 <?php
 $fibo1 = (function() {
  yield 1;
  yield 2;
  yield from fibo2();
  return 8;
 })();

 function fibo2() {
  yield 3;
  yield 5;
 }

 foreach($fibo1 as $val) {
   echo $val;
 }

 echo $fibo1->getReturn();
 ?>