304 Not Modified issue

Question

Sorry for the probably wrong title. I am writing some code to handle If-Modified-Since and If-None-Match requests as part of caching. Everything works perfect except for tha

Answer 1

Try this code:

$last_modified = filemtime($f);
if(isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
    $expected_modified = strtotime(preg_replace('/;.*$/','',$_SERVER["HTTP_IF_MODIFIED_SINCE"]));
    if($last_modified <= $expected_modified) {
        header("HTTP/1.0 304 Not Modified");
        exit;
    }
}