Online PHP editor | output for tE7A4

<?php interface bird { function setKind(string $type); /*function getKind(); function getLocation(); function setLocation(location $location); function flyTo(location $location); function setMelody(string $melody); function singMelody(); // вывод зависит от kind function killBird();*/ function cloneBird(int $count); } class Sparrow implements bird { public function cloneBird(int $count) { echo $count; } public function setKind(string $type) { echo $type; } } $s = new Sparrow(); $s->cloneBird(3); $s->setKind(3);