[Solved] What is the primary purpose of the PHP array_walk function? — Ans: To apply a user-defined function to every element of an array | PHP

PHP - Array Functions

What is the primary purpose of the PHP array_walk function?

ATo filter elements from an array based on a condition

BTo sort an array in ascending order

CTo merge two arrays into one

DTo apply a user-defined function to every element of an array

Step-by-Step Solution

Solution:

Step 1: Understand the role of array_walk
The function applies a callback to each element of the array, modifying or using each element.
Step 2: Compare with other array functions
Sorting, merging, and filtering are done by other functions like sort, array_merge, and array_filter.
Final Answer:
To apply a user-defined function to every element of an array -> Option D
Quick Check:
array_walk purpose = apply function [OK]

Quick Trick: array_walk applies a callback to each array element [OK]

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What is the primary purpose of the PHP array_walk function?