Install smarty-validate by entering the following commands in the terminal:
sudo apt update sudo apt install smarty-validate
Description:
Server-side form validation plugin for Smarty
smarty-validate is a Smarty plugin that makes it easy to handle server-side form validation in PHP pages using the popular PHP templating engine.
Homepage: http://www.phpinsider.com/php/code/SmartyValidate/
Version: 3.0.3-3
Section: universe/web