<?php

/*
    I removed the other cookies from this portion of the script, https://website/CookieAuth.dll?GetLogon?curl=Z2FPagesZ2Fschedule.aspx&reason=2&formdir=9 does not set any upon the first visit.  I would assume they were left over from a previous session.
*/
$ch = curl_init();

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookie.txt');

curl_setopt($ch, CURLOPT_URL, "https://website/CookieAuth.dll?Logon");
curl_setopt($ch, CURLOPT_POST, true);

$useragent="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1";
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);

$data = array(
    'username' => 'test',
    'password' => 'test',
    'curl' => 'Z2FPagesZ2Fschedule.aspx',
    'flags' => '0',
    'forcedownlevel' => '0',
    'formdir' => '9',
    'trusted' => '0',
    'SubmitCreds' => 'Log On'
);

curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
$output = curl_exec($ch);

print_r($output);

/*
Response:

HTTP/1.1 302 Moved Temporarily
Location: https://website/Pages/schedule.aspx
Set-Cookie: cadataF91BF9412BC9459AA2FC649721433C28="0cda9a35c-7777-46e1-be68-55475880a284KglOJh0EX2CMqruImGA1XMiSkXQLrOVBMGSHSszFMugcbfuNN3vOz7AjUw1ul7iI9KSZbTDGFU7iUHzwq4zqG9VAQmLCIEejQR60MInt6/M="; HttpOnly; Domain=website; secure; path=/
Content-Length: 0
Connection: close

HTTP/1.1 302 Moved Temporarily
Location: https://website/CookieAuth.dll?GetLogon?curl=Z2FPagesZ2Fschedule.aspx&reason=2&formdir=9
Set-Cookie: cadataF91BF9412BC9459AA2FC649721433C28=; Domain=website; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Connection: close
Content-Length: 0

HTTP/1.1 200 OK
Connection: close
Content-Length: 8341
Content-Type: text/html
Pragma: no-cache
Cache-control: no-cache,max-age=0,must-revalidate

*/
?>