3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 'a'; $b = 'b'; $c = new stdclass; $c->prop = 'property'; echo $x ?? $c->none ?? $c->prop;
based on nCmvp
Output for 7.0.0 - 7.2.0
property
Output for 5.3.18 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/n8ojt on line 9
Process exited with code 255.