Which of the following is the correct way to call array_walk on an array $data using a callback function named processItem?

easy📝 Syntax Q3 of 15

PHP - Array Functions

Which of the following is the correct way to call array_walk on an array $data using a callback function named processItem?

Aarray_walk($data, 'processItem');

Barray_walk('processItem', $data);

Carray_walk($data, processItem());

Darray_walk(processItem, $data);

Step-by-Step Solution

Solution:

Step 1: Understand array_walk syntax
The correct syntax is array_walk(array, callback).
Step 2: Identify correct callback usage
The callback function name should be passed as a string without parentheses.
Final Answer:
array_walk($data, 'processItem'); -> Option A
Quick Check:
Callback as string, array first parameter [OK]

Quick Trick: Callback function name as string, array first [OK]

Common Mistakes:

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