[Solved] Which statement about the instanceof operator is FALSE? — Ans: instanceof can check if a class exists in the current namespace | PHP

PHP - Inheritance and Polymorphism

Which statement about the instanceof operator is FALSE?

A<code>instanceof</code> returns false if the variable is null

B<code>instanceof</code> can check if a class exists in the current namespace

C<code>instanceof</code> throws a fatal error if used on a non-object variable

D<code>instanceof</code> can be used to check if an object is an instance of a parent class

Step-by-Step Solution

Solution:

Step 1: Review instanceof behavior with null and non-objects
instanceof returns false for null and throws error for non-objects.
Step 2: Check class existence check
instanceof does NOT check if a class exists; use class_exists() instead.
Final Answer:
instanceof can check if a class exists in the current namespace is FALSE -> Option B
Quick Check:
instanceof does not check class existence = D [OK]

Quick Trick: Use class_exists() to check class presence, not instanceof [OK]

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