On NetTuts.com today there's a new tutorial they've posted showing how to use PHP's DateTime functionality in a more OOP kind of way. The DateTime extension lets you work both ways - procedural and OOP, with only slightly different syntax changes between them.

The Date/Time PHP extension is a set of classes that allow you to work with almost all of the date and time related tasks. It’s been available since the release of PHP 5.2 and the extension introduced several new classes.

The tutorial first shows you some of the differences between just working with something like date and DateTime. From there they get into a bit more complicated things like:

• Modifying dates/times
• Working with multiple dates
• Working with timezones
• Using DatePeriods
• Extending the current functionality

There's also two more "real world" usage scenarios included - defaulting to using UTC times and using the DateInterval to handle subscription payment logic.