Fix missing $prv and $nxt variables in mod/photos

diff --git a/mod/photos.php b/mod/photos.php
index 04d4138fc6cd865429be6a9978f23b0e64e63549..c2b00c734587f012c8e5da17afb1c2412b55df4f 100644 (file)
--- a/mod/photos.php
+++ b/mod/photos.php
@@ -1260,6 +1260,8 @@ function photos_content(App $a)
                        );
 
                        if (DBA::isResult($prvnxt)) {
+                               $prv = null;
+                               $nxt = null;
                                foreach ($prvnxt as $z => $entry) {
                                        if ($entry['resource-id'] == $ph[0]['resource-id']) {
                                                $prv = $z - 1;
@@ -1274,8 +1276,12 @@ function photos_content(App $a)
                                        }
                                }
                                $edit_suffix = ((($cmd === 'edit') && $can_post) ? '/edit' : '');
-                               $prevlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$prv]['resource-id'] . $edit_suffix . ($order_field === 'posted' ? '?f=&order=posted' : '');
-                               $nextlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$nxt]['resource-id'] . $edit_suffix . ($order_field === 'posted' ? '?f=&order=posted' : '');
+                               if (!is_null($prv)) {
+                                       $prevlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$prv]['resource-id'] . $edit_suffix . ($order_field === 'posted' ? '?f=&order=posted' : '');
+                               }
+                               if (!is_null($nxt)) {
+                                       $nextlink = 'photos/' . $a->data['user']['nickname'] . '/image/' . $prvnxt[$nxt]['resource-id'] . $edit_suffix . ($order_field === 'posted' ? '?f=&order=posted' : '');
+                               }
                        }
                }