. * * To disable strict typing, comment out the directive below. */ declare(strict_types=1); function raindrops(int $number): string { $res = ""; if (!($number % 3)) { $res .= "Pling"; } if (!($number % 5)) { $res .= "Plang"; } if (!($number % 7)) { $res .= "Plong"; } if (!$res) { $res = "$number"; } return $res; }