Product of all other numbers an array

CalculateProducts.php

<?php

function CalculateProducts($array)
{
    //check if array is undefined 
    if (!$array) {
        return [];
    }
    //check if array has length equal to zero
    if (count($array) == 0) {
        return [];
    }
    //check if array contains 0 or null 
    if (in_array(0, $array)) {
        return [];
    }
    return array_map(function ($element) use ($array) {
        return array_product($array) / $element;
    }, $array);
}

$array =  [4, 5, 10, 2];
print_r(CalculateProducts($array));

Hello @harmlessprince, thank you for participating in Week 4 of Algorithm Fridays.

Decent and efficient solution, kudos to you! I like your edge case checks on line 6 and 10. However, your check shown below on line 14 makes your solution fail one one of the test cases.

   if (in_array(0, $array)) {
        return [];
    }

Because if I run the code snippet below

$initial_array = [4, 3, 0];
echo json_encode(CalculateProducts($initial_array), JSON_PRETTY_PRINT); ❌ // should return [0, 0, 12] but yours returns []

Let me know what you think.

I do not think this assertion is right.

On line 18, if 0 is included in the array, the result of the division will surely return undefined. now trying to use undefined to divide or multiply another number will return NAN.

If you don't mind pointing me to a solution that returns this output you stated , I will be glad to learn from it.