<?php function greatestIndexWhereValueLessThan($haystack, $needle) { foreach ($haystack as $key => $value) { if ($value >= $needle) { break; } } return $key ?? null; } echo greatestIndexWhereValueLessThan([30, 60, 90, 120, 360], 73); echo "\n"; echo greatestIndexWhereValueLessThan([30, 60, 90, 120, 360], 4);
You have javascript disabled. You will not be able to edit any code.