I have a date variable ($start_date) that I build with MKTIME.

I would like to compate this date to the current date ($today). To make matters worse, I need to adjust $today for the time zone (some users on the client side are on the other side of the International Dateline).

I'm seeking some advice on the best way to compare $start_date to $today.

First you will need someway to determine the time zone the user is in. The only way I can think of to do that is to have them somehow pass that information to you.

Typically the various date functions are calculated off the SERVERs time.

The ways to compare are depending upon WHAT you want to compare... The DAY, the HOUR, the Year, The MONTH DAY YEAR, etc.... Comparison is relatively easy using the UNIX timestamp since it's basic math (calculating the number of seconds within the comparison period). Without more information, I don't think I could be much more help, but I hope this helps get you in the right direction.



Paul Gardner
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Thanks Paul for your input. I think I am a bit fuzzy of the difference between gmdate and date, the latter being the "local" time/date. Does that mean the "local server" time/date as opposed to the GMT time/date? If so, then is date(Z, timestamp) the timezone offset of the server?

Is there no way of reading the TZ setting of the client (Windows Control Panel) with some client-side scripting and using it to compute the "local client" time/date?

gmdate gives the LOCAL TIME (of your server) in GMT Time. So if your local server is set for Eastern Time then at 5PM (local time) gmdate will give you a time of 12PM (Eastern Time - 5 hours) Again, as far as I know, with JUST PHP, you cannot get the timezone information (directly).

That being said, there are ways to determine it, but again, it has to be done CLIENT SIDE. I have found a few sites that might be useful in determining this.

http://www.siteexperts.com/tips/func...ng.asp?main=on
http://martin.f2o.org/php/localtime

I think that second link would probably be more helpful.



Paul Gardner
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