Write Documentation for php program

Hi every body, I have full php project with databases containe: 1 schema=4 tables 1 schema=12 tables 14 php pages with 2 connections php file It' too simple simple call center program work with 2 databases. each database have connection php file. I'd like to write documentation for my project arround 6500 words include UML . And explain how the program work and code use. For an Example you have to create 2 databses containe 1 table and 2 connection and 1 php file, just to write how our project work. I need it in 5 days . Thanks