Ticket #36860: 46421-6.diff

src/wp-admin/users.php

@@ -234 +234 @@
                         $userids = array_map( 'intval', (array) $_REQUEST['users'] );
                 }
 
-                $users_have_content = false;
-                if ( $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_author IN( " . implode( ',', $userids ) . ' ) LIMIT 1' ) ) {
-                        $users_have_content = true;
-                } elseif ( $wpdb->get_var( "SELECT link_id FROM {$wpdb->links} WHERE link_owner IN( " . implode( ',', $userids ) . ' ) LIMIT 1' ) ) {
-                        $users_have_content = true;
+                /**
+                 * Filter to setup `$users_have_content`, also known as the "users have content" flag,
+                 * before WordPress default checks.
+                 *
+                 * @since 5.2.0
+                 *
+                 * @param bool|null $users_have_content Whether users have content. Default is `null`
+                 *                                      to check if they are post authors or link owners.
+                 * @param int[]     $userids            Array of IDs for users being deleted.
+                 */
+                $users_have_content = apply_filters( 'users_have_content', null, $userids );
+
+                if ( null === $users_have_content ) {
+                        if ( $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_author IN( " . implode( ',', $userids ) . ' ) LIMIT 1' ) ) {
+                                $users_have_content = true;
+                        } elseif ( $wpdb->get_var( "SELECT link_id FROM {$wpdb->links} WHERE link_owner IN( " . implode( ',', $userids ) . ' ) LIMIT 1' ) ) {
+                                $users_have_content = true;
+                        } else {
+                                $users_have_content = false;
+                        }
                 }
 
                 if ( $users_have_content ) {