fixes #3741

Closes #3741

Merge request studip/studip!2599

app/views/shared/contacts/range.php

@@ -70,7 +70,7 @@
             ?>
             </td>
         </tr>
-        <? if ($range_id == $mvv_contact->range_id && $contact_id == $mvv_contact->contact_id) : ?>
+        <? if ($range_id == $mvv_contact->range_id && ($contact_id ?? null) == $mvv_contact->contact_id) : ?>
             <tr class="loaded-details nohover">
                 <?= $this->render_partial('shared/contacts/details', compact('mvv_contact')) ?>
             </tr>

lib/models/OERMaterial.php

@@ -632,9 +632,9 @@ class OERMaterial extends SimpleORMap
                     $user['contact_type'] = "oercampus";
                 }
                 $user['name'] = $userdata['name'];
-                $user['avatar_url'] = $userdata['avatar'] ?: null;
+                $user['avatar_url'] = $userdata['avatar'] ?? null;
                 $userdata = $user['data'] ? $user['data']->getArrayCopy() : [];
-                $userdata['description'] = $userdata['description'] ?: null;
+                $userdata['description'] = $userdata['description'] ?? null;
                 $user['data'] = $userdata;
                 $user->store();