Are there any best practices to keep in mind when using array_reduce in PHP?

When using array_reduce in PHP, it's important to keep in mind that the callback function should be designed to handle two parameters: the current value being iterated over and the accumulated result. Additionally, it's a good practice to provide an initial value for the accumulator to avoid unexpected results.

// Example of using array_reduce with initial value
$numbers = [1, 2, 3, 4, 5];

// Calculate the sum of all numbers in the array
$sum = array_reduce($numbers, function($carry, $item) {
    return $carry + $item;
}, 0);

echo $sum; // Output: 15