CachingIterator::hasNext Example<?php$ait = new ArrayIterator(array('Value 1', 'Value 2', 'Value 3', 'Value 4'));$cit = new CachingIterator($ait);foreach ($cit as $value) { echo $value; //if has a next value, print a comma if ($cit->hasNext()) { echo ', '; }}?>Result: Value 1, Value 2, Value 3, Value 4