private function create_student($row)
 {
     $obj = new student();
     $obj->setstudentId($row["student_Id"]);
     $obj->setFirstName($row["FirstName"]);
     $obj->setLastName($row["LastName"]);
     $obj->setDob(new \DateTime($row["dob"]));
     $obj->setGender($row["gender"]);
     $obj->setUsername($row["UserName"]);
     $obj->setPassword($row["password"]);
     $obj->setapproved($row["approved"]);
     return $obj;
 }