I am thinking of new project, which I want it to be completed within 10 days, I am thinking would it be possible as after designers, developers also need some time.

Well, you can continue with the coding stage when the design and build stages are on, this is because PHP allows you to separate HTML code from scripted elements. Not only can this make life easier for you as a programmer, but it also can remove obstacles that stand in the way of effective and flexible design.