in php 5 you can use the operator to ensure that an..., PHP Object Oriented Programming, PHP

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Question:In PHP 5 you can use the ______ operator to ensure that an object is of a particular type. You can also use _______ in the function declaration.

A instanceof, is_a 
B instanceof, type-hinting 
C type, instanceof 
D ===, type-hinting 
E ===, is_a

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