Modify Php code to add more product sorting option

my website is done in Php and mysql, and you would need good knowledge of the same to do this project. currently the users in my products page can only sort products by low to high, and high to low price. however, i want to add more sort options for the users, where they can sort a product by the color, by shape, etc. to get the best idea of what i need, please visit the following page as this would give you an idea of what i require:- (<[login to view URL]>) as you can see in the middle of the above page, a user can sort the product further using various options. i want something simillar for my website also. i would give the exact details to the bidder that i select. What other Sort options I need:- I need the user to be able to sort the products further by color, shape, price and weight. You would have to search the title name of all the products for the related criteria and show them in the sort option like the above website. The work is very simple and can be implemented very easily by someone who has good knowledge in php and mysql. I would require you to make a php file which i can add to my existing php file using the include option. The work is very urgent, and any good and repectable bid, i would accept immidiately. thanks