You can open an HTTP socket connection and send HTTP POST commands. Here is
an example :

<?
// Generate the request header
$ReqHeader =
"POST $URI HTTP/1.1\n".
"Host: $Host\n".
"Content-Type: application/x-www-form-urlencoded\n".
"Content-Length: $ContentLength\n\n".
"$ReqBody\n";

// Open the connection to the host
$socket = fsockopen($Host, 80, &$errno, &$errstr);
if (!$socket)

$Result["errno"] = $errno;
$Result["errstr"] = $errstr;
return $Result;
}
$idx = 0;
fputs($socket, $ReqHeader);
while (!feof($socket))

$Result[$idx++] = fgets($socket, 128);
}
//-------------------------------------------
?>


Or you can use the cURL extensions for PHP (cURL and libcurl). Once you build it and compile their support into PHP, it is fairly easy to do posting stuff (even over https):


<?
$URL="www.mysite.com/test.php";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,"https://$URL");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "Data1=blah&Data2=blah");curl_exec ($ch);
curl_close ($ch);
?>