PHP image generator/handler

I'd like to create a PHP image generator that takes several query string parameters and generates an image on the fly. I've done this before in ASP.NET via a handler but now I'd like to in PHP. For example, I'd like a call to image.php?img1=foo.jpg&img2=bar.jpg to render the concatenation of foo.jpg horizontally next to bar.jpg. Later on I'll do some mod_rewrite to make it something like foo_bar.jpg but that's not my concern. Are there any samples out there that do what I want or any code snippets to examine? This is actually more of a learning experience than a necessary step to build something.

Here's a sample application of it:

image.php?d=14&m=jan&y=2010

Would really be the graphic concatenation of 14.jpg + jan.jpg + 2010.jpg

And after mod_rewite it could be used like:

14_jan开发者_Python百科_2010.jpg

The PHP GD library can certainly do this. You can work out how large the image needs to be, create a blank one and then use imagecopymerge() to copy the three images into it.

I can give you some sample code if it helps.

http://www.psych0tik.net/images/sig.phps ::EDIT LINK IS BROKEN. I'll fix it shortly.

It's very simple (and doesn't do exactly what you want) but should be able to fulfill your needs with some minor hackery.