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@ 2014-10-10T07:19:16Z

<?php
$serverName = "sub.heart.se";
$mainDomainStartPos = strrpos(substr($serverName, 0, -1 + strrpos($serverName, ".")));
echo substr($serverName, $mainDomainStartPos, 100);

Output
Performance
VLD
References
Branches

substr: documentation ( source)
strrpos: documentation ( source)

preferences:dark modelive preview

56.39 ms | 402 KiB | 5 Q