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Developer.com:
Threads Versus The Singleton Pattern
June 01, 2007 @ 10:43:00

In a new tutorial on the Developer.com website today, they explore the difference between (and the benefits and disadvantages of) the singleton pattern versus threading in a PHP application.

Although you probably could address some [of these] issues with the judicious use of synchronized blocks, do not overlook the utility of the ThreadLocal class. In this article, I will demonstrate the risk of not accounting for Threads when using a singleton pattern and show how simple it is to address.

They start with the creation of a ThreadLocal class, one that allows the developer to communicate with the threads, and its usage. In contrast, they also create the Singleton class, showing the creation method of multiple objects of the same type.

They do, however, point out an issue that the threaded method has - unreliable results. Help is on the horizon, though, in the form of a HelperFactory class to manage the connections a bit more efficiently.

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