public function addSubject() { $this->load->model('Subjects_model'); $p = new Academic_year_model(); $p->subject_code = $this->input->post('subject_code'); $p->subject_title = $this->input->post('subject_title'); $result = $p->addSubject(); if (!$result) { echo mysqli_error($result); } else { if ($this->session->userdata('role_id') == 0) { redirect('admin', 'refresh'); } else { redirect('staff', 'refresh'); } } }