[Solved] Which of the following statements about instanceof is TRUE? — Ans: instanceof returns true if the object implements an interface | PHP

PHP - Inheritance and Polymorphism

Which of the following statements about instanceof is TRUE?

A<code>instanceof</code> can be used to check if a variable is null

B<code>instanceof</code> returns true if the object implements an interface

C<code>instanceof</code> only works with built-in PHP classes

D<code>instanceof</code> can check if a class exists

Step-by-Step Solution

Solution:

Step 1: Review instanceof behavior with interfaces
instanceof returns true if the object implements the interface.
Step 2: Check other options
It does not check null, class existence, or only built-in classes.
Final Answer:
instanceof returns true if the object implements an interface -> Option B
Quick Check:
instanceof works with interfaces = D [OK]

Quick Trick: instanceof works with classes and interfaces [OK]

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