How to get the user session

[AMAILE]

Hello world,

Please I want to know how to get the logged-in user's session in a frontend page for use it in an external page.
Thank you in advance

[Andreas]

if(TL_MODE == 'FE')
{
  // if a user is logged in
  if(sha1(session_id().(!Config::get('disableIpCheck') ? Environment::get('ip') : '').'BE_USER_AUTH') == Input::cookie('BE_USER_AUTH') && $GLOBALS['feRun'] === 1)
  {
    dump($GLOBALS['_SESSION']);
  }
}