<?php
abstract class Foo {
abstract public function test();
}
class Bar extends Foo {
public function test(): Foo {
return $this;
}
}
var_dump((new Bar())->test());
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
object(Bar)#1 (0) {
}
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/51JjN on line 8
Process exited with code 255.