flash to php to jpeg/gif?

I have a flash swf. It lets people draw cool things (just a pen tool). Now I want to have them be able to export it somehow to a website so they can view what they开发者_开发百科've made online.

Whats the best way to do this?

I know as3 and php right now, but do I need anything else?

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First you need to make sure your drawing is a BitmapData (using draw if it's a shape), then you can encode it to JPEG or PNG, and then send it to PHP using something like this: Save ByteArray to file with PHP

There are a few GIF encoders also, but I wouldn't recommend them for drawings.