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

PHP - Conditional Statements

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

AAlways returns the second operand regardless of the first.

BReturns the first operand if it exists and is not null; otherwise returns the second operand.

CChecks if both operands are null and returns true if so.

DThrows an error if the first operand is null.

Step-by-Step Solution

Solution:

Step 1: Understand the operator's purpose
The null coalescing operator ?? checks if the left value exists and is not null.
Step 2: Determine the return value
If the left value is null or missing, it returns the right value as a fallback.
Final Answer:
Returns the first operand if it exists and is not null; otherwise returns the second operand. -> Option B
Quick Check:
Null coalescing = first non-null value [OK]

Quick Trick: Think: "Use first value if valid, else fallback" [OK]

Common Mistakes:

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