Is there an out-of-box PHP solution to do revision control for database fields?
This looks promising, but I don't know how well it works. Will you test it for me? :P
how about using a UNIQUE TIMESTAMP? This has to be refined, but you get my point.
Or do you want to keep track of the exact changes a user made to a huge text? I think it depends on what it exactly is you want to do, b/c versioning of real-language-texts might trigger conflicts that have to be resolved manually before the user can "commit" his change. Might be tough to establish ... but depends.
Best regards
Raffael