How To Make Form Validation Codeigniter? - php

Question

I want to make form validation on codeigniter
this is the code from alternatif.php on controller
class Alternatif extends CI_Controller
{
public function __construct()
{
parent::__construct();
$this->load->library('form_validation');
$this->load->model("Alternatif_model");
$this->load->model("User_model");
if (!$this->session->userdata('email')) {
redirect('auth');
}
$data['user'] = $this->db->get_where('users', ['email' => $this->session->userdata('email')])->row_array();
}
public function tambahAlternatif()
{
$data['title'] = 'Tambah Alternatif';
$data['user'] = $this->db->get_where('users', ['email' => $this->session->userdata('email')])->row_array();
if ($this->input->post('nambahAlternatif')) {
foreach ($this->input->post() as $key => $value) {
if (strpos($key, "id_aspek_teknik-") !== false) {
$k = str_replace('id_aspek_teknik-', '', $key);
$this->Alternatif_model->tambahNilai($k);
}
}
$this->Alternatif_model->tambahAlternatif();
$this->session->set_flashdata('flash', 'ditambahkan');
redirect('alternatif');
} else {
code
}
}
I want to ask where I can add the form validation on codeigniter?

Answer 1

Add validation on Controller like:
public function tambahAlternatif()
{
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
if ($this->form_validation->run() == FALSE)
{
// this block working when get error
$this->load->view('myform');
}
else
{ // when success
$this->load->view('formsuccess');
}
}
check official documentation here
Use this code on your view file (where your form was submitted) <?php echo validation_errors(); ?> it return your errors
Note: this validation errors on view file only work for PHP version <=7.3. PHP v8 not supported