3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = null; $base = 1024; isset($foo) ?? echo 'nop';
based on vll3S
Output for 7.0.0 - 7.0.1
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/4CRX8 on line 5
Process exited with code 255.
Output for 5.3.21 - 5.6.16
Parse error: syntax error, unexpected '?' in /in/4CRX8 on line 5
Process exited with code 255.