<?php
// generator calls "sub" generators using "yield from"
function foo() {
yield 1;
yield 2;
yield 3;
}
function bar() {
yield 'A';
yield 'B';
yield 'C';
}
function both() {
yield from foo();
yield from bar();
yield 'DONE';
}
$a = both();
foreach ($a as $value) {
echo "$value\n";
}
1 2 3 A B C DONESOURCE CODE