Given $arr = [5, 6, 7, 8], which code snippet correctly splits the array into chunks of size 3 and pads the last chunk at the beginning with the string "start" to reach size 3?

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PHP - Array Functions

Given $arr = [5, 6, 7, 8], which code snippet correctly splits the array into chunks of size 3 and pads the last chunk at the beginning with the string "start" to reach size 3?

A$chunks = array_chunk($arr, 3); $chunks[count($chunks)-1] = array_pad($chunks[count($chunks)-1], 3, "start");

B$chunks = array_chunk($arr, 3, true); $chunks[count($chunks)-1] = array_pad($chunks[count($chunks)-1], 3, "start");

C$chunks = array_chunk($arr, 3); $chunks[count($chunks)-1] = array_pad($chunks[count($chunks)-1], -3, "start");

D$chunks = array_chunk($arr, 3); $chunks[count($chunks)] = array_pad($chunks[count($chunks)], -3, "start");

Step-by-Step Solution

Solution:

Step 1: Split array into chunks of size 3
array_chunk($arr, 3) creates chunks.
Step 2: Pad last chunk at start
array_pad with negative size pads at the beginning.
Step 3: Correct indexing
Last chunk index is count($chunks)-1.
Final Answer:
$chunks = array_chunk($arr, 3); $chunks[count($chunks)-1] = array_pad($chunks[count($chunks)-1], -3, "start"); uses negative size for padding at start correctly.
Quick Check:
Negative size pads at start [OK]

Quick Trick: Negative size pads at start of array [OK]

Common Mistakes:

Using positive size to pad at start
Incorrect chunk index access
Using array_chunk third parameter unnecessarily

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Given $arr = [5, 6, 7, 8], which code snippet correctly splits the array into chunks of size 3 and pads the last chunk at the beginning with the string "start" to reach size 3?

Step 1: Split array into chunks of size 3

Step 2: Pad last chunk at start

Step 3: Correct indexing

Final Answer:

Quick Check:

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