This line alone causes a segfault on my machine; when I measured how
much memory it took to process this, it literally required up to 100+mb
of memory to process a GIF image that is only 953 bytes!!!
>
Is this normal behavior for imagecreatefrom gif()?

No. It's possible your copy of GD is damaged. Try reinstalling GD.

Cheers,
NC

[Andy Hassall]

Re: How can a GIF image &lt; 1KB use up 100+mb of memory with imagecreatefrom gif()?

On 5 Oct 2006 15:00:35 -0700, "comp.lang. php" <phillip.s.powe ll@gmail.com>
wrote:

>re:
>http://www.google.com/search?hl=en&q...=Google+Search

Re what page from this search?

>I am trying only this:
>
>[PHP]
>$image = @imagecreatefro mgif('/path/to/this/image.gif');
>[/PHP]
>
>This line alone causes a segfault on my machine; when I measured how
>much memory it took to process this, it literally required up to 100+mb
>of memory to process a GIF image that is only 953 bytes!!!

If it segfaults, get a backtrace and report it as a bug.

http://bugs.php.net/bugs-generating-backtrace.php

>Is this normal behavior for imagecreatefrom gif()? I am using PHP 4.3.9
>with GD 2.0.1, this shouldn't happen but it does

Given this isn't the first GD memory-related post you've made then there's
either something badly wrong with your installation or you're doing something
other than what you're describing.

--
Andy Hassall :: andy@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[comp.lang.php]

Re: How can a GIF image &lt; 1KB use up 100+mb of memory with imagecreatefrom gif()?


NC wrote:

comp.lang.php wrote:

re:

http://www.google.com/search?hl=en&q=swedish+flag&btnG=Google+Search

I am trying only this:

[PHP]
$image = @imagecreatefro mgif('/path/to/this/image.gif');
[/PHP]

This line alone causes a segfault on my machine; when I measured how
much memory it took to process this, it literally required up to 100+mb
of memory to process a GIF image that is only 953 bytes!!!

Is this normal behavior for imagecreatefrom gif()?

>
No. It's possible your copy of GD is damaged. Try reinstalling GD.
>

I am not capable of doing that on this particular machine as I don't
have root privileges onto it and the only ones who do are no longer
authorized to do any administrative work on this particular machine, so
I'm not sure what I could do as a workaround for this, but I am truly
suspecting that there is something within either PHP or GD, as others
pointed out, causing this to frequently occur and requires an upgrade
of both.

Thanx
Phil

Cheers,
NC