Services/Object/classes/class.ilObjectAccess.php

@@ -44,10 +44,11 @@ class ilObjectAccess implements ilWACCheckingClass
      *		array("permission" => "read", "cmd" => "view", "lang_var" => "show"),
      *		array("permission" => "write", "cmd" => "edit", "lang_var" => "edit"),
      *	);
+     * @return array{permission?:string, cmd?:string, lang_var?:string, default?:bool}[]
      */
     public static function _getCommands() : array
     {
-        return [[]];
+        return [];
     }
     
     /**

Services/Style/Content/classes/class.ilObjStyleSheet.php

@@ -3276,7 +3276,7 @@ class ilObjStyleSheet extends ilObject
         );
         $rec = $ilDB->fetchAssoc($set);
         
-        return $rec["value"];
+        return $rec["value"] ?? '';
     }
     
     /**

Services/Taxonomy/classes/class.ilTaxonomyExplorerGUI.php

@@ -20,7 +20,7 @@ class ilTaxonomyExplorerGUI extends ilTreeExplorerGUI
      * @param object|string|array $a_parent_obj
      */
     public function __construct(
-        mixed $a_parent_obj,
+        $a_parent_obj,
         string $a_parent_cmd,
         int $a_tax_id,
         string $a_target_gui,