Codeigniter function to update facebook user

fb_updateuser.php

	function update_user($goto = '')
	{
		$this->load->model('app_m');
		try {			
			$user = $this->facebook->api('me'); 
			$this->apps_m->update_userdata($user);			
			$this->session->set_userdata('me', $user);
			$this->session->set_userdata('fb_access_token', $this->facebook->getAccessToken());	
    	} catch (FacebookApiException $e) { 
			$code = @$_GET['code'];
			if($code)
			{			
				$acc = $this->facebook->getAccessTokenFromCode($code);
				$this->facebook->setAccessToken($acc);
				$user = $this->facebook->api('me');
				$this->apps_m->update_userdata($user);
				try {
					$user = $this->facebook->api('me'); 			
					$this->session->set_userdata('me', $user);
					$this->session->set_userdata('fb_access_token', $this->facebook->getAccessToken());
				}catch(FacebookApiException $e) {
					redirect($goto,'refresh');
				}
			}
			
			
			redirect($goto,'refresh'); 
		}
		
		redirect($goto,'refresh');
	}