Online PHP editor | refs for VUF2P

<?php ini_set('error_reporting', -1); ini_set('display_errors', 'on'); function generator() { $a = []; if(empty($a)){ return null; } foreach($a as $i){ yield $i; } } if ($generator = generator()) { foreach($generator as $i) { echo $i; } } else { echo 'Nothing'; }