3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = 'ff'; echo $x ?? "";
Output for hhvm-3.12.0, 7.0.0 - 7.1.0
ff
Output for hhvm-3.10.0
Fatal error: syntax error, unexpected '?' in /in/m9uhe on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/m9uhe on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '?' in /in/m9uhe on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/m9uhe on line 3
Process exited with code 255.