Simple Object Access Protocol Under PHP
When implementing multi-tier software applications, you need to be able to make calls from programs running on Machine A to programs running on Machine B. For example, you might have a module on the business-logic layer that calculates the profit or loss of a certain business unit during a certain time period. In order to make that calculation, the logic module needs to make requests of one or more programs on the accessor layer. Assuming the accessor layer exists on another physical host, a mechanism needs to be devised to facilitate the passing of requests and responses between the two layers.
Various solutions for this problem exist, but none are as simple or as versatile as simple object ...
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