Get User Details In Joomla

Joomla is a Most Popular Opensource and Content Management System.In this blog we have to get current user details of joomla Login User.

Example code :

$user =& JFactory::getUser();

//print_r($user);

echo $user->username; 

Here JFactory is provides access to a group of core Joomla Objects. and  

$user =& JFactory::getUser(); Means Returns a reference to the 

global user object, only creating it if it 
doesn't already exist.  The object returned will be of type Juser.