DiactorosStreamFactory.php

<?php
 
namespace Http\Message\StreamFactory;
 
use Http\Message\StreamFactory;
use Psr\Http\Message\StreamInterface;
use Zend\Diactoros\Stream;
 
final class DiactorosStreamFactory implements StreamFactory
{
    public function createStream($body = null)
    {
        if ($body instanceof StreamInterface) {
            return $body;
        }
 
        if (is_resource($body)) {
            return new Stream($body);
        }
 
        $stream = new Stream('php://memory', 'rw');
        if (null !== $body && '' !== $body) {
            $stream->write((string) $body);
        }
 
        return $stream;
    }
}