3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface FooInterface { public function foo(FooInterface $foo); } class Bar implements FooInterface { public function foo(FooInterface $foo): FooInterface { return new self(); } } $bar = new Bar(); $result = $bar->foo(new Bar()); var_dump($result);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(Bar)#3 (0) { }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/6HPJ5 on line 9
Process exited with code 255.
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