3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(pow('-7', '3.5'));
Output for 4.3.4 - 7.2.0
float(NAN)
Output for 4.3.3

Process exited with code 137.
Output for 4.3.0 - 4.3.2
float(0.E+79)