Online PHP editor | output for MMCL3

@ 2018-05-21T10:09:23Z

<?php

declare(strict_types=1);

interface Response {}

interface Request {}

class RespImpl implements Response {}

class ReqImpl implements Request {}

interface Psr {
    public function sendRequest(Request $request): Response;
}

interface Httplug {
    public function sendRequest(Request $request);
}

//interface PsrBridge extends Psr, Httplug {} // does work
interface PsrBridge extends Httplug, Psr {} // does not work

class HttpClient implements PsrBridge {
    public function sendRequest(Request $request): Response {
        return new RespImpl();
    }
}

$client = new HttpClient();
$response = $client->sendRequest(new ReqImpl());
echo $response instanceof Response ? 'OK' : 'Fail!';

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.14: Fatal error: Declaration of Httplug::sendRequest(Request $request) must be compatible with Psr::sendRequest(Request $request): Response in /in/MMCL3 on line 18
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: Fatal error: Declaration of Httplug::sendRequest(Request $request) must be compatible with Psr::sendRequest(Request $request): Response in /in/MMCL3 on line 22
Process exited with code 255.
Output for 5.6.0 - 5.6.40: Warning: Unsupported declare 'strict_types' in /in/MMCL3 on line 3 Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/MMCL3 on line 14
Process exited with code 255.

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