DX: apply rector rulesets up to PHP 73

src/Bundle/ChillMainBundle/Controller/ExportController.php

@@ -665,7 +665,7 @@ class ExportController extends AbstractController
 
         $this->logger->notice('[export] choices for an export unserialized', [
             'key' => $key,
-            'rawData' => json_encode($rawData),
+            'rawData' => json_encode($rawData, JSON_THROW_ON_ERROR),
         ]);
 
         return $rawData;

src/Bundle/ChillMainBundle/Controller/SearchController.php

@@ -109,10 +109,8 @@ class SearchController extends AbstractController
             ->getHasAdvancedFormSearchServices();
 
         if (count($advancedSearchProviders) === 1) {
-            reset($advancedSearchProviders);
-
             return $this->redirectToRoute('chill_main_advanced_search', [
-                'name' => key($advancedSearchProviders),
+                'name' => array_key_first($advancedSearchProviders),
             ]);
         }