/**
* Recursively search an array for a value and return the key
*/
public static function array_search_recursive($needle, $haystack)
{
foreach ($haystack as $key => $value) {
$currentKey = $key;
if ($needle === $value or is_array($value) && ZuhaSet::array_search_recursive($needle, $value) !== false) {
return $currentKey;
}
}
return false;
}
