<?php
class News_model extends CI_Model{public function __construct(){$this->load->database();}public function get_news($slug = FALSE){if($slug == FALSE){$query = $this->db->get('news'); //获得‘news’数据表，并将结果返回到‘query’变量中return $query->result_array();}$query = $this->db->get_where('news',array('slug' => $slug)); //获得‘news’数据表中主键为‘slug’的数据记录return $query->row_array();}public function set_news(){$this->load->helper('url');$slug = url_title($this->input->post('title'), 'dash', TRUE);$data = array('title' => $this->input->post('title'),'slug' => $slug,'text' => $this->input->post('text'));    return $this->db->insert('news', $data); //将‘data’数据记录插入‘news’数据表中
    }
}

<?php
class News extends CI_Controller {public function __construct() {parent::__construct();$this->load->model('news_model');}public function index(){$data['news'] = $this->news_model->get_news();$data['title'] = 'News archive';$this->load->view('templates/header',$data);$this->load->view('news/index',$data);$this->load->view('templates/footer',$data);}public function view($slug){$data['news_item'] = $this->news_model->get_news($slug);if(empty($data['news_item'])){show_404();}$data['title'] = $data['news_item']['title'];$this->load->view('templates/header',$data);$this->load->view('news/view',$data);$this->load->view('templates/footer');}public function create(){$this->load->helper('form');$this->load->library('form_validation');$data['title'] = 'Create a news item';$this->form_validation->set_rules('title','Title','required');$this->form_validation->set_rules('text','text','required');if ($this->form_validation->run() == FALSE) {$this->load->view('templates/header',$data);$this->load->view('news/create');$this->load->view('templates/footer');    } else {$this->news_model->set_news();$this->load->view('news/success');}}
}

<?php foreach ($news as $news_item): ?><h2><?php echo $news_item['title']?></h2><div id = "main"><?php echo $news_item['text']?></div><p><a href = "http://localhost/citest/index.php/news/<?php echo $news_item['slug']?>">View article</a></p><?php endforeach?>