Modification of the site in PHP

You need to improve the site in PHP. In general, everything works, basically it is grinding everything that is already there. We need a developer who can delve into what is already there. Everything was commented on as much as possible in the code.. Do not respond, if you do something for the first time, plan to study on this project, g**but you do not need to write code, then professionals will understand what we are talking about. Intermediaries — while the Studios — for now.

A description of what needs to be done is attached to the file. Write your approximate price at least and indicative terms to do all this.

All development on a separate server, the domain there will be different, this will need to be taken into account, since all sorts of tokens may not work. If everything is good, after that there will be more new, that is, the development of radically new functions. To do even what is now, it is important to discuss actively, can take your some adjustments, suggestions, etc.