3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { static function bar() : self { return new static(); } } class Qux extends Foo { /* At runtime this is here: static function bar() : self { return new static(); } */ } var_dump(Foo::bar(), Qux::bar());
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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
object(Foo)#1 (0) { } object(Qux)#2 (0) { }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/tqZpu on line 4
Process exited with code 255.
preferences:
131.8 ms | 1487 KiB | 4 Q