minor symfony#43062 [Serializer] Don't pass null to preg_match() (derrabus)

This PR was merged into the 4.4 branch.

Discussion
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[Serializer] Don't pass `null` to `preg_match()`

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Part of symfony#41552
| License       | MIT
| Doc PR        | N/A

Calling `preg_match()` on `null` will trigger a deprecation error on PHP 8.1. This issue has been caught by our CI on the 5.4 branch.

Commits
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4e6ea37 [Serializer] Don't pass null to preg_match()

Author: nicolas-grekas

src/Symfony/Component/Serializer/Normalizer/DataUriNormalizer.php

@@ -109,13 +109,13 @@ public function supportsNormalization($data, $format = null)
      */
     public function denormalize($data, $type, $format = null, array $context = [])
     {
-        if (!preg_match('/^data:([a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}\/[a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}(;[a-z0-9\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\\\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i', $data)) {
+        if (null === $data || !preg_match('/^data:([a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}\/[a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}(;[a-z0-9\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\\\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i', $data)) {
             throw new NotNormalizableValueException('The provided "data:" URI is not valid.');
         }
 
         try {
             switch ($type) {
-                case 'Symfony\Component\HttpFoundation\File\File':
+                case File::class:
                     return new File($data, false);
 
                 case 'SplFileObject':

src/Symfony/Component/Serializer/Tests/Normalizer/DataUriNormalizerTest.php

@@ -139,6 +139,7 @@ public function invalidUriProvider()
             ['data:text/html;charset,%3Ch1%3EHello!%3C%2Fh1%3E'],
             ['data:base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'],
             [''],
+            [null],
             ['http://wikipedia.org'],
             ['base64'],
             ['iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'],