session - How can I restrict an external script to users that are logged in as an Administrator? -

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i creating new page getting redirected administrator page in joomla 2.5.the page getting displayed when type url in browser . need restrict view such can visible when administrator logs account . can me on ?

this code: 

define( '_jexec', 1 ); define('jpath_base', dirname(__file__) );//this when in root define( 'ds', directory_separator ); require_once ( jpath_base .ds.'includes'.ds.'defines.php' ); require_once ( jpath_base .ds.'includes'.ds.'framework.php' );  $app = jfactory::getapplication('site'); $user = jfactory::getuser(); if ($app->isadmin()) echo 'running joomla administrator site <br/>';  //$app->isadmin() through null value  print_r($user);  echo $user->username;

when login site code works when login using administrator interface code display's null value. don't know why. there mistake in it? output when login using administrator interface:

   juser object    (        [isroot:protected] =>         [id] => 0        [name] =>         [username] =>         [email] =>         [password] =>         [password_clear] =>         [usertype] =>         [block] =>         [sendemail] => 0        [registerdate] =>         [lastvisitdate] =>         [activation] =>         [params] =>         [groups] => array        (         )         [guest] => 1        [lastresettime] =>         [resetcount] =>

when login site user site (member login) this:

       juser object       (           [isroot:protected] =>            [id] => 2           [name] => name of user           [username] => username           [email] => username@gmail.com           [password] => 695c263968014c89bbf3159aa4:yobwr6uzmubmcqfj5hpzcip7a6mayd           [password_clear] =>            [usertype] =>            [block] => 0           [sendemail] => 1           [registerdate] => 2014-11-24           [lastvisitdate] => 2014-11-25 15:29:45           [activation] =>            [params] => {}           [groups] => array           (               [2] => 2           )            [guest] => 0

i suffering problem last 8 days. can me this..

be sure you're loading joomla start (see this question @ joomla stackexchange),

update added complete script.

save code in php file located in root of joomla folder. work, , you'll see output. there, can adapt it's location , such work whatever you're trying accomplish.

if (!defined('_jexec')) {     define( '_jexec', 1 );     define('jpath_base', realpath(dirname(__file__)));     require_once ( jpath_base .'/includes/defines.php' );     require_once ( jpath_base .'/includes/framework.php' ); } defined('ds') or define('ds', directory_separator); $app = jfactory::getapplication('site'); $user = jfactory::getuser(); $groups = $user->groups;  if ($app->issite()) echo 'running joomla front end site<br/>'; if ($app->isadmin()) echo 'running joomla administrator site <br/>'; if($user->id) {     echo $user->username.' logged in<br/>';     if (isset($groups[8])) echo " - user super user <br/>";     if (isset($groups[7])) echo " - user administrator <br/>";     if (isset($groups[6])) echo " - user manager <br/>"; }else{     echo 'not logged in<br/>'; }  if(!isset($groups[7])) die("you must administrator run this");

variation use in \administrator

if (!defined('_jexec')) {     define( '_jexec', 1 );     define('jpath_base', realpath(dirname(__file__)));     require_once ( jpath_base .'/includes/defines.php' );     require_once ( jpath_base .'/includes/framework.php' );     defined('ds') or define('ds', directory_separator); }  //$app = jfactory::getapplication('site'); $app = jfactory::getapplication('administrator'); if ($app->issite()) echo 'running joomla front end site<br/>'; if ($app->isadmin()) echo 'running joomla administrator site <br/>';  $user = jfactory::getuser(); if($user->id) {     echo $user->username.' logged in<br/>';     $groups = $user->groups;     if(isset($groups[8])) {         die("you super user - administrators can run this");         // superuser coding here     }elseif(isset($groups[7])) {         die("you administrator - can run this");         // admin coding here     } }else{     echo 'not logged in<br/>'; }

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