bug symfony#29183 [HttpKernel] Fix collecting uploaded files (ro0NL)

This PR was squashed before being merged into the 4.2-dev branch (closes symfony#29183).

Discussion
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[HttpKernel] Fix collecting uploaded files

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | symfony#29178
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Commits
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a439681 [HttpKernel] Fix collecting uploaded files

Author: nicolas-grekas

src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/request.html.twig

@@ -143,7 +143,7 @@
                             <tr>
                                 <th scope="col">File Name</th>
                                 <th scope="col">MIME Type</th>
-                                <th scope="col text-right">Size (bytes)</th>
+                                <th scope="col" class="text-right">Size (bytes)</th>
                             </tr>
                         </thead>
                         <tbody>

src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php

@@ -13,6 +13,7 @@
 
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpFoundation\Cookie;
+use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpFoundation\ParameterBag;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -58,15 +59,20 @@ public function collect(Request $request, Response $response, \Exception $except
         }
 
         $requestFiles = array();
-        foreach ($request->files->all() as $files) {
-            foreach ($files as $fileName => $fileData) {
-                $requestFiles[] = array(
-                    'name' => $fileData->getClientOriginalName(),
-                    'mimetype' => $fileData->getMimeType(),
-                    'size' => $fileData->getSize(),
-                );
+        $extractFiles = function (array $files) use (&$extractFiles, &$requestFiles) {
+            foreach ($files as $file) {
+                if ($file instanceof UploadedFile) {
+                    $requestFiles[] = array(
+                        'name' => $file->getClientOriginalName(),
+                        'mimetype' => $file->getMimeType(),
+                        'size' => $file->getSize(),
+                    );
+                } elseif (\is_array($file)) {
+                    $extractFiles($file);
+                }
             }
-        }
+        };
+        $extractFiles($request->files->all());
 
         $sessionMetadata = array();
         $sessionAttributes = array();