convert perl script to php, plus additions

I would like a perl script converted to php, plus some bugs fixed the script takes a .csv file of keywords and groups them according to a number of rules - trying to put each keyword in the biggest group possible at present the front end is in php but the grouping algorithm etc is in perl - I want to convert everything to php so it can be maintained more easily. there is a function in the perl script to unserialize - so that it can talk to the php - this can obviously be removed. the php script should run at a similar speed to the php one. IMPORTANT - you must be good at understanding scripts and be able to work unaided, you will need to learn what the script does based on some examples that I provide. Clean, well commented code (in english) required. Any suggestions for improvement will be welcomed. the bugs are: - does not work properly with words that end in 's' - as there is an auto-join of plural groups - grouping issue with certain topics (examples will be provided) attachments: specification - description of the existing tool ipod example - a spreadsheet showing a manual example of how the grouping works. perl - the perl script ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Linux PHP5 Firefox Mac