Merge pull request #103 from agustingomes/issues/102

Fix deprecation when passing `null` as first parameter to `array_key_exists`

Author: Crell

.github/workflows/quality-assurance.yaml

@@ -20,6 +20,7 @@ jobs:
               with:
                   php-version: ${{ matrix.php }}
                   coverage: xdebug
+                  ini-values: error_reporting=E_ALL
                   tools: composer:v2
             - run: composer install --no-progress ${{ matrix.composer-flags }}
             - run: vendor/bin/phpunit ${{ matrix.phpunit-flags }}

src/Formatter/ArrayBasedDeformatter.php

@@ -236,7 +236,7 @@ public function deserializeObject(mixed $decoded, Field $field, Deserializer $de
             first(static fn (string $name): bool => isset($decoded[$name]))
         );
 
-        if (!array_key_exists($key, $decoded)) {
+        if ($key === null || !array_key_exists($key, $decoded)) {
             return DeformatterResult::Missing;
         }