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run code in 200+ php & hhvm versions
Bugs & Features
<?php $number = '4XXXXXXX'; var_dump(substr($number, 0, 1)); var_dump(strpos( '123467CF', substr($number, 0, 1) ));
based on uvDPk
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.1.0 - 7.3.0alpha1
string(1) "4" int(3)