[Solved] What does the null coalescing operator ?? do in PHP? — Ans: Returns the first operand if it is not null, otherwise returns the second... | PHP

PHP - Operators

What does the null coalescing operator ?? do in PHP?

AReturns the first operand if it is not null, otherwise returns the second operand.

BReturns true if both operands are null.

CChecks if a variable is set and throws an error if not.

DAssigns null to a variable if it is not already set.

Step-by-Step Solution

Solution:

Step 1: Understand the operator's purpose
The null coalescing operator ?? checks if the left value is null.
Step 2: Determine the returned value
If the left value is not null, it returns that; otherwise, it returns the right value.
Final Answer:
Returns the first operand if it is not null, otherwise returns the second operand. -> Option A
Quick Check:
Null coalescing operator returns first non-null value [OK]

Quick Trick: Remember: returns first non-null value [OK]

Common Mistakes:

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What does the null coalescing operator ?? do in PHP?