Learning PHP Design Patterns - PDF Books

As PHP expands to become the server-side program of choice among a significant portion of programmers, professional techniques and programming structures need to be incorporated.

Design patterns, a concept borrowed from The Timeless Way of Building by Christopher Alexander (Oxford University Press), refers to a general reusable solution to a commonly occurring problem within a given context. In everyday development work, PHP programmers encounter “commonly occurring problems” in a software development context, and the use of PHP design patterns is a set of solutions to “commonly occurring” PHP programming problems.

Pure and simple, PHP design patterns are tools used to deal with the reality of professional software development.
They are not libraries or templates but rather more general structures that can be used to solve problems. I like to think of design patterns in the same way as I do the loop structure.

The loop is used when some kind of iteration is required. True, there are other ways to deal with iteration, but a loop is a flexible tool that saves time in the development process. (Besides, it’s a lot neater than writing the same line of code 10,000 times!)

Further, I do not feel constrained by design patterns as “canned solutions” any more than a loop is a “canned solution” to iteration. Besides, I can use the loop structure in a variety of ways in PHP ranging from for to while statements and everything in between. Likewise, design patterns can be implemented in more than one way depending on the exact nature of the problem being solved.

The most important reason for incorporating design patterns, though, is that they provide solutions to complex problems. As one’s programs become larger, they almost necessarily become more complex.

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