3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3,4); echo next($a); echo current($a)===null; echo next($a); echo current($a)===null; echo next($a); echo current($a)===null; echo next($a); echo current($a)===null;

preferences:
37.96 ms | 402 KiB | 5 Q