3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?hh echo 'Hello World';
Output for hhvm-3.10.0 - 3.12.0
Hello World
Output for 5.4.34 - 5.6.9
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/Casnm on line 2
Process exited with code 255.
Output for 5.3.0 - 5.4.32
<?hh echo 'Hello World';