This will be PHP 4.x, so hashing is pretty much out of the question, as far as I know. Don't know how large sha or md5 will go. Mhash not available, as provider won't install it. But, even with a hash, I still have the same question as to the length allowed, this time related to the hash capability.
Funny, never bothered me for years, but now I've just gotta know <chortle />.
While I'm not expecting any novels, there's a fair chance that some of the text area content could approach - maybe surpass - 64K in size, with one or two being even larger.
I wonder if it might be more effective to save the MySQL text field as a file, then do a compare with the textarea? Not certain how CPU-/memory-intensive that might be, and it would definitely need to be server-side, a situation I'm trying to avoid. Not certain I know enough JS to do that locally.
Only other alternative I can see at the moment is just to do an automatic update to the text field ... but that's another query call on the server, and there are already more than I'd like. <Sigh /> PC-File was so much simpler <groan />.