php-ci 学习笔记二（mvc）

controller

class Article extends CI_Controller{
		//构造函数
		public function __construct(){
			parent::__construct();
                        //引入数据模型
			$this->load->model(‘article/article_model‘);
			//URL处理函数
			$this->load->helper(‘url_helper‘);
		}
		//默认函数
		public function index(){
			$data[‘article‘]=$this->article_model->get_article();

			$this->load->view(‘templates/header‘,$data);
			$this->load->view(‘article/index‘,$data);
			$this->load->view(‘templates/footer‘,$data);
		}

		//aritcle/url有参数时函数
		public function view($slug=NULL){
			$data[‘article_item‘]=$this->article_model->get_article($slug);
  			//无查询结果时返回404
			if(empty($data[‘article_item‘])){
				show_404();
			}
			$data[‘title‘]=$data[‘article_item‘][‘title‘];

			$this->load->view(‘templates/header‘,$data);
			$this->load->view(‘article/view‘,$data);
			$this->load->view(‘templates/footer‘,$data);
		}

		public function create(){
			//表单处理
			$this->load->helper(‘form‘);
			$this->load->library(‘form_validation‘);

		    //验证获取的表单数据
			$this->form_validation->set_rules(‘title‘,‘Title‘,‘required‘);
			$this->form_validation->set_rules(‘content‘,"Content",‘required‘);
			$this->form_validation->set_rules(‘tag‘,"Tag",‘required‘);

			//表单验证不同结果返回不同页面
			if($this->form_validation->run()===FALSE){
				$this->load->view(‘templates/header‘,$data);
			        $this->load->view(‘article/create‘,$data);
				$this->load->view(‘templates/footer‘,$data);
			}else{
				$this->article_model->set_article();
				$this->load->view(‘article/success‘);
			}
		}

	}

Model

在application/config/database.php中修改好数据库连接

        	class Article_model extends CI_Model{
		public function __construct(){
                        //载入database
			$this->load->database();
		}
                //查
		public function get_article($slug=FALSE){
                        //无查询参数时
			if($slug===FALSE){
				$query=$this->db->get(‘article‘);
				return $query->result_array();
			}

			$query=$this->db->get_where(‘article‘,array(‘id‘=>$slug));
			return $query->row_array();
		}
                //增
		public function set_article(){
			$this->load->helper(‘url‘);
			//url_title用于将字符串 中的所有空格替换成连接符（-），并将所有字符转换为小写
			$slug=url_title($this->input->post(‘title‘),‘dash‘,TRUE);

			$data=array(
				‘title‘=>$this->input->post(‘title‘),
				//‘slug‘=>$slug,
				‘content‘=>$this->input->post(‘content‘)
			);

			return $this->db->insert(‘article‘,$data);
		}
	}
   

view

        //验证错误信息
        echo validation_errors();
        //调用article控制器下的create方法
        echo form_open(‘article/create‘);
        ...