Title: PHP Warning
Last modified: October 13, 2021

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# PHP Warning

 *  Resolved [eva73](https://wordpress.org/support/users/eva73/)
 * (@eva73)
 * [4 years, 5 months ago](https://wordpress.org/support/topic/php-warning-315/)
 * Im getting this error: [host ebshop.dk] Backend log: PHP Warning: array_key_exists()
   expects parameter 2 to be array, null given in /var/www/ebshop.dk/public_html/
   wp-content/plugins/facebook-for-woocommerce/includes/Feed/FeedConfigurationDetection.
   php on line 122\n
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-warning-315%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  [Jeremy Pry](https://wordpress.org/support/users/jpry/)
 * (@jpry)
 * [4 years, 5 months ago](https://wordpress.org/support/topic/php-warning-315/#post-14974768)
 * Hi [@eva73](https://wordpress.org/support/users/eva73/),
 * That message in your log is just a warning, not an error. Could you tell me where
   you are seeing it, meaning is this in a particular log file? Are there other 
   messages as well related to the Facebook for WooCommerce extension?
 * That kind of error should only happen if there is an unusual response from the
   Facebook API. If it just happens a few times, then it shouldn’t be something 
   to be concerned about. But if it is happening regularly, that’s something that
   we should investigate.

Viewing 1 replies (of 1 total)

The topic ‘PHP Warning’ is closed to new replies.

 * ![](https://ps.w.org/facebook-for-woocommerce/assets/icon.svg?rev=3469606)
 * [Meta for WooCommerce](https://wordpress.org/plugins/facebook-for-woocommerce/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Jeremy Pry](https://wordpress.org/support/users/jpry/)
 * Last activity: [4 years, 5 months ago](https://wordpress.org/support/topic/php-warning-315/#post-14974768)
 * Status: resolved