Online PHP editor | output for 2BJsO

<?php $rules = [ '1' => '1.2', '5-10' => '6.25', '10-15' => '9.2', '15-20' => '10.9', ]; function costFromWeight($weight, array $newRules): array { $parsed = []; foreach ($newRules as $range => $cost) { if (sscanf($range, '%d-%d', $min, $max) === 1) { $default = [$min, $min, (float) $cost]; } else { $parsed[] = [$min, $max, (float) $cost]; } } $result = ['cost' => 0]; while ($weight > 0) { foreach ($parsed as $i => [$min, $max, $cost]) { if ($weight <= $max) { if (!$i && $weight <= $min) { [$min, $max, $cost] = $default; } break; } } $result[$max] = ($result[$max] ?? 0) + 1; $result['cost'] += $cost; $weight -= $max; } return $result; } foreach ([49, 47.75, 38, 35, 23, 15, 14, 10.5, 4] as $weight) { echo "$weight :: "; print_r(costFromWeight($weight, $rules)); echo "\n---\n"; }