3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo { public function foo(): void {} public function bar(?string $string): ?bool {} }
Output for 7.1.0 - 7.1.6
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Foo has a deprecated constructor in /in/nCVrF on line 3 Fatal error: Constructor Foo::foo() cannot declare a return type in /in/nCVrF on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/nCVrF on line 5
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: Syntax only allowed in Hack files (<?hh) or with -v Eval.EnableHipHopSyntax=true in /in/nCVrF:5 Stack trace: #0 {main}
Process exited with code 255.
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/nCVrF on line 4
Process exited with code 255.