3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $var1 = "1"; $var2 = "2"; function foo() { global $var1, $var2; var_dump($var1 ?? $var2); } foo();
based on UginM
Output for 7.0.0 - 7.2.0
string(1) "1"
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/t69Tr on line 8
Process exited with code 255.