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A simple example of MVC for getting started with CI framework

高洛峰

Dec 12, 2016 am 09:05 AM

This article describes a simple example of MVC for getting started with the CI framework. Share it with everyone for your reference, the details are as follows:

The simplest CI model:

Note: The model needs to use a database

The configuration file is in appcation/config.php

Here we need to use the database, and we need to use databases. Fill in the relevant parameters in php and won’t go into details.

Go directly to the topic:

MVC:

1. Let’s talk about the “M” model first

The model in CI is stored in the application/models folder

The naming rule is: class name_model.php

file Contains only one class:

Such as:

class Nb_model extends CI_Model {
 public function __construct()
 {
  //连接数据库
  $this->load->database();
 }
 public function get(){
   //查询数据库
   $query=$this->db->get(&#39;users&#39;);
   //以数组形式返回查询结果
   return $query->result_array();
 }
}

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2. Next, talk about "C"

With the database model and its methods, then we should extract the data

The controller in CI is stored in the application

Naming rules in the /controllers folder: class name.php

For example:

//防止非法访问
if ( ! defined(&#39;BASEPATH&#39;)) exit(&#39;No direct script access allowed&#39;);
class Nb extends CI_Controller {
  public function __construct()
  {
    parent::__construct();
        //加载数据模型
    $this->load->model(&#39;nb_model&#39;);
  }
  public function index()
  {
    //根据数据模型获取数据
    $data[&#39;nb&#39;]=$this->nb_model->get();
    //加载视图文件
    $this->load->view(&#39;nb&#39;,$data);
  }
}
//文件末尾注释
/* End of file nb.php */
/* Location: ./application/controllers/nb.php */

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3. Finally, let’s talk about “V”

With the database model and its methods, then we should extract the data

Controllers in CI are stored in the application/controllers folder.

Naming rules: class name.php (of course it does not need to be a class name, as long as it is consistent with the name of the view parameter in the controller)

For example ：

<html>
  <head>
    <title>CI heiilo world</title>
  </head>
  <body>
    <!--循环输出数据-->
    <?php foreach($nb as $v):?>
      <h1><?=$v[&#39;email&#39;]?></h1>
    <?php endforeach?>
  </body>
</html>

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