Case-insensitive version of array_search()

Question

I have an array like this:

$array = ['oooo', 'no', 'mmmm', 'yes']; 

I'd like to search for a word "yes". I know about array_search(), but I'd like to match "yes", "Yes" and "YES" as well.

How can I do this?

Answer 1

array_search(strtolower($search), array_map('strtolower', $array));