Online PHP editor | output for v0Gao

<?php function yieldFrom($iter) { $isSubgenerator = $iter instanceof Generator; $received = null; $send = true; while ($iter->valid()) { if ($isSubgenerator) { $next = $send ? $iter->send($received) : $iter->throw($received); } else { $next = $iter->current(); $iter->next(); } try { $received = yield $next; $send = true; } catch (Exception $e) { if ($isSubgenerator) { $received = $e; $send = false; } else { throw $e; } } } return $isSubgenerator ? $iter->getReturn() : null; }; function gen1() { yield 1; yield 2; yield 3; } $g = gen1(); $x = yieldFrom($g); foreach($x as $val) { var_dump($val); }