3v4l.org

run code in 200+ php & hhvm versions
<?php (function() ($a) } echo $a; { echo "Hello World!"; })();
based on Z2lhk
Output for 7.1.25 - 7.4.0beta4
Parse error: syntax error, unexpected '(', expecting '{' in /in/TIo1A on line 2
Process exited with code 255.