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run code in 200+ php & hhvm versions
Bugs & Features
<?php $code = "en-h-us"; var_dump(substr($code, strrpos($code, "-")+1));
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
string(2) "us"