URGENT: A simple hi-score script in Perl or PHP

NOTE: this work is extremely urgent, I need it done within 24 hours! I have a small game. I want to add to it a simple on-line "Hi-score" mechanism. Part A: store the score This will be implemented with my program (a VB program) calling an URL in the browser like: www.something.com/hiscore.php&score=14512&nick=MyName&check=3456123 score is the score nick is the nickname the user will chose check is a checksum of the score to avoid tampering in the score (a numerical function of the score to be agreed upon) This script will: 1 check if the checksum is ok, if [login to view URL] to a page 2 check if the same IP has submitted the first score in the last hour, if so redirect to a page warning htat the score has been stored already 3 store the information (nickname, score and time) go to an acknowledgment page saying:"congratualtions, you have scored 123 out of 1234 players" in this page there will be also a link saying provide to the "top score list" see below Part B: store the score This script will display the score it has received, dividing them in pages of N entries each The data should be kept in a text file, sorted in descending order in a format like Score|username|timestamp No DBs are usable, sorry! ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform linux with php and perl