3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(substr(substr('8qQpro+ABfT4aXOK7kb5u3Sm=VWJLw6E1GY0xDteyl/ZPid2M9NzcnCRFIUhHgsvj', 10, 0), 0, -10));
based on LrODH
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.13.2, 7.0.0 - 7.3.0beta1
bool(false)
Output for hhvm-3.15.4 - 3.17.3
string(0) ""