[Solved] What is the output of the following PHP code? $a = [1, 2]; $b = [3, 4]; $result = array_merge($a, $b); print_r($result); | PHP

PHP - Arrays

What is the output of the following PHP code?

$a = [1, 2];
$b = [3, 4];
$result = array_merge($a, $b);
print_r($result);

A[1, 2, 3, 4]

B[3, 4, 1, 2]

C[1 => 2, 3 => 4]

DArray keys and values combined

Step-by-Step Solution

Solution:

Step 1: Understand array_merge behavior
array_merge joins arrays by appending elements of second array to first, preserving order.
Step 2: Apply to given arrays
$a = [1, 2], $b = [3, 4], merged result is [1, 2, 3, 4].
Final Answer:
[1, 2, 3, 4] -> Option A
Quick Check:
array_merge appends arrays = [1, 2, 3, 4] [OK]

Quick Trick: array_merge appends arrays in order given [OK]

Common Mistakes:

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