3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php declare(strict_types=1); function foo (string $bar = null ): string { echo 'test'; }; foo(); foo(null); foo('100');
based on Yuj4l
Output for 7.0.0 - 7.2.0
test Fatal error: Uncaught TypeError: Return value of foo() must be of the type string, none returned in /in/s9V0K:8 Stack trace: #0 /in/s9V0K(10): foo() #1 {main} thrown in /in/s9V0K on line 8
Process exited with code 255.
Output for 5.3.19 - 5.6.21
Warning: Unsupported declare 'strict_types' in /in/s9V0K on line 3 Parse error: syntax error, unexpected ':', expecting '{' in /in/s9V0K on line 6
Process exited with code 255.