Online PHP editor | output for JFrIb

<?php function gen($a = 0) { yield 1; yield 2; yield 3; yield 4; yield 5; } function bar($gen) { yield from $gen; } $gen = gen(); $gens[] = bar($gen); $gens[] = bar($gen); do { foreach ($gens as $g) { echo "Current: "; var_dump($g->current()); // Notice - We are advancing the underlying gen, not either of the things // gens in the array. If we delegate properly, then our other generators // should be implicitly advancing as well. $gen->next(); } } while($gen->valid()); var_dump($gens[1]->valid());