3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a ??= 'test'; echo $a;
Output for 7.0.0 - 7.1.6
Parse error: syntax error, unexpected '=' in /in/RZ9ir on line 3
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: syntax error, unexpected '=' in /in/RZ9ir:3 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected '?' in /in/RZ9ir on line 3
Process exited with code 255.