ShvedAn
6/11/2013 - 5:51 AM

LastModified & 304

LastModified & 304

$LastModified_unix = 1294844676; // время последнего изменения страницы
$LastModified = gmdate("D, d M Y H:i:s \G\M\T", $LastModified_unix);
$IfModifiedSince = false;
if (isset($_ENV['HTTP_IF_MODIFIED_SINCE']))
    $IfModifiedSince = strtotime(substr($_ENV['HTTP_IF_MODIFIED_SINCE'], 5));  
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']))
    $IfModifiedSince = strtotime(substr($_SERVER['HTTP_IF_MODIFIED_SINCE'], 5));
if ($IfModifiedSince && $IfModifiedSince >= $LastModified_unix) {
    header($_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified');
    exit;
}
header('Last-Modified: '. $LastModified);