各种demo——CI框架学习

各种demo——CI框架学习

 

寒假学习一下CI框架，请各位多多指教！

一.CI的HelloWorld！

注意：CI禁止直接通过文件目录来访问控制器。

 ./application/controllers/hello.php
 1 <?php
 2 //放止用户直接通过路径来访问控制器，如果这样的话会显示找不到（封装）
 3 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 4
 5 class Hello extends CI_Controller {
 6
 7     public function sayhello($name,$name2){
 8         echo $name,",Hello CI to ",$name2;
 9     }
10 }

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" alt="" />

二.CI的文本计时器demo——文本操作与调用视图操作

调用视图的基本格式：

$this->load->view('XXX');

 1 <?php
 2 //./applications/controllers/hello.php
 3 //放止用户直接通过路径来访问控制器，如果这样的话会显示找不到（封装）
 4 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 5
 6 class Hello extends CI_Controller {
 7
 8     public function sayhello($name,$name2){
 9         echo $name,",Hello CI to ",$name2;
10     }
11
12     public function show(){
13         $name = "deng";
14         @$count = file_get_contents('./num.txt');  //装饰器
15         $count = $count ? $count:0;
16         $count++;
17         $data = array('key'=>$name,'value'=>$count);
18
19         $re = fopen('./num.txt','w');
20         fwrite($re, $count);
21
22         $this->load->view("testview.php",$data);   //装载两个视图页面
23         $this->load->view("testview2.php");
24     }
25 }

三.CI的数据库demo——对数据模型的增，删，改，查

数据模型——

1.数据模型是一个数据库类

2.一个模型针对一张表

创建一个模型必须注意——

必须继承数据核心类CI_Model，同时重载父类中的构造方法

class Model_name extends CI_Model
{
    function __construct()
    {
        parent::__construct();
    }
}

对数据库的操作——

1.连接数据库（$this->load->database());

2.插入数据（$this->db->insert($t_name,$arr);)

$t_name——你要操作的表]

$arr——你要插入的数据("key"=>value)

3.更新数据

$this->db->where(字段名，字段值)

$this->db->update(表名，修改值的数组)

4.查询数据

$this->db->where(字段名，字段值)

$this->db->select(字段)

$query = $this->db->get(表名)

return $query->result();

5.删除数据

$this->db->where(字段名，字段值)

$this->db->delete(表名)

 1 ./application/controllers/user.php
 2 <?php
 3 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 4
 5 class User extends CI_Controller {
 6
 7     public function insert(){
 8         $this->load->model('test_m');
 9         $arr = array('usid'=>1,'uname'=>'deng1','upass'=>'1234');
10         $this->test_m->user_insert($arr);
11     }
12
13     public function update(){
14         $this->load->model('test_m');
15         $arr = array('usid'=>22,'uname'=>'deng222','upass'=>'1233333');
16         $this->test_m->user_update(2,$arr);
17     }
18
19     public function delete(){
20         $this->load->model('test_m');
21         $this->test_m->user_delete(22);
22     }
23
24     public function select()
25     {
26         $this->load->model('test_m');
27         $arr = $this->test_m->user_select(1);
28         print_r($arr);
29         echo $arr[0]->usid;
30
31     }
32 }
33
34 /* End of file welcome.php */
35 /* Location: ./application/controllers/welcome.php */

 1 <?php
 2 /**
 3 *  ./application/models/test_m.php
 4 */
 5 class Test_m extends CI_Model
 6 {
 7
 8     function __construct()
 9     {
10         parent::__construct();
11         //connect to the database
12         $this->load->database();
13         //$this->load->insert($t_name,$data)
14     }
15
16     function user_insert($arr){
17         $this->db->insert('user',$arr);
18     }
19
20     function user_update($id,$arr)
21     {
22         $this->db->where('usid',$id);
23         $this->db->update('user',$arr);
24     }
25
26     function user_delete($id){
27         $this->db->where('usid',$id);
28         $this->db->delete('user');
29     }
30
31     function user_select($id){
32         $this->db->where('usid',$id);
33         $this->db->select('*');
34         $query = $this->db->get('user');
35         return  $query->result();
36     }
37 }
38 ?>

四.CI的文件上传demo

1.面向过程的文件上传方法

 1 #/controllers/upload.php
 2 <?php
 3 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 4
 5 class Upload extends CI_Controller {
 6
 7     //显示带表单的视图
 8     public function index(){
 9         $this->load->view('up');
10
11     }
12
13     //显示上传信息
14     public function up(){
15
16         if(!empty($_POST['sub'])){
17             //打印变量的函数
18             //var_dump($_FILES['upfile']);
19             $file = $_FILES['upfile'];
20             if($file['size'] >= 20000000){
21                 echo "size no!";
22             }
23             else{
24                 switch ($file['type']) {
25                     case 'image/jpeg':
26                         $br = '.jpg';
27                         break;
28
29                     default:
30                         $br = false;
31                         break;
32                 }
33
34                 if($br){
35                     $time = time();
36                     move_uploaded_file($file['tmp_name'], "./upload/$time$br");
37
38                 }
39                 else{
40                     echo "type no";
41                 }
42             }
43
44         }
45     }
46
47 }

1 #/views/up.php
2 <html>
3 <!--注意相对路径的建立-->
4     <form action="/CI/index.php/upload/up" method="post" enctype="multipart/form-data">
5         <input type="file" name="upfile" />
6         <input type="submit" name="sub" value="提交" />
7
8     </form>
9 </html>

2.面向对象的CI框架文件上传方法

a.定义一个数组，设置一些与上传相关的参数

//设置上传目录，这里写./,目录要建在网站根目录，就是和application同级

//如果你要放在application目录下，可以用系统定义的路径常量APPPATH

//例如：APPPATH.'uploads/'

$config['upload_path'] = './uploads/';

//设置允许上传的类型

$config['allowed_types'] = 'gif|jpg|png';

$config['max_size'] = '100';

//如果是图片还可以设置最大高度和宽度

$config['max_height'] = 768;

$config['max_width'] = 1024;

b.还可以设置其他的一些额外参数，详细看用户手册

c.调用CI的上传通用类，并执行上传

//upload为调用的类名，全小写

$this->load->library('upload',$config);

//如果上传框的name写的是userfile，那就不用传参数了，如果不是，把name的值传进去

$this->upload->do_upload('上传框的name');

d.接收出错信息或成功信息

//出错信息

$error = array('error' => $this->upload->display_error());

//成功信息

$data = array('upload_data' => $this->upload->data());

 1 <?php
 2 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 3
 4 class Upload extends CI_Controller {
 5
 6     //显示带表单的视图
 7     public function index(){
 8         $this->load->view('up');
 9
10     }
11
12     //显示上传信息
13     public function up(){
14
15         $config['upload_path'] = './uploads/';
16         $config['allowed_types'] = 'gif|jpg|png';
17         $config['max_size'] = "2000";
18
19         $this->load->library('upload',$config);
20
21         //打印成功或错误的信息
22         if($this->upload->do_upload('upfile'))
23         {
24             $data = array("upload_data" => $this->upload->data());
25             var_dump($data);
26         }
27         else
28         {
29             $error = array("error" => $this->upload->display_errors());
30             var_dump($error);
31         }
32     }
33
34 }

五.CI的登录验证demo

1.利用CI类实现session登录

a.修改配置文件（config.php）

$config['encryption_key']

b.加载SESSION类

$this->load->library('session');

c.创建SESSION

$this->session->set_userdata($array);

d.查看SESSION

$this->session->userdata(session名);

e.删除SESSION

$this->session->unset_userdata('SESSION名');

 1 ./application/controllers/login.php
 2 <?php
 3 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 4
 5 class Login extends CI_Controller {
 6
 7     public function index()
 8     {
 9         $this->load->view('login.html');
10     }
11
12     public function checklogin(){
13         $this->load->model("test_m");
14         $user = $this->test_m->user_select($_POST['uname']);
15         if($user){
16             if($user[0]->upass == $_POST['upass']){
17                 echo '密码正确！';
18                 $this->load->library('session');
19                 $arr = array("uid" => $user[0]->usid);
20                 $this->session->set_userdata($arr);
21                 echo "<br />";
22                 echo $this->session->userdata('uid');
23             }
24             else{
25                 echo '密码不正确！';
26             }
27         }
28         else{
29             echo '用户名不存在';
30         }
31     }
32
33     public function checksession(){
34         $this->load->library('session');
35         if($this->session->userdata('uid')){
36             echo '已经登录。';
37         }
38         else{
39             echo '没有登录。';
40         }
41     }
42
43     public function loginout(){
44         $this->load->library('session');
45         $this->session->unset_userdata('uid');
46     }
47 }

六.CI的分页功能demo

1.必须知道的一些参数

a.总共有多少条记录

b.一页要有多少条记录

c.总共多少页

d.当前页前后要显示多少个分页链接

2.设置一些CI分页类基本参数

//总条数

$config['total_rows']

//一页显示几条

$config['per_page']

//定义当前页的前后各有几个数字链接

$config['num_links']

//定义没有分页参数,主URL

$config['base_url']

3.调用CI的分页类

$this->load->library('pagination');

4.执行分页方法

$this->pagination->initialize($config);

5.输出分页链接

echo $this->pagination->create_links();

6.查询部分数据(limit)

echo $this->db->limit($num,$start);  //从$start查$num条

 1 ./applications/controllers/page.php
 2 <?php
 3 if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 4
 5 class Page extends CI_Controller {
 6
 7     public function user_add(){
 8         $this->load->model('test_m');
 9
10         for ($i = 1;$i <= 100;$i++){
11             $name = 'u'.$i;
12             $arr = array("usid"=>$i,"uname"=>$name,"upass"=>123456);
13             $this->test_m->user_insert($arr);
14
15         }
16     }
17
18     public function pagelist(){
19         $this->load->model('test_m');
20         $user = $this->test_m->user_select_all();
21         $allnum = count($user);
22         $pagenum = 20;
23
24         $config['total_rows'] = $allnum;
25         $config['per_page'] = $pagenum;
26         $config['num_links'] = 3;
27         $config['base_url'] = "/CI/index.php/page/pagelist";
28         $config['use_page_numbers'] = true;
29
30         $this->load->library('pagination');
31         $this->pagination->initialize($config);
32
33         var_dump($this->pagination->create_links());
34         echo $this->pagination->create_links();
35
36         echo "<br />";
37         $id = $this->uri->segment(3);  //获得url第三段字符
38         $id =$id ? $id:1;
39         $start = ($id - 1) * $pagenum;
40         $list = $this->test_m->user_select_limit($start,$pagenum);
41         var_dump($list);
42     }
43 }