Title: PHP Warning: Undefined array key “expires_in”
Last modified: June 5, 2023

---

# PHP Warning: Undefined array key “expires_in”

 *  Resolved [nicmare](https://wordpress.org/support/users/nicmare/)
 * (@nicmare)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/)
 * Thank you for the great plugin! Works like a charm. I can register/ login with
   facebook and i am done. But i’ve noticed with wp_debug enabled, i get the warning:
 * `PHP Warning: Undefined array key "expires_in" in /…/wp-content/plugins/nextend-
   facebook-connect/providers/facebook/facebook-_client.php_ on line _53_`
 * It occurs when i register first time and when i login with facebook. During login
   i can see the warning in the frontend for one or two seconds.
 * Everything is up to date.
 * Thank you

Viewing 7 replies - 1 through 7 (of 7 total)

 *  Plugin Support [Robert](https://wordpress.org/support/users/robertnextendweb/)
 * (@robertnextendweb)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16793827)
 * Hi [@nicmare](https://wordpress.org/support/users/nicmare/)!
 * I was unable to reproduce this problem on my local test site with full error 
   reporting.
 * We set the “expires_in” key in the $access_token_data array with the default 
   value of “-1”, and later the access token extracted from the response received
   from Facebook should also contain this in the case of both the normal:
   [https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow/#exchangecode](https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow/#exchangecode)
   and long-lived access token too:[https://developers.facebook.com/docs/facebook-login/guides/access-tokens/get-long-lived/](https://developers.facebook.com/docs/facebook-login/guides/access-tokens/get-long-lived/)
 * So this “expires_in” key should be set in any case, yet your error message says
   that there is no such key in the array for some reason.
 * I believe some third party Facebook integration plugin/theme may cause the problem.
   Do you still see those warnings if: you turn off all plugins (including Must-
   use and Drop-In plugins) and use a WordPress default theme, e.g.: Twenty Twenty-
   One?
   If not, start turning them on one by one, then look at the login each time,
   and when the PHP warning comes up again, you’ve found the plugin that has something
   to do with the problem.
 *  Thread Starter [nicmare](https://wordpress.org/support/users/nicmare/)
 * (@nicmare)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16795378)
 * it only happens with facebook. when i take a look into row 83 of facebook-client.
   php and do a error_log(print_r($accessTokenData,1)); i get these keys in the 
   array:
 * Array
   ([access_token] => EAAI0f6ZAQl…[token_type] => bearer)
 * i guess your script is expecting “expires_in” here ?!
 * I disabled all plugins and using blocksy theme only.
 * in other words: the response you get back will overwrite the predefined array
   with its keys. and the response does not contain “expires_in” keys. therefore
   its missing at all. and because there is an “isset” function missing, it prints
   the error. in the end the question might be why the expires_in key is missing.
   i do not know. 🙂
    -  This reply was modified 3 years ago by [nicmare](https://wordpress.org/support/users/nicmare/).
 *  Plugin Support [Laszlo](https://wordpress.org/support/users/laszloszalvak/)
 * (@laszloszalvak)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16796921)
 * Hi [@nicmare](https://wordpress.org/support/users/nicmare/)
 * Yes, exactly this is what seems to happen. But the strange thing is that, the“
   expires_in” key should be returned with the Facebook access token always. Actually
   in the past Facebook had a couple of bug reports for a similar problem:
    - [https://stackoverflow.com/questions/46453312/expires-in-missing-from-facebook-oauth-access-token-response](https://stackoverflow.com/questions/46453312/expires-in-missing-from-facebook-oauth-access-token-response)
 * but back then they fixed that issue. Most likely they reintroduced that bug again,
   however in my case the problem didn’t occur. I even created a completely new 
   App and tried it with that, but that also returned the “expires_in” key value
   pair. So I assume, only certain apps are affected by this problem.
 * Anyways, to be able to handle this issue properly in our code, I need to know
   if your access token without the “expires_in” key will count as a long lived 
   access token or not. So please check the following:
    - Revoke the access token of your App in the Facebook account that you experience
      the problem with. You can revoke access tokens at: 
      [https://www.facebook.com/settings?tab=applications&ref=settings](https://www.facebook.com/settings?tab=applications&ref=settings)(
      but you can also reach this page at Facebook > Settings & privacy > Settings
      > Apps and Websites )
    - once you revoked the access token, open the official Facebook Access Token
      debugger: [https://developers.facebook.com/tools/debug/accesstoken/](https://developers.facebook.com/tools/debug/accesstoken/)
    - in our isAccessTokenLongLived() method within the facebook-client.php file,
      you should check the value of:
      $this->access_token_datae.g. like this:print_r(
      $this->access_token_data);exit;or logging it into the error log like you did.
    - You will get an array like you saw before, and from that you should copy the
      value of the “access_token”.
    - Finally insert the value into the Access Token Debugger and press Debug. That
      should write out the details of your token.
 * Please send me a screenshot of the values that you see in the “Access Token Info”–
   don’t forget to blur the values of the “App ID” and “App-Scoped User ID” in your
   screenshot as this is a public forum. ( If you are not comfortable with sharing
   the details on this forum, feel free to get in touch with us directly over the
   ticket system: [https://nextendweb.com/contact-us/nextend-social-login-support/](https://nextendweb.com/contact-us/nextend-social-login-support/))
 * Best regards,
   Laszlo.
 *  Thread Starter [nicmare](https://wordpress.org/support/users/nicmare/)
 * (@nicmare)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16796975)
 * sure, here you go:
 * > [View post on imgur.com](https://imgur.com/2GagZMm)
 *  Plugin Support [Laszlo](https://wordpress.org/support/users/laszloszalvak/)
 * (@laszloszalvak)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16797095)
 * Thanks [@nicmare](https://wordpress.org/support/users/nicmare/)
 * Your screenshot says:
    - Expiration Date – Never
    - Data access expires 1693816909 (in about 3 months)
 * so for some reason your access token will never expire, although normally user
   access tokens should. I can see other permissions associated with your access
   token as well which are not connected to Nextend Social Login, so I think you
   used the same App for other purposes, too -e.g. something made you request a 
   page access token, and that is what made it not to expire.
 * In the Data access expires row I can see that your have access for about 3 months
   so it already counts as a long lived access token, so we could handle these tokens
   like that by default.
 * So could you check please if you modify the return value of our isAccessTokenLongLived()
   method from this:
 *     ```wp-block-code
       return $this->access_token_data['created'] + $this->access_token_data['expires_in'] > time() + (60 * 60 * 2);
       ```
   
 * to this:
 *     ```wp-block-code
       return isset($this->access_token_data['expires_in']) ? ($this->access_token_data['created'] + $this->access_token_data['expires_in'] > time() + (60 * 60 * 2)) : true;
       ```
   
 * Will that fix the problem? Also does the login work fine like that?
 * Please let me know the results of your experiments, and if everything is fine
   we will add this modifications to our code, too.
 *  Thread Starter [nicmare](https://wordpress.org/support/users/nicmare/)
 * (@nicmare)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16797139)
 * i changed the row accordingly but phpstorm recommends this one:
 * `return ! isset( $this->access_token_data['expires_in'] ) || $this->access_token_data['
   created'] + $this->access_token_data['expires_in'] > time() + ( 60 * 60 * 2 );`
 * so this is what i changed to and tested both actions: registration and login 
   with facebook. **Working good without warnings.** You may want to check it on
   your side with your fb app as well?
 * i am not that familiar with fb / ig api so i do not know why i have no expires_in
   key but i managed to obtain several permissions to do some fancy ig api stuff
   like upload images with code. i assume it has something to do with it. i can 
   remember there was a business account necessary so maybe it relates to this somehow.
 *  Plugin Support [Laszlo](https://wordpress.org/support/users/laszloszalvak/)
 * (@laszloszalvak)
 * [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16797392)
 * Hi [@nicmare](https://wordpress.org/support/users/nicmare/)
 * Thank you for your feedback. That is also fine as it returns true if the “expires_in”
   key is not set in the array, otherwise it returns the value of the comparison.
   The code I suggested also does almost the same just the order is different.
 * If you have other websites where you experience the same problem, feel free to
   make this modification there, too and once we release a new version you can freely
   update, as this modification will be included there, too.
 * Best regards,
   Laszlo.

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘PHP Warning: Undefined array key “expires_in”’ is closed to new replies.

 * ![](https://ps.w.org/nextend-facebook-connect/assets/icon.svg?rev=3336394)
 * [Nextend Social Login and Register](https://wordpress.org/plugins/nextend-facebook-connect/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/nextend-facebook-connect/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/nextend-facebook-connect/)
 * [Active Topics](https://wordpress.org/support/plugin/nextend-facebook-connect/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/nextend-facebook-connect/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/nextend-facebook-connect/reviews/)

 * 10 replies
 * 3 participants
 * Last reply from: [Laszlo](https://wordpress.org/support/users/laszloszalvak/)
 * Last activity: [3 years ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-expires_in/#post-16797392)
 * Status: resolved