A simple example :
How to use in language like PHP?
Its simple just check out the example below...
Whats new in HTML 5
autofocus - Specifies that a text area should automatically get focus when the page loads.
placeholder-Specifies a short hint that describes the expected value of a text area.
required-Specifies that a text area is required/must be filled out.
If you have any suggestion or something to add please comment so I can implement in my blog.