Unexpected results when using PHP's array_column with multidimensional arrays in PHP 8.1
I've encountered a strange issue with I'm encountering unexpected results when using the `array_column` function on a multidimensional array in PHP 8.1. I have an array of user data, and I want to extract the 'email' field from each user. Here’s a sample of what my array looks like: ```php $users = [ ['id' => 1, 'name' => 'Alice', 'email' => 'alice@example.com'], ['id' => 2, 'name' => 'Bob', 'email' => 'bob@example.com'], ['id' => 3, 'name' => 'Charlie', 'email' => null], ['id' => 4, 'name' => 'David', 'email' => 'david@example.com'], ]; ``` When I use `array_column` to get the emails like this: ```php $emails = array_column($users, 'email'); ``` I expect to get an array of emails. However, what I actually receive is: ``` Array ( [0] => alice@example.com [1] => bob@example.com [2] => [3] => david@example.com ) ``` The null value for Charlie appears in the result, which I didn’t anticipate. I expected it to be omitted completely. I’ve tried filtering the array before using `array_column`, but that adds unnecessary complexity: ```php $filtered_users = array_filter($users, function($user) { return !is_null($user['email']); }); $emails = array_column($filtered_users, 'email'); ``` This works, but I’m curious if there’s a more elegant way to handle this directly within `array_column`. Is it possible to omit null values during the extraction process or is filtering the only approach? Any insight into whether there's a more efficient method or if I'm missing something would be greatly appreciated! This issue appeared after updating to Php 3.10. What would be the recommended way to handle this?