I am a pretty lazy guy and therefore I want to do all things with as little trouble as possible. Usually , I don’t plan a certain methodology for my projects, instead , I use an organic approach. If things are needed, they will be added to my ‘methodology’.
One of the most important issues [...]

In my previous post I  gave some examples on  how caching can evolve.   However , what annoys  me in the  second and third approach is that I have some extra code and  dependencies  which are not really related to my class.  The examples bellow detail how you can use a decorator to cache another class.

class [...]

No talking . Just examples
class Foo
{
private static $_bar = null;

private function getBar()
{
if ( null == self::$_bar) {
//very expensive operation
[...]