comparing dates

[donutzeatpeople]

Does anyone know of any build-in function or way to compare dates in PHP? For example, on a guestbook script, I would want to only allow a person to sign the guestbook once per hour or so. And it seems like I would have to write a pretty complicated function to verify this. So, I was wondering if there are any built-in functions or something that would compare two dates and tell me how far apart they are, or something to that extent.

 

[KarveR]

if you are using mysql with the guestbook, then use a timestamp in a time field and you'll have most of the hard work cut out immediately. ______________________________________________________________________
There's no present like the time, they say. - Henry's Cat.

 

[kubla]

The strtotime function is probably what you're after.

http://www.php.net/manual/en/function.strtotime.php

If you're writing the time the author wrote to the board, then grab the local system time, convert it to a string and compare them.

http://www.robertgraves.org