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From:Anonymous@osu1.php.net Date:Mon Oct  6 03:38:11 2008
Subject:note 86156 added to language.oop5.patterns
The "red-neck singleton" presented by wbcarts is not a singleton, but a presentation of static class members.

Static members are shared by every instance of that class, and as such should work precisely as he describes using them.

Singleton pattern is used to ensure that there only ever exists one instance of the singleton class.
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Manual Page -- http://www.php.net/manual/en/language.oop5.patterns.php
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