Title: Fatal error: Uncaught TypeError: count() Last modified: April 29, 2022 --- # Fatal error: Uncaught TypeError: count() * [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/) * I sent one of my blogs a manual ping from another using Webmention. Got errors: * Warning: Undefined array key “type” in [snip]wp-content/plugins/semantic- linkbacks/includes/class-linkbacks-mf2-handler.php on line 454
[snip]Lots of these[/snip] Warning: Undefined array key “type” in < b>[snip]wp-content/plugins/semantic-linkbacks/includes/class-linkbacks-mf2-handler. php on line 454

Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in [ snip]wp-content/plugins/semantic-linkbacks/includes/class-linkbacks-mf2-handler. php:399 Stack trace: #0 [snip]wp-content/plugins/semantic-linkbacks/includes/ class-linkbacks-mf2-handler.php(202): Linkbacks_MF2_Handler::flatten_microformats( NULL) #1 [snip]wp-includes/class-wp-hook.php(307): Linkbacks_MF2_Handler::generate_commentdata( Array) #2 [snip]wp-includes/plugin.php(189): WP_Hook->apply_filters(Array, Array)# 3 [snip]wp-content/plugins/semantic-linkbacks/includes/class-linkbacks-handler. php(202): apply_filters(‘semantic_linkba…’, Array) #4 [snip]wp-includes/class- wp-hook.php(307): Linkbacks_Handler::enhance(Array) #5 [snip]wp-includes/plugin. php(189): WP_Hook->apply_filters(Array, Array) #6 [snip]wp-includes/comment.php( 2234): apply_filters(‘preprocess_comm…’, Array) #7 [snip]wp-content/plugins/webmention/ includes/class-webmention-receiver.php(362): wp_new_comment(Array, true) #8 [ snip]wp-includes/rest-api/class-wp-rest-server.php(1141): Webmention_Receiver:: post(Object(WP_REST_Request)) #9 [snip]wp-includes/rest-api/class-wp-rest-server. php(988): WP_REST_Server->respond_to_request(Object(WP_REST_Request), ‘/webmention/ 1.0…’, Array, NULL) #10 [snip]wp-includes/rest-api/class-wp-rest-server.php(414): WP_REST_Server->dispatch(Object(WP_REST_Request)) #11 [snip]wp-includes/rest- api.php(386): WP_REST_Server->serve_request(‘/webmention/1.0…’) #12 [snip]wp- includes/class-wp-hook.php(307): rest_api_loaded(Object(WP)) #13 [snip]wp-includes/ class-wp-hook.php(331): WP_Hook->apply_filters(”, Array) #14 [snip]wp-includes/ plugin.php(522): WP_Hook->do_action(Array) #15 [snip]wp-includes/class-wp.php( 396): do_action_ref_array(‘parse_request’, Array) #16 [snip]wp-includes/class- wp.php(758): WP->parse_request(”) #17 [snip]wp-includes/functions.php(1310): WP->main(”) #18 [snip]wp-blog-header.php(16): wp() #19 [snip]index.php(17): require(‘/ home/sites/22a…’) #20 {main} thrown in [snip]wp-content/plugins/semantic-linkbacks/ includes/class-linkbacks-mf2-handler.php on line 399
Viewing 9 replies - 1 through 9 (of 9 total) * Plugin Author [Matthias Pfefferle](https://wordpress.org/support/users/pfefferle/) * (@pfefferle) * [4 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15605723) * Hey [@lordmatt](https://wordpress.org/support/users/lordmatt/) thanks for the report. * Can you send me the two URLs you used, so that I can debug it? * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15663601) * I could but I’ve disabled the plugin. I’ll set up some test sites and see if the problem persists. If it does, I’ll give you links to examine. * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15663676) * Not seeing the bug on newly set up test sites. Am seeing problems on openmentions. com with only webmention and this plugin active. - This reply was modified 4 years ago by [lordmatt](https://wordpress.org/support/users/lordmatt/). * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15663692) * The only difference I can find is that the problem site has a single filter that targets webmentions. * ``` function handle_other_webmentions($id, $target) { // do nothing if id is set if ($id) { return $id; } // return "default" id if plugin can't find a post/page return 9; } add_filter("webmention_post_id", "handle_other_webmentions", 10, 2); ``` - This reply was modified 4 years ago by [lordmatt](https://wordpress.org/support/users/lordmatt/). - This reply was modified 4 years ago by [lordmatt](https://wordpress.org/support/users/lordmatt/). - This reply was modified 4 years ago by [lordmatt](https://wordpress.org/support/users/lordmatt/). Reason: code formatting aaarh! - This reply was modified 4 years ago by [lordmatt](https://wordpress.org/support/users/lordmatt/). Reason: fffffs * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15663754) * Update: Nope, no error there either. * IDK, I’ll report back only if I can replicate. * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15665544) * And now it is back: * On this page: [https://openmentions.com/topics/conversation-starters/](https://openmentions.com/topics/conversation-starters/) trying to manual ping this URL: [https://matrixdreams.com/blog/games/discussion-what-underrated-game-do-you-wish-got-more-attention/](https://matrixdreams.com/blog/games/discussion-what-underrated-game-do-you-wish-got-more-attention/) * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15665613) * Also observed like this * Page with error: [https://openmentions.com/topics/world-news/europe/uk/](https://openmentions.com/topics/world-news/europe/uk/) Manual ping from: [https://lordmatt.co.uk/reflections/politics/partygate-because-they-think-they-are-better-than-us/](https://lordmatt.co.uk/reflections/politics/partygate-because-they-think-they-are-better-than-us/) * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15669156) * I’ve had to pull this plugin from use again. People were complaining about the error messages. * Thread Starter [lordmatt](https://wordpress.org/support/users/lordmatt/) * (@lordmatt) * [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15669399) * I believe I ha\ve squashed the bug: * I added a forced data type to the problem function which threw a new error. This led me to `public static function generate_commentdata` which calls `public static function get_representative_author`. * I saw that `public static function get_representative_author` can return null but `public static function generate_commentdata` does not check for null on line 202. Thus null gets sent up the stack to the failure point on 339 * I made the following edit which seems to have fixed things. * ``` // check if h-card has an author if ( isset( $properties['author'] ) ) { $author = $properties['author']; } else { $author = self::get_representative_author( $mf_array, $source ); if($author!==null){ $author = self::flatten_microformats( $author ); } } ``` - This reply was modified 4 years ago by [lordmatt](https://wordpress.org/support/users/lordmatt/). Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Fatal error: Uncaught TypeError: count()’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/semantic-linkbacks_93a86a.svg) * [Semantic-Linkbacks](https://wordpress.org/plugins/semantic-linkbacks/) * [Frequently Asked Questions](https://wordpress.org/plugins/semantic-linkbacks/#faq) * [Support Threads](https://wordpress.org/support/plugin/semantic-linkbacks/) * [Active Topics](https://wordpress.org/support/plugin/semantic-linkbacks/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/semantic-linkbacks/unresolved/) * [Reviews](https://wordpress.org/support/plugin/semantic-linkbacks/reviews/) ## Tags * [errors](https://wordpress.org/support/topic-tag/errors/) * 9 replies * 2 participants * Last reply from: [lordmatt](https://wordpress.org/support/users/lordmatt/) * Last activity: [4 years ago](https://wordpress.org/support/topic/fatal-error-uncaught-typeerror-count-2/#post-15669399) * Status: not resolved