3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $hash = ''; var_dump(ctype_xdigit($hash));
Output for 4.4.1 - 4.4.9, 5.1.0 - 7.2.0
bool(false)
Output for 4.3.0 - 4.4.0, 5.0.0 - 5.0.5
bool(true)