Also - now that I reread your code when I'm awake:

What's the call to the action for anyway?

The logged in user/guid/is logged in can all be determined through js without an additional call to the server

var user = elgg.get_logged_in_user_entity();

var guid = elgg.get_logged_in_user_guid();

var is_logged = elgg.is_logged_in();

 

See https://github.com/Elgg/Elgg/blob/master/js/lib/session.js#L82

Thanks to all, i've solved some problems but i have a new one.

in my php, action page all ELGG functions work, but not elgg_get_page_owner_entity()

This is my code:

$control_logged_guid = json_decode($_POST['o_guid']);  //recived from elgg.action{...}
$control_owner_guid = json_decode($_POST['l_guid']);

$guid = elgg_get_logged_in_user_guid();

$logged = elgg_get_logged_in_user_entity();

//$owner = elgg_get_page_owner_entity(); DO NOT WORK!!! return false!!

$friends=$logged->getFriends();

$dim=count($friends); 
$logged_name=$logged['name']; 
$logged_icon=$logged->getIcon("small");
$logged_guid=$guid;
$logged_url=$logged->getUrl();




$user_data = array (

'owner_guid'=>$logged_guid, 
'owner_name'=>$logged_name,
'owner_icon_url'=>$logged_icon,
'logged_in_url'=>$logged_url,


);

for($i=0;$i<$dim;$i++){

$friends_data[$i] = array (

'name'=>$friends[$i]["name"],
'icon_url'=>$friends[$i]->getIcon("small"),
'page_url'=>$friends[$i]->getUrl(),
'guid'=>$friends[$i]["guid"],

);
}

$data_array = array ( 

$user_data, $friends_data,

);

echo json_encode($data_array);

when i se in my Chrome Debugger, if i use that function i have this message:

POST http://lare.biz/action/yourplugin/yourfile.php 500 (Internal Server Error)

thx for response.

  Not every page has an owner.  Actions do not have owners.