3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define('$', function($input) { $output = $input; // do something here return $output; }); $n = $(123);
Output for 5.4.0 - 5.4.27
Parse error: syntax error, unexpected '(', expecting variable (T_VARIABLE) or '$' in /in/APDbi on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '(', expecting T_VARIABLE or '$' in /in/APDbi on line 10
Process exited with code 255.