Design patterns or designing of software development are unavoidable for a project. The design process comes into the preliminary stages, just after starting a project. It is simply the planning process before doing some thing. In earlier days, most of the developers had an intention to jump into the development after the confirmation of a project by client.

Why design patterns are necessary?

What will be the result if we jump into a (unknown) pond without thinking? There may be corcodiles..

The same matters here. We need to be sure that we are going in the right way. A little thinking before jumping into something (may be pond) will help you to do the best, which is actually a life saver.

Proper software designs helps you to avoid unwanted confusions while development. It also helps to determine the issues, test cases, etc.. which makes our life easier.

Some design patterns in PHP:

• The factory pattern
• The singleton pattern
• The observer pattern
• The chain-of-command pattern
• The strategy pattern
• The adapter pattern
• The iterator pattern
• The decorator pattern
• The delegate pattern
• The state pattern