[Solved] Which statement best describes the difference between isset() and empty() in PHP? — Ans: isset() checks if variable exists and is not null; empty() checks if variable... | PHP

PHP - Type Handling

Which statement best describes the difference between isset() and empty() in PHP?

Aempty() only works on arrays; isset() only works on strings

Bisset() returns true for null; empty() returns false for null

Cisset() and empty() behave the same for all variables

Disset() checks if variable exists and is not null; empty() checks if variable is falsy or not set

Step-by-Step Solution

Solution:

Step 1: Understand isset() behavior
isset() returns true if variable exists and is not null.
Step 2: Understand empty() behavior
empty() returns true if variable is not set or has a falsy value (0, '', false, null).
Final Answer:
isset() checks if variable exists and is not null; empty() checks if variable is falsy or not set -> Option D
Quick Check:
isset() vs empty() difference [OK]

Quick Trick: isset() checks existence; empty() checks falsy or unset [OK]

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Which statement best describes the difference between isset() and empty() in PHP?