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[William E. Fisher]

Here is a question from someone (me) who is in way over his head.

I am in search of some help in posting form variables to a third party server from a script. The third party server is PayPal (sandbox) and the post would be the initial variables that are needed to initiate an IPN transaction.

I am trying sockets to connect to the paypal server. I had some success but not yet a complete transaction.

The following code is able to open a socket on the sandbox server and write the post header and data to the server. And I am able to get and read a response from the the sandbox server.

However, I am not able to complete the transaction. 

Despite being logged into developer central, I receive the message "To access the PayPal Sandbox, please log in to PayPal Developer Central. " rather than the payment details page. No activity is recorded in the seller's account, and my ipn script at the notify_url is not hit.

Is someone familiar enough with either using sockets or using paypal that he/she might be able to provide some direction or a solution?

Any help will be much, much, much appreciated.

Thank you.

Bill

Here is the code:

//First I define the variables as key/value pairs in an 
//array called $PayPal_Vars

//Next we need to provide the parameters for the 
//fsockopen() and fputs() functions
foreach ($PayPal_Vars as $key => $value)
{
    $value = stripslashes($value);
    $value = urlencode($value);
    if (!$req)
    {
        $req .= "$key=$value";
    }
    else
    {
        $req .= "&";
        $req .= "$key=$value";
    }
    $req .= "\r\n\r\n";
}

$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Host: www.sandbox.paypal.com\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";


//Finally we need to script the call to the PayPal server 
//and the posting of the data
if ($PayPal_Vars[test_ipn] == 1)
{
    $fp = fsockopen ("www.sandbox.paypal.com", 80, $errno, $errstr, 30);
}
else
{
    $fp = fsockopen ("www.paypal.com", 80, $errno, $errstr, 30);
}

if (!$fp)
{
    return "ERROR";
}
else
{
    $fout = fputs ($fp, $header . $req);
    echo "<br>fout = $fout";

    $tmp_headers = "";
    while ($str = trim(fgets($fp, 4096)))
    {
        $tmp_headers .= $str."\n";
    }

    $tmp_body = "";
    while ($str = trim(fgets($fp, 4096)))
    {
        $tmp_body .= $str."\n";
    }

    fclose($fp);
}
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