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<[Design Patterns, OOP, PHP] Design Patterns you use without knowing them ⁄ >




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Rise your hands if time ago (or even now) you stood litteraly in trance listening to your friends or colleagues talking about design patterns. . .I thought "Oh my God? Design what??", and I learned I was not the best incredibly skilled new born super ultra young mega nerd programmer in the world!
Anyway I felt better (and also my ego did) when I found those Design Patterns were no more than ways to solve common programming problems, and as I was programming since 2 or 3 years, I had already discovered some of them myself.

One of those was the strategy pattern. Imagine you have a class that connects to a storage layer (it could be a database or even another kind of diabolic machinery). At first you decide to use MySQL, as it is free and easy to use (escpecially with PHP). Unfortunately your first customer decides to use e.g. Ms-SQL Server: what a mess! Different libraries and methods...but as you have a bit of experience, gained by re-writing time after time your own libraries as each time you forget a method or parameter or a class, you know the great use of interfaces and you luckily used them with your SuperCoolMySQLClass. Now what you have to do is writing a MegaMSSQLServerClass, that will implement the SuperDataBaseInterface, and what you'll have to modify is just the row in which you create the instance of the class.



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http://dotnetbutchering.blogspot.com/2008/02/design-patterns-oop-php-d...




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