This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. PRADO is an event-driven and component-based framework for Web application development in PHP 5. Components following the PRADO protocol are highly configurable and reusable. Properties defining the basic features of a component can be configured in specifications, templates or code. New components can be developed by either inheriting an existing component class or composing several components together. The work of using a component amounts to placing the component tag on the page template, configuring component properties, and writing handler functions to respond to component events. PRADO shares many similarities with ASP.NET and other RAD tools for Windows GUI development, such as Borland Delphi. In particular, it supports event-driven programming, viewstate maintenance, javascript, template, form validations, etc.