As of version 2.3, Widget Wrangler requires PHP 5.3 or higher
Widget Wrangler is a plugin for WordPress that gives administrators a clean interface for managing widgets on a page by page basis. On each page, you can control what widgets appear where.
Widget Wrangler provides the following features:
Widgets as a post type
PHP in widgets
Custom Widget templates
Control Widget visibility on any page (or post type)
Control Widget visibility globally (Display Logic)
Alter WordPress Sidebar HTML
Shortcodes for Widgets
Compatible with almost any existing WordPress Widget