chunck_size.php

<?php
/**
 * Change get_chunk_size() calculation to correctly calculate limits without
 * letting a zero "unlimited" value always win. Also ensure get_chunk_size()
 * can only return zero if all of the limits were in fact set to unlimited.
*/

$max = 0;

$limits = [100, 200, 300];

foreach ($limits as $limit)
{
	if ($limit > 0)
	{
		$max = ($max !== 0) ? min($limit, $max) : $limit;
	}
}

echo floor($max / 2);