Get the last modified date of a remote file

Question

I would like to get the last modified date of a remote file by means of curl. Does anyone know how to do that?

Answer 1

Sometimes header come with different upper lower case, this should help:

function remoteFileData($f) {
    $h = get_headers($f, 1);
    if (stristr($h[0], '200')) {
        foreach($h as $k=>$v) {
            if(strtolower(trim($k))=="last-modified") return $v;
        }
    }
}