3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $serverName = ".heart.se"; $mainDomainStartPos = strrpos(substr($serverName, 0, -1 + strrpos($serverName, ".")), '.'); echo substr($serverName, $mainDomainStartPos, 100);
based on 1c8hn
Output for 4.3.0 - 7.2.0
.heart.se