Combine the functions of 2 PHP programs -- 2

I currently use php shell programs to take multiple csv/xls files and combine them into a single output csv file. I currently Have a need to combine the code of 2 php files which is first processing file and the second currently checks to make sure output matches up with original feeds information for data checking. If this is done in a timely matter there will be future projects involving these files and would give you first shot at those as well.