1--TEST--
2Stringable is automatically implemented
3--FILE--
4<?php
5
6class Test {
7    public function __toString() {
8        return "foo";
9    }
10}
11
12var_dump(new Test instanceof Stringable);
13var_dump((new ReflectionClass(Test::class))->getInterfaceNames());
14
15class Test2 extends Test {
16    public function __toString() {
17        return "bar";
18    }
19}
20
21var_dump(new Test2 instanceof Stringable);
22var_dump((new ReflectionClass(Test2::class))->getInterfaceNames());
23
24?>
25--EXPECT--
26bool(true)
27array(1) {
28  [0]=>
29  string(10) "Stringable"
30}
31bool(true)
32array(1) {
33  [0]=>
34  string(10) "Stringable"
35}
36