[UPHPU] PHP Store

[Webot Graphics]

I have a project that someone wants me to do. I am wondering if it  
can/should be done in php (not knowing php at all i am unsure, but  
willing to learn because php sounds cool).

The concept (because of contracts I had to change the type of store  
that is being used) -
Like a drive-through mini mart (like 7-11), where can drive up to get  
there order. Now because of the quantity of selection (over 500  
products) this won't be able to be done with a regular McDonald's  
menu. The customer, because of this, and a techy feeling, wants to  
use kiosks, in the drive through (more like a Sonic drive through),  
and also inside the store. He also wants people to be able to place  
their orders online, so it will be ready for them.

The execution -
I figure that we are going to need a client-side website, a client- 
side kiosk website (unless they can be the same, i just think that  
the buttons on the kiosk are going to have to be bigger), and a store- 
side website that pulls up the orders. Now because this is a drive- 
through the orders have to be sent to the store-side server fairly  
quickly.

The question -
Should this be attempted completely in php or a combination of php  
(the front end) and a computer language like cocoa (the store end)?