Online PHP editor | output for 9Qgul

<?php function count_to_ten() { yield 1; yield 2; yield from [3, 4]; yield from 0 => new ArrayIterator([5, 6]); yield from seven_eight(); return yield from nine_ten(); } function seven_eight() { yield 7; yield from eight(); } function eight() { yield 8; } function nine_ten() { yield 9; return 10; } $gen = count_to_ten(); foreach ($gen as $k => $num) { echo "$k -> $num \n"; } echo $gen->getReturn();