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By piccoloprincipe
via giorgiosironi.blogspot.com
Published: Mar 09 2010 / 09:46

Practical Php Patterns: Observer
Today's pattern is the Observer one. The intent of this pattern is breaking a [usually one-to-many] dependency between objects by making the set of objects act as Observers of a Subject one, which notifies them when its state changes or is affected someway. The result of the application of the Observer pattern is an effective reduction of coupling: often notifications are sent to disparate objects which are thus prevented to becoming entangled.
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