diff options
| -rw-r--r-- | lib/action.php | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/lib/action.php b/lib/action.php index 812df635e..45ce56ac0 100644 --- a/lib/action.php +++ b/lib/action.php @@ -819,9 +819,8 @@ class Action extends HTMLOutputter // lawsuit } if ($lm) { header('Last-Modified: ' . date(DATE_RFC1123, $lm)); - $if_modified_since = $_SERVER['HTTP_IF_MODIFIED_SINCE']; - if ($if_modified_since) { - $ims = strtotime($if_modified_since); + if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) { + $ims = strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']); if ($lm <= $ims) { $if_none_match = $_SERVER['HTTP_IF_NONE_MATCH']; if (!$if_none_match || |