iterate() method

Syntax

$iterable = function () {
yield 1;
yield 2;
// …
};

use Symfony\Component\Console\Helper\ProgressBar;

$progressBar=newProgressBar($output);

foreach ($progressBar->iterate($iterable) as $value) {
// … do some work
}

Non countable variable

foreach ($progressBar->iterate($iterable, 100) as $value) {
// … do some work
}