- print_r: documentation ( source)
- iterator_to_array: documentation ( source)
<?php
$it = new \ArrayIterator(array("foo", "bar", "baz"));
$it2 = new \RegexIterator($it, "/^ba/", \RegexIterator::MATCH, \RegexIterator::INVERT_MATCH);
print_r(iterator_to_array($it2));