$postFields = array
(
   'var1' => 'xxx',
   'var2' => 'xxx'
);
$result = http_post_fields('http://domain.com/test.php', $postFields);

function HttpRequest( $url, $method = 'GET', $data = NULL, $additional_headers = NULL, $followRedirects = true )
{
    # in compliance with the RFC 2616 post data will not wwwected
    $method = strtoupper($method);
    $url_parsed = @parse_url($url);
    if (!@$url_parsed['scheme']) $url_parsed = @parse_url('http://'.$url);
    extract($url_parsed);
    if(!is_array($data))
    {
        $data = NULL;
    }
    else
    {
        $ampersand = '';
        $temp = NULL;
        foreach($data as $k => $v)
        {
            $temp .= $ampersand.urlencode($k).'='.urlencode($v);
            $ampersand = '&';
        }
        $data = $temp;
    }
    if(!@$port) $port = 80;
    if(!@$path) $path = '/';
    if(($method == 'GET') and ($data)) $query = (@$query)?'&'.$data:'?'.$data;
    if(@$query) $path .= '?'.$query;
    $out = "$method $path HTTP/1.0\r\n";
    $out .= "Host: $host\r\n";
    if($method == 'POST')
    {
        $out .= "Content-type: application/x-www-form-urlencoded\r\n";
        $out .= "Content-length: " . @strlen($data) . "\r\n";
    }
    $out .= (@$additional_headers)?$additional_headers:'';
    $out .= "Connection: Close\r\n\r\n";
    if($method == 'POST') $out .= $data."\r\n";
    if(!$fp = @fsockopen($host, $port, $es, $en, 5)){
       return false;
   }
   fwrite($fp, $out);
    while (!feof($fp)) {
        $s = fgets($fp, 128);
        echo $s;
        if ( $s == "\r\n" ) {
            $foundBody = true;
            continue;
        }
        if ( $foundBody ) {
            $body .= $s;
        } else {
            
            //echo $s;
            
            if(($method != 'POST') and ($followRedirects) and (preg_match('/^Location:(.*)/i', $s, $matches) != false) )
            {
                fclose($fp);
                return HttpRequest( trim($matches[1]) );
            }
            $header .= $s;
            if(preg_match('@HTTP[/]1[.][01x][\s]{1,}([1-5][01][0-9])[\s].*$@', $s, $matches))
            {
                $status = trim($matches[1]);
            }
        }
    }
    fclose($fp);
    return array('head' => trim($header), 'body' => trim($body), 'status' => $status);
}