<?php

declare(strict_types=1);

function generator(): iterable
{
    echo "generate 1\n";
    yield 'some text';
    echo "generate 2\n";
    yield 12;
    echo "generate 3\n";
    $i = 1;
    yield $i++;
    echo "generate 4\n";
    yield $i;
}

foreach (generator() as $value) {
    echo "----------\n";
    echo "$value\n";
}