PHP statistics program

Hi
I have an old PHP statistics programme for football clubs. I would like to bring this up to date and to possibly enhance it and make it a centralised program/system for many clubs to use.

The PHP program as it stands is probably around 10 years old so may have old constructs etc that are not efficient in this day and age, with the newer versions of PHP that have been released. The program was originally designed to be used by just one club!!

The program also uses an SQL database of which I can set up on my website for development/testing purposes.

The program will therefore be used for numerous football teams to enter their own match results and team lineups.

Program will also need to tie in with a Wordpress front end for my own administrative/website updating purposes.