3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $domainNumber = "3"; var_dump(substr($domainNumber, 0, 1)); if (!substr($domainNumber, 0, 1) == '_') { $domainNumber = "_$domainNumber"; } var_dump($domainNumber);
Output for 4.3.0 - 7.2.0
string(1) "3" string(1) "3"