website refer to main site

I want to ask if anyone can assist me in a simple little php script, like a redirect kinda thing, here is my dilema : How do I setup a page where a script forces a user to go to the main part of the website, rather than a subfolder e.g. if they go to [login to view URL] have a script look the visitor, and see if they came from [login to view URL] to get to the abc folder, and if they didnmt, but simply typed in [login to view URL], then have the script redirect them back to the main page, so they have to click on the link to get to the abc place. I know this is possible, and ive tried some things, but didnt work, so any solution would be great, thank you. I have tried the cpanel redirect option, and the meta tag refresh to main site option, but thats not what im seeking, maybe the redirect bit, but first i need a script to see if the user came from the main website, via clicking on a link, or whether or not they went to the direct link, so thus throw them back to mainpage. ## 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 php