regarding Crawl Function

I am writing a crawl function for Vbforum.

I was successful in logging into the website forum.

after that it is redirecting to the index page.

At that point it is asking for username and password again.

I think i need to pass security token. I tried that as well. But i was not successful in crawling the website forum

Could anyone give me any idea or modify the code.

The Below Code is to login into VB Forum
-------------------------------------------
<?php
$username = 'johny';
$password = 'lak8shmi';
$post_fields = array(
'vb_login_username' => $username,
'vb_login_password' => $password,
'do' => "login",
's' => '',
);

$url='http://www.indiancinemafans.com/board/upload/login.php';
$cookie_file='cookie.txt';
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 4);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file); // Write cookie file
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file); // Read cookie file
$data = curl_exec ($ch);
curl_close($ch);
preg_match('%name="securitytoken" value="(.*)"\ /\>%',$data,$security123);
echo $data;
?>
-------------------------------------------


example website where i tried the code :

www.indiancinemafans.com

Forum : Telugu DVD rips.(forum : 11). Can be seen only when logged into forum.

What i want here is. Once i am able to log in. I should be successful in crawling the website. After this code how i should write the code to crawl the website.


Please give some sort of idea or post me any example file.

The rest i will try to manage myself.

regards,
bharan.

 

What u exactly want to do after login in ?

 

i want to crawl the site content and get thread links as well.