I'd like to implement a voting system on my site, without having to force them to create an account. They would ultimately be voting up/down a piece of content which has a unique ID.

  • I know that I could store entries in a table with IP/ID, but what if there are more than one user coming from the same IP?
  • Is there a way to uniquely identify visitors without it being tied to their external ip?
  • If created a GUID, store it in a cookie on that machine, could it be retrieved later on that same computer with the same IP? A different IP?

Any thoughts on these questions, or any insight to a better approach would be greatly appreciated.

php database-design cookies project-planning voting-system
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