Hi, is possible to use placeholder in the url in PHP Serialized Array?

I try in many kind but nothing... if use CURRENT_USER_ID in $_GET i have nothing.

If i try to have the current user id directly in php i have always '0'.

While if i launch the php page directly i have the id.

When i fire the page.php from wpdatatables the wp user fn dont work.

I need the user id to filter data to serialize.

Please let me know.

This is my code...

require_once('../../../../../wp-blog-header.php');

global $current_user;
write_log(get_current_user_id());

if(isset($_GET['protect_nonce'])){
if($_GET['protect_nonce'] === 'hsgdgyduidoodjhdg63738976463893'){

$search_criteria = array(
   'status'        => 'active',
);


$sorting = array( 'key' => 'date_created', 'direction' => 'DESC' );

$entries = GFAPI::get_entries( 2, $search_criteria, $sorting );

$return_array = array();

foreach($entries as $entry){

$return_array[] = array(
'id' => $entry['id'],
'Nome' => $entry[68],
'Cognome' => $entry[69]

);

}

echo serialize( $return_array );


}
}