prevent php8 warnings, fixes #4369

Closes #4369

Merge request studip/studip!3168

app/views/materialien/files/index.php

@@ -109,7 +109,7 @@
                 $pagination->set_attribute('num_postings', $count);
                 $pagination->set_attribute('page', $page);
                 // ARGH!
-                $page_link = reset(explode('?', $controller->action_url('index'))) . '?page_files=%s';
+                $page_link = explode('?', $controller->action_url('index'))[0] . '?page_files=%s';
                 $pagination->set_attribute('pagelink', $page_link);
                 echo $pagination->render("shared/pagechooser");
                 ?>

lib/models/MvvFile.php

@@ -92,7 +92,7 @@ class MvvFile extends ModuleManagementModel
      */
     public function getRangeType()
     {
-        if ($this->ranges) {
+        if (count($this->ranges) > 0) {
             return $this->ranges[0]->range_type;
         }
         return '';