3v4l.org

run code in 200+ php & hhvm versions
<?php $f = []; echo $f ?? 'foo';
based on eB3F2
Output for hhvm-3.11.1 - 3.21.3, 7.0.0 - 7.4.0beta2
Notice: Array to string conversion in /in/0WGsR on line 4 Array
Output for hhvm-3.22.0
Notice: Array to string conversion in /in/0WGsR on line -1 Array
Output for hhvm-3.10.1
Fatal error: syntax error, unexpected '?' in /in/0WGsR on line 4
Process exited with code 255.
Output for 5.4.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/0WGsR on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/0WGsR 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/0WGsR on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/0WGsR on line 3
Process exited with code 255.