3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface Foo { public function getFoo() : string; } class Bar { public function __construct(Foo $foo) {} }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Output for 5.6.0 - 5.6.24
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/7jg8b on line 4
Process exited with code 255.
preferences:
112.74 ms | 406 KiB | 5 Q