Wednesday, 14 March 2007

Article: Learn Mediator Classes in PHP 5

Alejandro Gervasio in the first article of a two part series introduces you to the Mediator classes in PHP. He says, in this two-part series he will show you how a mediator class can be defined, and how it can be put to work by employing examples.

He explains, implementing a pattern known as ‘mediator’ can make a synchronization between a group of PHP classes. When the mediator pattern is applied, there's a single class that implements the logic required to keep all the other classes synchronized with each other. These modifications introduced by one class will be reflected in the others and also these changes will be performed via the interface of the mediator class.

He explains the practical side of the topic under the following sections:

• Creating a simple mediator class: in this section he shows how the mediator class works with code examples.
• Building a pair of data file handling classes: the next step consists of creating the two additional data file classes. These classes will be kept completely synchronized by the corresponding mediator.
• Building a practical example: this section consists of an instructive example where all the classes that were built previously are put to work in conjunction.