<?php
function stack(... $items)
{
foreach ($items as $item) {
$next = yield;
if ($next) {
yield from stack(... $next);
}
yield $next;
}
}
$items = [1,2,3];
$stack = stack(...$items);
foreach ($stack as $item) {
if ($item == 1) {
$stack->send(['negate', -$item]);
}
if ($item == 3) {
$stack->send(['exponential', $item ** 2]);
}
var_dump($item);
}
- Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- NULL
NULL
NULL
NULL
NULL
NULL
- Output for 5.6.0 - 5.6.40
- Parse error: syntax error, unexpected 'stack' (T_STRING) in /in/grEUi on line 8
Process exited with code 255.
preferences:
179.56 ms | 401 KiB | 283 Q