3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump( $a[0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0] ?? $b ?? 'c' );
Output for 7.0.0 - 7.2.0
string(1) "c"
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/9emPr on line 4
Process exited with code 255.