3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo(): string { return 'string'; } foo ();
based on XWhDI
Output for hhvm-3.15.4, 7.0.0 - 7.3.0alpha1
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected ':', expecting '{' in /in/bE4l2 on line 3
Process exited with code 255.