types - Implementation of datatypes in PHP -

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i wanted know data type implementation in php need few resources(books websites , ...). want not data types php support or how use them, it's implementation , how these things done php. want know how stored in memory , detail things it(i know php pretty good). great if lead me can find information.

here couple of articles on data types in php php rocks , dummies. interesting aside when comes data types in php type hinting force data type used function parameter.


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