Bin packing algorithm in PHP

Hi, My project is the following. First of all, i have to say that it is a difficult algorithm to find. It's also called the "bin packing" problem. You can google for it. The problem is the following : You have 5 packing boxes (parallelepiped shapes) of different sizes (5 is an example, it could be more or less). You need to pack X products of given sizes (parallelepiped shapes too) in one of the boxes. The algorithm must tell you which box you have to use, and eventually, in which way you have to arrange the products in the packing box. The program should be in PHP, with a very clean source code, commented. If the algorithm only returns the right box, it's nice, but if it make a drawing (for example with the GD library), it would give you some extra $$$. Please add the word "france" to your bid to proove you understand everything. I always give a chance to new workers, but you have to be very serious, and quickly answer emails. I do not like very big companies who bid on everything without having interest in the project. Of course, you'll be paid after multiple tests. Many thanks.