[Solved] What is the output of the following PHP code?$numbers = [1, 2, 3]; $result = array_map(fn($n) => $n * 2, $numbers); print_r($result); | PHP

PHP - Array Functions

What is the output of the following PHP code?

$numbers = [1, 2, 3];
$result = array_map(fn($n) => $n * 2, $numbers);
print_r($result);

A[2, 4, 6]

B[1, 2, 3]

C[3, 4, 5]

DError: Invalid callback

Step-by-Step Solution

Solution:

Step 1: Understand the callback function
The callback doubles each number: $n * 2.
Step 2: Apply the callback to each element
1*2=2, 2*2=4, 3*2=6, so the new array is [2, 4, 6].
Final Answer:
[2, 4, 6] -> Option A
Quick Check:
Each element doubled = [2, 4, 6] [OK]

Quick Trick: Multiply each element by 2 in the callback [OK]

Common Mistakes:

Master "Array Functions" in PHP

9 interactive learning modes - each teaches the same concept differently

More PHP Quizzes

What is the output of the following PHP code?