<?
function head($url)
{
    $purl = parse_url($url);
    $port = (isset($purl['port'])) ? $purl['port'] : 80;
    $fp = fsockopen($purl['host'], $port, $errno, $errstr, 10);
    if (!$fp) {
        return false;
    }
    $path = (!empty($purl['path'])) ? $purl['path'] : '/';

    fputs($fp, "HEAD $path HTTP/1.0\r\n");
    fputs($fp, "Host: " . $purl['host'] . "\r\n");
    fputs($fp, "Connection: close\r\n\r\n");

    $response = rtrim(fgets($fp, 4096));
    if(preg_match("|^HTTP/[^\s]*\s(.*?)\s|", $response, $status)) {
        $headers['response_code'] = $status;
    }
    $headers['response'] = $response;

    while ($line = fgets($fp, 4096)) {
        if (!trim($line)) {
            break;
        }
        if (($pos = strpos($line, ':')) !== false) {
            $header = substr($line, 0, $pos);
            $value  = trim(substr($line, $pos + 1));
            $headers[$header] = $value;
        }
    }
    fclose($fp);
    return $headers;
}
$ar = head('http://www.sql.ru/images/bigeyes.gif');
echo "<pre>";
print_r($ar);
echo "</pre>";
echo "Filesize: ".$ar['Content-Length'];
?>