array_find() - A case insensitive array_search() with partial matches

<?php
/**
* Case in-sensitive array_search() with partial matches
*
* @param string $needle The string to search for.
* @param array $haystack The array to search in.
*
* @author Bran van der Meer <branmovic@gmail.com>
* @since 29-01-2010
*/
function array_find($needle, array $haystack)
{
    foreach ($haystack as $key => $value) {
        if (false !== stripos($needle, $value)) {
            return $key;
        }
    }
    return false;
}