3v4l.org

run code in 500+ PHP versions simultaneously
<?php $it = new ArrayIterator(array("tmp", "foo", "bar", "bazbar")); $it = new RegexIterator($it, "/ba(.)/", RegexIterator::ALL_MATCHES); echo count(iterator_to_array($it));

preferences:
62.68 ms | 2174 KiB | 5 Q