3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump( (string)array_shift($a=[array_sum([substr("4", 1)])]){6});
based on fcADf
Output for 7.0.0 - 7.2.0
Notice: Only variables should be passed by reference in /in/BXs0v on line 3 string(0) ""
Output for 5.4.2 - 5.6.28
Parse error: syntax error, unexpected '{' in /in/BXs0v on line 3
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/BXs0v on line 3
Process exited with code 255.