// See if the client has provided the required headers.
// Always convert the provided header into GMT timezone to allow comparing to the server-side last-modified header
$modified_since = !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])
- ? gmdate('D, d M Y H:i:s \G\M\T', strtotime(stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE'])), true)
+ ? gmdate('D, d M Y H:i:s \G\M\T', strtotime(stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE'])))
: false;
$none_match = !empty($_SERVER['HTTP_IF_NONE_MATCH'])
? str_replace('"', '', stripslashes($_SERVER['HTTP_IF_NONE_MATCH']))