name : ClientInterface.php <?php namespace Psr\Http\Client; use Psr\Http\Message\RequestInterface; use Psr\Http\Message\ResponseInterface; interface ClientInterface { /** * Sends a PSR-7 request and returns a PSR-7 response. * * @param RequestInterface $request * * @return ResponseInterface * * @throws \Psr\Http\Client\ClientExceptionInterface If an error happens while processing the request. */ public function sendRequest(RequestInterface $request): ResponseInterface; }