<?php namespace Http\Message; use Psr\Http\Message\StreamInterface; /** * Factory for PSR-7 Stream. * * @author Márk Sági-Kazár <mark.sagikazar@gmail.com> */ interface StreamFactory { /** * Creates a new PSR-7 stream. * * @param string|resource|StreamInterface|null $body * * @return StreamInterface * * @throws \InvalidArgumentException If the stream body is invalid. * @throws \RuntimeException If creating the stream from $body fails. */ public function createStream($body = null); }