New to PHP 5.4: Traits – Simas Toleikis.

Really geeking out at the fact that PHP 5.4 includes traits. If you’re not familiar with traits, they’re a method of inheritance somewhat like extending classes. Simas does a great job of explaining the intimate details of traits in PHP 5.4, so I’ll leave it at my excitement about using something like this soon(ish):

trait Singleton {
    public static function getInstance() { ... }
}

class A {
    use Singleton;
    // ...
}

class B extends ArrayObject {
    use Singleton;
    // ...
}

// Singleton method is now available for both classes
A::getInstance();
B::getInstance();

Sweet.