This is a simple snippet that I intent to complexify later. I used it to remove 1000+ posts that were created automatically (via a WordPress plugin) on a Facebook page. It takes a search string and looks for posts matching that string - then it deletes them. Keep in mind that you have to use FB's paging scheme to search through a large number of…

facebook-mass-deleter.php

<?php

       //make sure your page access token has the 'publish_actions' scope
       $access_token = 'YOURACCESSTOKEN';
       $pageid = 'YOURPAGEID';
       //fb graph api only allows this to be up to 100
       $limit = '100';

       //retireve posts on specific page ID:
       $fb_ret_url = 'https://graph.facebook.com/' . $pageid . '/posts?limit=' . $limit . '&access_token=' . $access_token;

       //retrieve the data
       $response = file_get_contents( $fb_ret_url );
       //parse the data
       $response_parsed = json_decode( $response, true );

       //loop through the data and find/delete the posts that match our string in the message field
       //this only searches for matches on the first page of results - for searching everything, look at the $response_parsed['paging'] to get the next and previous page URL's
       $search_string = 'Something to search on..';
       $count = 0;

       foreach ( $response_parsed['data'] as $fbpost ) {
         //switch out $fbpost['message'] with the field that you want to search on - e.g. ['created_time']
         if ( isset( $fbpost['message'] ) ) {
           $found = strpos( $fbpost['message'], $search_string );
           if ( $found !== false ) {
             $delurl = 'https://graph.facebook.com/' . $fbpost['id'] . '?access_token=' . $access_token;
             $ch = curl_init();
             curl_setopt( $ch, CURLOPT_URL, $delurl );
             curl_setopt( $ch, CURLOPT_RETURNTRANSFER, false );
             curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, 'DELETE' );
             $output = curl_exec( $ch );
             curl_close( $ch );

             //check if the operation was succsesful and count
             if ( $output ) {
               $count++;
             }
           }
         }
       }

       //display results
       if ( $count === 1 ) {
         echo '<h1 align="center">' . $count . ' FACEBOOK POST DELETED</h1>';
       } else {
         echo '<h1 align="center">' . $count . ' FACEBOOK POSTS DELETED</h1>';
       }
?>