batch function

functions.inc.php

<?php

function batch(
    iterable  $items,
    callable  $exec,
    ?callable $flush = null,
    int       $batchSize = 20,
): void
{
    $current = 0;
    foreach ($items as $item) {
        $exec($item);

        $current++;

        if ($current % $batchSize === 0) {
            if ($flush) {
                $flush($current);
            }
        }
    }

    if ($flush) {
        $flush($current);
    }
}


batch(
    items: [4, 3, 2, 1],
    exec: fn(int $item) => var_dump('handling item', $item),
    flush: fn(int $index) => var_dump('flush at index', $index),
    batchSize: 2
);