3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo isset($a)?$a:'Test A ok<br>'; echo $b??'Test B ok<br>';
based on jX1cC
Output for 7.0.0 - 7.2.0
Test A ok<br>Test B ok<br>
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/XP7gv on line 4
Process exited with code 255.