image editing

[chopWood]

i need to be able to resize a user submitted .jpg image. I've seen image classes for php (below) but I believe they're limited to .gif files.
Example:
A user submits a 1200 x 900 .jpg, php resizes it to 50% and saves it to the server (the file size/resolution is 50% as well).
Any ideas where to go from here?
thanks
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# resize(int width, int height)

# resizes the image to proportions specified.

# crop(int x, int y, int width, int height)

# crops the image starting at (x, y) into a rectangle

# width wide and height high.

[Xnuiem]

Use ImageMagick.

Google for it, then look on how to use convert or mogrify.