title: How to extend access token validity since offline_access deprecation
body: <p>Since the <code>offline_access</code> <a href="https://developers.facebook.com/docs/authentication/permissions/" rel="nofollow noreferrer">Permission</a> is deprecated in Facebook's <a href="https://developers.facebook.com/docs/authentication/" rel="nofollow noreferrer">Authentication</a> flow, we have problem getting the so called long lived access tokens without that permission.</p>
  <p>In <a href="https://developers.facebook.com/docs/offline-access-deprecation/" rel="nofollow noreferrer">Facebook's document about the deprecation</a> it says, that server side OAuth generated access tokens will be long lived, but they are not.</p>
  <p>Am I missing something? Some setting in app settings? Some special code I need to use to extend expiration time of access tokens? As I understand the documentation, for server side authentication, the access token which can be accessed by <code>getAccessToken()</code> method of PHP SDK when the user is logged in is long lived.</p>