+/*
+ * If a JSON blob of navigation menu data is found, expand it and inject it
+ * into `$_POST` to avoid PHP `max_input_vars` limitations. See #14134.
+ */
+if ( isset( $_POST['nav-menu-data'] ) ) {
+ $data = json_decode( stripslashes( $_POST['nav-menu-data'] ) );
+ if ( ! is_null( $data ) && $data ) {
+ foreach ( $data as $post_input_data ) {
+ // For input names that are arrays (e.g. `menu-item-db-id[3]`), derive the array path keys via regex.
+ if ( preg_match( '#(.*)\[(\w+)\]#', $post_input_data->name, $matches ) ) {
+ if ( empty( $_POST[ $matches[1] ] ) ) {
+ $_POST[ $matches[1] ] = array();
+ }
+ // Cast input elements with a numeric array index to integers.
+ if ( is_numeric( $matches[2] ) ) {
+ $matches[2] = (int) $matches[2];
+ }
+ $_POST[ $matches[1] ][ $matches[2] ] = wp_slash( $post_input_data->value );
+ } else {
+ $_POST[ $post_input_data->name ] = wp_slash( $post_input_data->value );
+ }
+ }
+ }
+}