3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?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() { foreach (self::$a as $i) { yield $i; } self::$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'; }
based on EdknC
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
ABCDEFGHIJKLMNOPQRSTUVWXYZNothing