CURL and login

Good day,

I need to make CURL get a hash code from a page, and then
use it to perform a POST action, while both of them being
in one session (seperate sessions will not work because of the
hash mismatch).

In the following code, CURL pushes the page into $res variable,
then the explosion part follows and the final hash code is stored in $hash2,
now I need to perform a POST action using $hash2 within the very same
CURL session.

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://www.annaabi.com/');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$res = curl_exec($ch);
curl_exec($ch);

$hash1 = explode('<input type="hidden" value="',$res);
$hash2 = substr($hash1[1],0,32);
echo $hash2;

PHP:

 

I actually got it figured out, sample code @ http://www.php.net/manual/en/function.curl-setopt.php#85956