Avoid no-url index in stream_get_meta_data (#413)

* Avoid no-url index in stream_get_meta_data

* isset instead of check key is exists

Co-authored-by: b.stepanenko <b.stepanenko@densure.ru>

Author: bscheshirwork

src/Utils.php

@@ -317,7 +317,8 @@ public static function streamFor($resource = '', array $options = [])
                  * The 'php://input' is a special stream with quirks and inconsistencies.
                  * We avoid using that stream by reading it into php://temp
                  */
-                if (\stream_get_meta_data($resource)['uri'] === 'php://input') {
+                $metaData = \stream_get_meta_data($resource);
+                if (isset($metaData['uri']) && $metaData['uri'] === 'php://input') {
                     $stream = self::tryFopen('php://temp', 'w+');
                     fwrite($stream, stream_get_contents($resource));
                     fseek($stream, 0);