[Solved] What does the PHP function array_filter do to an array? — Ans: It keeps only the elements where the callback returns true. | PHP

PHP - Array Functions

What does the PHP function array_filter do to an array?

AIt removes all keys from the array.

BIt keeps only the elements where the callback returns true.

CIt changes all values to strings.

DIt sorts the array in ascending order.

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of array_filter
The function array_filter tests each element with a callback function.
Step 2: Determine what happens based on callback result
Elements for which the callback returns true are kept; others are removed.
Final Answer:
It keeps only the elements where the callback returns true. -> Option B
Quick Check:
array_filter keeps elements with true callback [OK]

Quick Trick: Remember: true keeps, false removes elements [OK]

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What does the PHP function array_filter do to an array?