<?php
interface TestInterface {
public function test(): TestInterface;
}
trait TestTrait {
public function test(): TestInterface {
return $this;
}
}
class TestClass implements TestInterface {
use TestTrait;
public function test2() : self {
return $this;
}
}
class TestClass2 extends TestClass {}
$test = new TestClass;
$test2 = new TestClass2;
var_dump($test->test(), $test2->test(), $test2->test2());
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(TestClass)#1 (0) {
}
object(TestClass2)#2 (0) {
}
object(TestClass2)#2 (0) {
}
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.23
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/Wq6oA on line 3
Process exited with code 255.