PHP Snippet 1:
<?php
class Index extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->helper('url_helper');
$this->load->model('countries_model');
}
public function index() {
$query = $this->db->query('SELECT id,name FROM countries');
$data['countries'] = $query->result_array();
$this->load->view('index/index', $data);
}
public function cities() {
$country_id = $this->input->post('country_id');
$query = $this->db->query('SELECT id,name FROM cities WHERE country_id=' . $country_id);
$data['cities'] = $query->result_array();
$this->load->view('index/cities', $data);
echo $country_id;
}
}
PHP Snippet 2:
<?php
class Countries_model extends CI_Model {
public function __construct() {
$this->load->database();
}
}
PHP Snippet 3:
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Dymanic Selects</title>
<script type="text/javascript" src="<?php echo base_url(); ?>js/jquery.js" ></script>
<script type="text/javascript">
$(document).ready(function(){
$('#sl_countries').change(function(){
$('#sl_cities').load("<?php echo site_url('index/cities') ?>",{country_id:$(this).val()});
});
});
</script>
</head>
<body>
<label>Countries</label>
<select id="sl_countries">
<?php foreach($countries as $c):?>
<option value="<?php echo $c['id']?>"><?php echo $c['name']?></option>
<?php endforeach;?>
</select>
<label>Cities</label>
<select id="sl_cities"></select>
</body>
</html>
PHP Snippet 4:
<?php foreach ($cities as $c): ?>
<option value="<?php echo $c['id'] ?>"><?php echo $c['name'] ?></option>
<?php endforeach; ?>
PHP Snippet 5:
<select id="sl_countries">
<?php foreach($countries as $c):?>
<option value="<?php echo $c['id']?>"><?php echo $c['name']?></option>
<?php endforeach;?>
</select>
