Posted by Justin Koivisto on 11/16/02 11:31

Peter Jay Salzman wrote:
> Is it possible to create an image file from a string using only functions
> from core PHP (in other words, without 3rd party libraries/applications)?
>
> I'm interested in any image file that is displayable without plugins or
> helper applications, like jpg, png, gif.
>
> Thanks!

http://us2.php.net/manual/en/ref.image.php
"Note: Since PHP 4.3 there is a bundled version of the GD lib. This
bundled version has some additional features like alpha blending, and
should be used in preference to the external library since its codebase
is better maintained and more stable."

Therefore, if you are using php 4.3 or better, the functions are there.
You'd need to test for supported types and such since I believe it does
depend on what the server system supports. I usually use things like

if(function_exists('imagepng'))

to check if a certain type is supported on the server.
http://us2.php.net/manual/en/function.function-exists.php

HTH

--
Justin Koivisto, ZCE - justin@koivi.com
http://koivi.com

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