Online PHP editor | output for djZu7

<?php class FizzBuzz { const THREE = __LINE__; const FOUR = __LINE__; const FIVE = __LINE__; const FIFTEEN = __LINE__; public function main() { for($i = (int) true;$i <= self::FIFTEEN;$i++) { ob_start(); $this->f($i); $this->b($i); if (ob_get_contents() == false) { echo $i; } echo PHP_EOL; } } private function f($i) { if ($i % self::THREE == false) { echo substr(__CLASS__, false, self::FOUR); } } private function b($i) { if ($i % self::FIVE == false) { echo substr(__CLASS__, self::FOUR, self::FOUR); } } } (new FizzBuzz())->main();