Case-insensitive array search

Question

I have an array like this:

$array = Array ( 0 => 'oooo',                  1 => 'no',                  2 => 'mmmm',                   3 => '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));