3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $var = ["oi"] ?? ""; echo $var;
based on 9pgGE
Output for 7.0.0 - 7.3.1
Notice: Array to string conversion in /in/eDI1p on line 3 Array
Output for 5.4.2 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/eDI1p on line 2
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/eDI1p on line 2
Process exited with code 255.