function wpbc_print_dialog__show() { ... } . /** * Class WPBC_Listing_Actions__Bulk_Print */ class WPBC_Listing_Actions__Bulk_Print{ const ACTION = 'bulk_print'; /** * Get Action Button * * @return false|string */ public static function get_option() { $css_class = 'ul_dropdown_menu_li_action '; $css_class .= 'ul_dropdown_menu_li_action_' . self::ACTION; // Option Title. $html = "" . esc_js( __( 'Print', 'booking' ) ) . ' '. ''; return $html; } }