public function check_administrator()
 {
     $result = false;
     $username = $_SESSION['username'];
     if (isset($_SESSION['username'])) {
         $dbc = new DbConnexion();
         $c = $dbc->connect();
         $sql = "SELECT * FROM users where login='******'";
         $result = $c->query($sql);
         $login = "";
         $usertype = 0;
         while ($row = $result->fetch_assoc()) {
             $login = $row["login"];
             $usertype = (int) $row["user_type"];
         }
         if ($login == $username && $usertype == 1) {
             $result = true;
         } else {
             $result = false;
         }
     } else {
         $result = false;
     }
     return $result;
 }
<?php 
include '../../security/check_session.php';
include '../../config/connexion.php';
$cs = new CheckSession();
if (!$cs->check_user_session()) {
    header("Location:" . $_SERVER['DOCUMENT_ROOT'] . './index.php');
}
$dbc = new DbConnexion();
$c = $dbc->connect();
?>


<?php 
include '../header.php';
?>

<!-- BEGIN PAGE CONTAINER -->
<div class="page-container">
	<!-- BEGIN PAGE HEAD -->
	<div class="page-head">
		<div class="container">
			<!-- BEGIN PAGE TITLE -->
			<div class="page-title">
				<h1>
					Product Management <small>List, add, delete and update products</small>
				</h1>
			</div>
			<!-- END PAGE TITLE -->
			<!-- BEGIN PAGE TOOLBAR -->
			<div class="page-toolbar">
				<!-- BEGIN THEME PANEL -->