3v4l.org

run code in 200+ php & hhvm versions
<?php class Foo { public function yyy(): void{} } class Bar extends Foo { public function yyy(){} }
Output for 7.0.0 - 7.3.1
Fatal error: Declaration of Bar::yyy() must be compatible with Foo::yyy(): void in /in/N4LNb on line 11
Process exited with code 255.
Output for hhvm-3.11.1 - 3.22.0
Output for hhvm-3.10.1
Fatal error: Syntax only allowed in Hack files (<?hh) or with -v Eval.EnableHipHopSyntax=true in /in/N4LNb on line 5
Process exited with code 255.
Output for 5.1.0 - 5.6.38
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/N4LNb on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/N4LNb on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/N4LNb on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/N4LNb on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/N4LNb on line 5
Process exited with code 255.