how to access login user data from an external file? - Joomla! Forum - community, help and support

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i've tried code below , kept on having error require_once() function...

define( '_jexec', 1 );
define( 'jpath_base', realpath(dirname(__file__) ));
define( 'ds', directory_separator );
require_once ( jpath_base .ds.'includes'.ds.'defines.php' );
require_once ( jpath_base .ds.'includes'.ds.'framework.php' );
$mainframe =& jfactory::getapplication('site');
$mainframe->initialise();
//get user information joomla database
$user =& jfactory::getuser();
$session =& jfactory::getsession();

//available params

$user->username;
// $user->name
//$user->id
//$user->email






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