if (isset($_POST['addPhotos'])) {
    $obj = new Photos();
    $objFaculty = new Faculties();
    $facultyId = $_POST['facultyId'];
    $faculty = $objFaculty->byId($facultyId);
    $specialty = $_POST['specialityId'];
    $photos = $_FILES['photoFile'];
    $obj->add($photos, $faculty);
}