3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $p = null; $action = $p ?? 'index_null'; echo $action."\n"; $p = false; $action = $p ?? 'index_false'; echo $action."\n"; $p = 0; $action = $p ?? 'index_zero'; echo $action."\n"; $p = "0"; $action = $p ?? 'index_0'; echo $action."\n";
based on H670h
Output for 7.0.0 - 7.2.0
index_null 0 0
Output for 5.3.18 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/HtfYK on line 3
Process exited with code 255.