Why will this only work using "HTTP/1.0" and not "HTTP/1.1".

function get_url ($domain, $path) {
$fp = fsockopen($domain, 80);
if ($fp) {

$fputs_str = "GET ".$path." HTTP/1.1nr";
$fputs_str .= "Host: ".$domain."nr";
$fputs_str .= "Accept: text/plain, text/htmlnr";
$fputs_str .= "Accept-Language: danr";
$fputs_str .= "Connection: closenr";

fputs($fp, $fputs_str);

while (!feof($fp)) {
$ret_str .= fgets($fp, 5000);
}

print $fputs_str;
fclose($fp);
return $ret_str;
}
}