Solution:Step 1: Filter keys greater than 4 firstUse array_filter with ARRAY_FILTER_USE_BOTH to filter by keys.Step 2: Sort filtered array by keys ascendingApply ksort() after filtering to sort keys ascending.Final Answer:$filtered = array_filter($data, fn($v, $k) => $k > 4, ARRAY_FILTER_USE_BOTH);

[Solved] Given this array: $data = [5 => 'bird', 3 => 'cat', 7 => 'dog']; You want to sort it by keys ascending but only keep keys greater than 4. Which code correctly does this? | PHP

PHP - Arrays

Given this array:

$data = [5 => 'bird', 3 => 'cat', 7 => 'dog'];

You want to sort it by keys ascending but only keep keys greater than 4. Which code correctly does this?

Asort($data); $filtered = array_filter($data, fn($v, $k) => $k > 4, ARRAY_FILTER_USE_BOTH);

Barsort($data); $filtered = array_filter($data, fn($v, $k) => $k > 4, ARRAY_FILTER_USE_BOTH);

Csort($data); $filtered = array_filter($data, fn($v) => $v > 4);

D$filtered = array_filter($data, fn($v, $k) => $k > 4, ARRAY_FILTER_USE_BOTH); ksort($filtered);

Step-by-Step Solution

Solution:

Step 1: Filter keys greater than 4 first
Use array_filter with ARRAY_FILTER_USE_BOTH to filter by keys.
Step 2: Sort filtered array by keys ascending
Apply ksort() after filtering to sort keys ascending.
Final Answer:
$filtered = array_filter($data, fn($v, $k) => $k > 4, ARRAY_FILTER_USE_BOTH); ksort($filtered); -> Option D
Quick Check:
Filter keys first, then ksort() [OK]

Quick Trick: Filter keys first, then sort keys with ksort() [OK]

Common Mistakes:

Sorting before filtering
Filtering values instead of keys
Using sort() which resets keys

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Given this array:

Step 1: Filter keys greater than 4 first

Step 2: Sort filtered array by keys ascending

Final Answer:

Quick Check:

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