Combine two pictures on behalf of 4 points

I need a PHP Class which can do the following: **Combine 2 Pictures and output the Picture itself or save it as JPG.** * There will be 2 Pictures. For example [login to view URL] and [login to view URL] * I have also 4 exact positions (Pixel) where I want you to insert [login to view URL] in [login to view URL] * The door needs to be manipulated (distorted) so it fits inside these coordinates. * You can use GD or ImageMagick * I want also to be able to set the output size. If I enter only Width or Height, the other size will be automatically set. (Proportional scaling) Please see the ZIP file for more information (read the PDF and see the example Photos)