CI是PHP一个比较轻，并且好用的一个框架
分层也是分的比较清晰的一个
这里先展示MODEL 放在application/models 目录下面user_model.php
<?php
class User_model extends CI_Model {
public function __construct() {
//parent::__construct();
$this->load->database();
}
//查询全部的数据
public function getAll(){
$query = $this->db->get(‘staff‘);
echo ‘My-model‘;
echo ‘最后一条sql语句是：‘.$this->db->last_query();
return $query->result_array();
}
//条件的查询
public function GetLastList(){
$query = $this->db->select(‘id,admin‘)
->from(‘b_staff‘)
->where(‘id =‘,8)
//->where(‘id >=‘,8)
//->limit(0,2)
->order_by(‘id desc ‘)
->get();
$rs = $query->result_array();
echo ‘最后一条sql语句是：‘.$this->db->last_query();
return $rs;
}
//添加数据
public function insertUser(){
$data[‘admin‘] = ‘sunzhiiyan0304‘;
$data[‘paw‘] = ‘123456‘;
$insertbool = $this->db->insert(‘staff‘,$data);
return $insertbool;
}
//修改数据
public function UpdateUser(){
$data[‘admin‘] = ‘sunzhiiyan0304‘;
$data[‘paw‘] = ‘123456‘;
$updatebool = $this->db->update(‘staff‘,$data,array(‘id‘=>5));
return $updatebool;
}
//删除
public function DeleteUser(){
$delbool = $this->db->delete(‘staff‘,array(‘id‘=>2));
return $delbool;
}
//查询---通过sql语句，不运用封装
public function shower(){
//装载数据库操作类
$this->load->database();
//装载成功后，会放入超级对象的属性中
//var_dump($this->db);
$sql = "select * from b_staff ";
$rs = $this->db->query($sql); //返回的不是资源，对象
$list = $rs->result(); //这里返回的是数组，然后
/* var_dump($list);
var_dump($this->input);
var_dump($this->db);
var_dump($this->uri);
var_dump($this->lang);
var_dump($this->db->model);
var_dump($this->router);*/
return $list;
}
//新增---通过sql语句，不运用封装
public function insertSql(){
$this->load->database();
// $sql = "select * from b_staff ";
// $rs = $this->db->query($sql); //返回的不是资源，对象
//
// var_dump($rs);
// $list = $rs->result(); //这里返回的是数组，然后
// var_dump($list);
// $_POST[‘name‘] = ‘sunzhiyan‘;
//$name = $this->input->post(‘name‘);
//echo ‘$name=‘.$name;
echo ‘sinmzhiayn‘;
$data[‘admin‘] = ‘SSSSS‘;
$data[‘paw‘] = ‘123456‘;
$sql = "insert into b_staff (admin,paw)values(?,?)";
$this->db->query($sql,$data);
}
}
?>
命名还是有要求的，这里就不细说了，主要讲的是一个分层和调用的问题
下面是application/controllers 目录下面的welcome.php 页面
通过http://localhost/CI0.1/index.php/welcome/index
能够进行访问
同事，要想访问这个aciton下面的其他方法的时候
只要需要在http://localhost/CI0.1/index.php/welcome/index 后面将index改成要访问的action调用方法名即可
<?php if ( ! defined(‘BASEPATH‘)) exit(‘No direct script access allowed‘);
class Welcome extends MY_Controller {
/**
* Index Page for this controller.
*
* Maps to the following URL
* http://example.com/index.php/welcome
* - or -
* http://example.com/index.php/welcome/index
* - or -
* Since this controller is set as the default controller in
* config/routes.php, it‘s displayed at http://example.com/
*
* So any other public methods not prefixed with an underscore will
* map to /index.php/welcome/<method_name>
* @see http://codeigniter.com/user_guide/general/urls.html
*/
public function index()
{
echo ‘-----------------------‘;
//数据库已经自动加载了
//其实这里可以不同加载，因为调用model的时候，只要让构造方法去调用就行了
$this->load->database();
/*
//装载分页类
$this->load->library(‘pagination‘);
//url路由类
$this->load->helper(‘url‘);
//进行配置
//每页显示数据
$page_size = 2;
//配置基础目录
$config[‘base_url‘]= site_url(‘welcome/index‘);
//一共多少条数据
$config[‘total_rows‘] =7;
//首页
$config[‘first_link‘] = ‘SHOU‘;
$config[‘next_link‘] = ‘XIA‘;
//每页显示的数据
$config[‘per_page‘] = $page_size;
$this->pagination->initialize($config);
//输出按钮
echo $this->pagination->create_links();
$offset = intval($this->uri->segment(3));
$rs = $this->db->query($sql);
$list = $rs->result();
var_dump($list);*/
$this->load->model(‘User_model‘);
//查询
$list = $this->User_model->getAll();
//新增
$bool = $this->User_model->insertUser();
//修改
$updatebool = $this->User_model->UpdateUser();
//删除
$delbool = $this->User_model->DeleteUser();
//条件查询
$res = $this->User_model->GetLastList();
//通过sql语句进行查询
$shower = $this->User_model->shower();
//通过sql语句进行新增
$this->User_model->insertSql();
/* var_dump($list);
var_dump($bool);
var_dump($updatebool);
var_dump($delbool);*/
//var_dump($shower);
echo ‘<br>------------------------------------<br>‘;
var_dump($res);
//$this->aabbcc();
$this->load->view(‘welcome_message‘);
}
public function test()
{
echo ‘sunzhiyan111‘;
$this->load->view(‘nihao‘);
}
public function login(){
echo ‘login‘;
echo md5(uniqid());
//加载session
$this->load->library(‘session‘);
$user = array(‘id‘=>3,‘name‘=>‘sunzhiyan‘);
//注册session
$this->session->set_userdata(‘user‘,$user);
//不要在这里获取刚放入的数据
//只有天页面从新加载后才能获取到
}
public function checjlogin(){
$this->load->library(‘session‘);
$this->session->userdata(‘user‘);
var_dump($user);
}
public function code(){
$this->load->helper(‘url‘);
$this->load->helper(‘captcha‘);
$vals = array(
// ‘word‘ => ‘Random word‘, /使用自己定义的字符串/
‘img_path‘ => ‘./captcha/‘, //此目录手动创建
‘img_url‘ => base_url().‘/captcha/‘,
// ‘font_path‘ => ‘./path/to/fonts/texb.ttf‘,
// ‘img_width‘ => ‘150‘,
// ‘img_height‘ => 30,
// ‘expiration‘ => 60*10 //过期时间，时间一到自动删除图片
);
$cap = create_captcha($vals);
echo $cap[‘word‘]; //验证码中的字符串
echo $cap[‘image‘]; //输出验证码
//将验证码放入到session中，验证就通过此相等做
}
}
/* End of file welcome.php */
/* Location: ./application/controllers/welcome.php */
原文：http://www.cnblogs.com/sunxun/p/4314440.html