public function set_featured_trips()
{
$key_array = array();
$custom_model = new Custom_model();
$records = $custom_model->get_featured_trips('p.post_url_key');
if (count($records) > 0) {
foreach ($records as $value) {
$key_array[] = $value['post_url_key'];
}
$this->ci->redis->set('featured_trips', json_encode($key_array));
}
return $key_array;
}