This extension is
EXPERIMENTAL. The behaviour of this extension—including
the names of its functions and any other documentation surrounding this
extension—may change without notice in a future release of PHP.
This extension should be used at your own risk.
In Object Oriented Programming, it is common to see the composition of
simple classes (and/or instances) into a more complex one. This is a
flexible strategy for building complicated objects and object
hierarchies and can function as a dynamic alternative to multiple
inheritance. There are two ways to perform class (and/or object)
composition depending on the relationship between the composed
elements: Association and
Aggregation.
Load balance : Server 04
