[Solved] What is the output of the following PHP code?$numbers = [1, 2, 3, 4, 5]; $filtered = array_filter($numbers, fn($n) => $n > 3); print_r($filtered); | PHP

PHP - Array Functions

What is the output of the following PHP code?

$numbers = [1, 2, 3, 4, 5];
$filtered = array_filter($numbers, fn($n) => $n > 3);
print_r($filtered);

AArray ( [1] => 2 [2] => 3 [3] => 4 )

BArray ( [3] => 4 [4] => 5 )

CArray ( [0] => 4 [1] => 5 )

DArray ( [0] => 1 [1] => 2 [2] => 3 )

Step-by-Step Solution

Solution:

Step 1: Understand the callback condition
The callback keeps numbers greater than 3, so 4 and 5 remain.
Step 2: Check array keys in output
array_filter preserves original keys, so keys 3 and 4 remain with values 4 and 5.
Final Answer:
Array ( [3] => 4 [4] => 5 ) -> Option B
Quick Check:
array_filter preserves keys = Array with keys 3 and 4 [OK]

Quick Trick: array_filter keeps original keys unless reindexed [OK]

Common Mistakes:

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