Get relationship (friend, friend of friend) between two Facebook ids by facebook api

Question

How can I check for the relation between two facebook ids.? i.e friend, friend of friend or there is no relation. By fql or graph api methods(anything).

I know how to get the friend list, mutual friends of facebook id. But I want a proper method which can give the relation between two Facebook ids. I have Googled a lot but didn't get anything related to my problem.

Answer 1

I got solution by checking with fql queries.

//$target_id=id of user to check relationship
//$source_id=logged in user

    $query="SELECT uid, name, work FROM user WHERE uid IN 
    (SELECT uid2 FROM friend WHERE uid1 = $target_id AND uid2=$source_id)
     ORDER BY name";

    $user_info=$this->facebook->api(array('method'=>'fql.query',
                                'query'=>$query));


    if(!empty($user_info)) 
    {
          $degree='friend';
    }
    else {
        $query="SELECT uid, name, work FROM user WHERE uid IN 
       (SELECT uid2 FROM friend WHERE uid1 IN (SELECT uid2 FROM friend WHERE uid1 = $target_id) AND uid2=$source_id) 
        ORDER BY name";

       $user_info=$this->facebook->api(array('method'=>'fql.query',
                                    'query'=>$query));

    // we can check friend-of-friend for app user friends

       if(!empty($user_info)) {
           $degree='friend-of-friend'; 
       }
    else{
    $degree='none';
    }
    }

Please answer if anyone knows any simple method.