[Solved] Which of the following is the correct syntax to use array_reduce in PHP? — Ans: array_reduce(array $array, callable $callback, mixed $initial = null) | PHP

PHP - Array Functions

Which of the following is the correct syntax to use array_reduce in PHP?

Aarray_reduce(mixed $initial = null, array $array, callable $callback)

Barray_reduce(callable $callback, array $array, mixed $initial = null)

Carray_reduce(array $array, mixed $initial = null, callable $callback)

Darray_reduce(array $array, callable $callback, mixed $initial = null)

Step-by-Step Solution

Solution:

Step 1: Recall the official function signature
The correct order is array, callback, then optional initial value.
Step 2: Check each option's parameter order
Only array_reduce(array $array, callable $callback, mixed $initial = null) matches the correct order and types.
Final Answer:
array_reduce(array $array, callable $callback, mixed $initial = null) -> Option D
Quick Check:
array first, callback second, initial last [OK]

Quick Trick: Remember: array first, callback second, initial last [OK]

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Which of the following is the correct syntax to use array_reduce in PHP?