3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo '\n \ \\ \\\ \1' . "\n \\ \2";
based on pgR6R
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
\n \ \ \\ \1 \ 
Output for hhvm-3.10.0

Process exited with code 153.