PHP / JS image creation

I'm wondering if this is possible: user uploads a picture which is then presented to him in the browser. The image is placed inside a div that has predefined image as backgroun开发者_如何学编程d. User can drag and drop his uploaded image inside the boundaries of this div.

It would be something along the lines of uploading a pic of yourself and then positioning it against a background of a tropical beach. User then clicks ok and has the option to download the image.

I have the upload and JS drag & drop covered. I'm just wondering: is it the possible to create a new image on the server that exists of the back - and foreground image? So basically an image would have to be created from the contents of the specified DIV.

Yes it is possible using the functions of GD, you may also want to check out imageMagick