Re: Calendar/Date

On Wed, Mar 18, 2009 at 11:46:31AM -0400, Bob McConnell wrote: > From: Paul M Foster <snip> > > You also need to be aware that on 32 bit Unix and Linux systems the > behavior of mktime() on dates after Jan 18, 2038 is undefined. The 32 > bit counter overflows early on the 19th, so any value returned is > invalid. This is not a problem on 64 bit systems. > > We ran into this recently because Support was defining "never expire" as > Today plus 30 years. A couple of sites started reporting problems about > two months ago. This is why I normally never use the time functions in PHP. Instead, I wrote a date class that uses Julian days internally and doesn't consult PHP time functions. When I need some odd thing (like the date for the end of the week), I just add it as a member to the date class. Plus, PHP's date objects are woefully unfeatureful. If someone asks on the list for a solution, I can use the PHP time functions for advising them, but I don't personally use them. Paul -- Paul M. Foster