3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo(string $bar = null) { var_dump($bar); } foo(123);
based on Ru3On
Output for 7.0.0 - 7.2.0
string(3) "123"
Output for 5.3.21 - 5.6.28
Catchable fatal error: Argument 1 passed to foo() must be an instance of string, integer given, called in /in/GjH9c on line 7 and defined in /in/GjH9c on line 3
Process exited with code 255.