The 'Widget logic' field at work in standard widgets.
The widget_content filter and wp_reset_query options are at the foot of the widget admin page. (Both are off by default.)
Although Wordpress started as a small blogging system, it has now become a powerful CMS because but administrating your blog can be quite difficult sometimes. Luckily, there are some plugins that can make your life easier as an administrator.
Creating a custom WordPress meta box lets you make clean UI elements for you and your clients. The default WordPress custom fields are functional, but IMHO, and if you can pull it off, using a WordPress meta box is the way to go. It will give your project that professional touch.
CalPress: Elegant Design & Easy to Use. Calpress Pro has all the features you would expect from a top line Calendar & Event Management Plug-in: A Beautiful User Interface and an Easy to Use Admin Panel with Enhanced Social Sharing! Go here http://www.calpresspro.com/
Since you only want your post meta box to appear on the post editor screen in the admin, you’ll use the load-post.php and load-post-new.php hooks to initialize your meta box code
For any system admin or a manager a paramount important is subject - BACKUP. There are lots of contrib module available for exporting the Drupal database in Drupal 7.