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Five common PHP design patterns 

Тэги: php, программирование, уроки,

Design patterns were introduced to the software community in Design Patterns, by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides (colloquially known as the "gang of four"). The core concept behind design patterns, presented in the introduction, was simple. Over their years of developing software, Gamma et al found certain patterns of solid design emerging, just as architects designing houses and buildings can develop templates for where a bathroom should be located or how a kitchen should be configured. Having those templates, or design patterns, means they can design better buildings more quickly. The same applies to software.

Design patterns not only present useful ways for developing robust software faster but also provide a way of encapsulating large ideas in friendly terms. For example, you can say you're writing a messaging system to provide for loose coupling, or you can say you're writing an observer, which is the name of that pattern.

It's difficult to demonstrate the value of patterns using small examples. They often look like overkill because they really come into play in large code bases. This article can't show huge applications, so you need to think about ways to apply the principles of the example -- and not necessarily this exact code -- in your larger applications. That's not to say that you shouldn't use patterns in small applications. Most good applications start small and become big, so there is no reason not to start with solid coding practices like these.

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