Is is possible in PHP to autologin using php

See more:

PHP

Facebook-API

can any one suggest
is there any possiblity to autologin in fb using any API in which we can pass Username or Password, APP_ID or APP_SECRET.

Reply ASAP.
-----------------------
Thanks
I have implement following code

<?php
  $app_id = "xxx";
  $app_secret = "xxxx";
  echo $app_id;
  function post_url($url, $params)
  {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params, null, '&'));
  $ret = curl_exec($ch);
  echo $ret;
  curl_close($ch);
  return $ret;
 }
  function get_app_access_token($app_id, $secret)
  {
  $url = 'https://graph.facebook.com/oauth/access_token';
  $token_params = array("type" => "client_cred","client_id" => $app_id,"client_secret" => $secret );
  return str_replace('access_token=', '', post_url($url, $token_params));
 }
$token = get_app_access_token($app_id,$app_secret);
echo $token;
  ?>