changing unique identifier to post_guid

includes/class-wp-push-syndication-server.php

@@ -1195,12 +1195,12 @@ class WP_Push_Syndication_Server {
 
             foreach( $posts as $post ) {
 
-                if( in_array( $post['guid'], $inserted_posts ) ) {
+                if( in_array( $post['post_guid'], $inserted_posts ) ) {
                     wp_update_post( $post, true );
                 } else {
                     $result = wp_insert_post( $post, true );
                     if( !is_wp_error( $result ) )
-                        $inserted_posts[ $result ] = $post['guid'];
+                        $inserted_posts[ $result ] = $post['post_guid'];
                 }
 
             }

includes/class-wp-rss-client.php

@@ -177,7 +177,7 @@ class WP_RSS_Client extends SimplePie implements WP_Client {
                 'post_date'         => date( 'Y-m-d H:i:s', strtotime( $item->get_date() ) ),
                 'comment_status'    => $this->default_comment_status,
                 'ping_status'       => $this->default_ping_status,
-                'guid'              => $item->get_id()
+                'post_guid'              => $item->get_id()
             );
         }