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-rw-r--r--Zotlabs/Module/Photo.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/Zotlabs/Module/Photo.php b/Zotlabs/Module/Photo.php
index fe8c47544..48e2bf4a5 100644
--- a/Zotlabs/Module/Photo.php
+++ b/Zotlabs/Module/Photo.php
@@ -221,7 +221,7 @@ class Photo extends \Zotlabs\Web\Controller {
header_remove('Pragma');
- if($_SERVER['HTTP_IF_NONE_MATCH'] === $etag || $_SERVER['HTTP_IF_MODIFIED_SINCE'] === gmdate("D, d M Y H:i:s", $modified) . " GMT") {
+ if((isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] === $etag) || (!isset($_SERVER['HTTP_IF_NONE_MATCH']) && isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $_SERVER['HTTP_IF_MODIFIED_SINCE'] === gmdate("D, d M Y H:i:s", $modified) . " GMT")) {
header_remove('Expires');
header_remove('Cache-Control');
header_remove('Set-Cookie');