Online PHP editor | output for EdknC

<?php ini_set('error_reporting', -1); ini_set('display_errors', 'on'); class Foo { private static $a; public function __construct() { self::$a = range('A', 'Z'); } public function generator() { self::$a = array_reverse(self::$a); while(self::$a) { yield array_pop(self::$a); } } } $foo = new Foo; $generator = $foo->generator(); if ($generator->valid()) { foreach($generator as $i) { echo $i; } } else { echo 'Nothing'; } $generator = $foo->generator(); if ($generator->valid()) { foreach($generator as $i) { echo $i; } } else { echo 'Nothing'; }