根据Codeigniter中的下拉值填充表单

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class FormController extends CI_Controller {
    public function __construct() {
        parent::__construct();
        $this->load->model('country_model');
        $this->load->helper('form');
    }

    public function index() {
        // 获取国家数据
        $data['countries'] = $this->country_model->get_countries();

        // 加载视图，并将国家数据传递给视图
        $this->load->view('form_view', $data);
    }
}

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Country_model extends CI_Model {
    public function get_countries() {
        $query = $this->db->get('countries');
        return $query->result();
    }
}

<?php
echo form_open('submit_controller');
echo form_label('Country:', 'country');
echo form_dropdown('country', $countries, '', 'id="country"');
echo form_submit('submit', 'Submit');
echo form_close();
?>

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Submit_controller extends CI_Controller {
    public function index() {
        $country = $this->input->post('country');
        
        // 在这里可以根据表单提交的数据执行相应的逻辑
    }
}