How to make reload page function after submit data in php

I want to make reload page after submitting data, but I got some problem with that, i've tried several ways but it doesn't work. here's my code :

public function prosesTambah() {

    $this->form_validation->set_rules('tgl_date', 'Date', 'trim|required');

    $data   = $this->input->post();


    if ($this->form_validation->run() == TRUE) {

        $result = $this->M_posisi->insert($data);

        if ($result > 0) {
            $out['status'] = '';
            $out['msg'] = show_succ_msg('Add Success!', '20px');

        } else {
            $out['status'] = '';
            $out['msg'] = show_err_msg('Add Failed!', '20px');
        }
    } else {
        $out['status'] = 'form';
        $out['msg'] = show_err_msg(validation_errors());
    }

    echo json_encode($out);
}