Distinction between Oauth 2 and PHP Core API (PHP SDK)

Hi,

Thank you for your reply.

I'm not able to understand how to make the PHP curl call, what all curl parameters are to be set, etc. I'm not able to understand how to fetch the user auth token using the authorization API:

https://www.dropbox.com/developers/documentation/http/documentation#authorization

I'm using it like this. Please correct me:

$post['response_type'] = 'token';
$post['client_id'] = '6i45k3fi9a1i9an';
$post['redirect_uri'] = get_current_url().'&auth_callback=1';
$url = 'https://www.dropbox.com/oauth2/authorize';
// Set the curl parameters.
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
//Set proxy 
//curl_proxy($ch);
// Turn off the server and peer verification (TrustManager Concept).
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));

curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1');

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// Get response from the server.
$resp = curl_exec($ch); 
r_print($resp);