get_default_upload()->size ?? ''; $input = wpcf7_array_flatten( $input ); $input = wpcf7_exclude_blank( $input ); if ( empty( $input ) ) { return true; } $threshold = $this->get_property( 'threshold' ); if ( array_sum( $input ) < $threshold ) { return $this->create_error(); } return true; } }