public function getPages($menu_id)
 {
     if (empty(self::$conn)) {
         self::$conn = $this->connect_pdo();
     }
     $sql = "SELECT p.id,p.name,p.des,p.image_icon,p.des,p.time_on,CONCAT_WS(' ',first_name,last_name) AS user_name,p.author_id\n\t\t\t\t\tFROM pages AS p \n\t\t\t\t\tLEFT JOIN page_menu AS pmn\n\t\t\t\t\t\tON p.id=pmn.page_id \n\t\t\t\t\tLEFT JOIN users AS u\n\t\t\t\t\t\tON u.id=p.author_id\n\t\t\t\t\tWHERE pmn.menu_id =?";
     $stmt = self::$conn->prepare($sql);
     $stmt->bindParam(1, $menu_id);
     $stmt->execute();
     $stmt->setFetchMode(PDO::FETCH_ASSOC);
     $i = 0;
     $pages = array(array());
     while ($row = $stmt->fetch()) {
         $pages[$i++] = $row;
     }
     $i--;
     return $pages;
 }
 public function delete($id)
 {
     // Connect to database ...
     if (empty(self::$conn)) {
         self::$conn = $this->connect_pdo();
     }
     $stmt = self::$conn->prepare('DELETE FROM menu WHERE id=?');
     $stmt->bindParam(1, $id);
     if ($stmt->execute()) {
         return true;
     } else {
         return false;
     }
 }