3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $i='$i'; var_dump(`for i in {0..9999999} ; do echo $i ; done`);
Output for 5.0.0 - 5.6.28, 7.0.0 - 7.1.0
NULL
Output for hhvm-3.10.0 - 3.12.0
string(60) "Failed to exec: `for i in {0..9999999} ; do echo $i ; done' "
Output for 4.3.0 - 4.4.9
string(0) ""