3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $var1 = "1"; $var2 = "2"; function foo() { var_dump($GLOBALS['var3'] ?? $GLOBALS['var2']); } foo();
based on lBYGr
Output for 7.0.0 - 7.2.0
string(1) "2"
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/h6lRG on line 7
Process exited with code 255.