Description:
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I'm trying to send some variables via POST with a socket connection to a HTML form.
The problem: 
The socket connection returns HTML-code from the form, but in the form I can't access the variables I sent (e.g. "go" is not set in $HTTP_POST_VARS and not in the global scope).

I took the sample code from the PHP manual, section "Stream functions", "Example 2. Making a POST request to an https server".

I think it should be no problem, that there are additional GET-parameters in the URI "d_content_kontakt.php" !?

Reproduce code:
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$sock = fsockopen("linux", 80, $errno, $errstr, 30);
$data = 'go='.urlencode('sent');
fputs($sock, "POST /caranet_redesign/d_content_kontakt.php?art_angebot=Gebrauchtwagen&id_haendler=00000002&id_lang=00000001&typ=rm&hersteller=&schlafplaetze=&preis_von=&preis_bis=&id_fahrzeuge=00002158 HTTP/1.0\r\n");
fputs($sock, "Host: linux\r\n");
fputs($sock, "Content-type: application/x-www-url-encoded\r\n");
fputs($sock, "Content-length: " . strlen($data) . "\r\n");
fputs($sock, "Accept: */*\r\n");
fputs($sock, "\r\n");
fputs($sock, "$data\r\n");
fputs($sock, "\r\n");

$headers = "";
while ($str = trim(fgets($sock, 4096)))
  $headers .= "$str\n";

print "\n";

$body = "";
while (!feof($sock))
  $body .= fgets($sock, 4096);

fclose($sock);



Expected result:
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variable "go" should contain "sent", but is not set in d_content_kontakt.php