CI Framework Common classic operation class Summary (routing, pseudo-static, paging, session, Verification Code, etc.), ci

CI Framework Common classic operation class Summary (routing, pseudo-static, paging, session, Verification Code, etc.), ci

This example summarizes the common classic operation classes of the CI framework. We will share this with you for your reference. The details are as follows:

1. URI in the super object

Information about the resolution url of the CI_URI class

You can directly use $ this-> uri to use its related attributes.

System/core/URI. php file

Some common attributes:

(1) Obtain url-related information in Segments

$ This-> uri-> segment (4); // obtain the value of the fourth segment of pathinfo // in the url

Entry file. php/controller/Action/parameter 1/parameter 2 /...

(2) passing parameters through the form parameters in the Method

Pay attention to the default value and sequence.

Index. php/user/index/3/zhangsan

public function index($id=0,$name=''){  echo $id,$name;}

2. Expansion of CI Controller

Under the application/core/folder

Add your own extended Controller

class MY_Controller extends CI_Controller{  public function __construct(){   parent::__construct  }}

Configure model prefix

$ Config ['subclass _ prefix'] = 'my _ '; // Default Value

3. Model-related operations

All file names are in lowercase, and the first letter of the class name is in uppercase.

Suggested class name with _ model suffix

Load the model in the controller:

Add the following to construct:

$this->load->model('User_model');$this->User_model->get();

Alias for Model

$this->load->model('User_model','user');$this->user->get();

4. Common functions in URLs

(1) Help us generate Controllers

$ This-> load-> helper ('url'); site_url ('controller/method ');

(2) image path usage

$this->load->helper('url');

upload/a.jpg" />

You can configure automatic loading in autoload. php.

$ Autoload ['helper '] add url

5. Routing and pseudo-static in CI

(1) pseudo-static Routing

$router['show/([\d]+)\.html']='article/show/$1';article/show/5.html => article/show/5;

(2) Hide the entry file

# Enable the rewrite module of apache # Put the. htaccess file in the root directory to rewrite RewriteEngine onRewriteCond % {REQUEST_FILENAME }! -DRewriteCond % {REQUEST_FILENAME }! -FRewriteRule ^ (. *) $ index. php/$1 [QSA, PT, L]

6. Paging in CI

// Operate in the model // load the paging class file $ this-> load-> library ('pagination'); $ this-> load-> helper (url ); // pagination link $ config ['base _ url'] = site_url ('user/test'); // The total number of records $ config ['total _ rows '] = 100; // 10 pieces of data are displayed on each page. $ config ['per _ page'] = 10; // offset $ offset_limit = intval ($ this-> uri-> segment (3); $ this-> pagination-> initialize ($ config ); echo $ this-> pagination-> create_links ();

Button customization in the page (note that it is configured before initialization)

$ Config ['first _ link'] = 'homepage ';... $ config ['uri _ segment'] = 3; // The offset of querying paging data

Which segment of the url corresponds to the above $ offset

The default value is 3. Otherwise, the corresponding value needs to be modified.

7. Use of sessions in CI

// Load the session library $ this-> load-> library ('session ');

(1) obtain the system session

// For example, obtain the Client ip address $ this-> session-> userdata ('IP _ address ');

(2) Add a custom session

// Add $ this-> session-> set_userdata ('some _ name', 'some _ value '); // get $ this-> session-> userdata ('some _ name'); // Delete $ this-> session-> unset_userdata ('some _ name ');

(3) flashing data (invalid once retrieved)

// Add $ this-> session-> set_flashdata ('item', 'value'); // obtain $ this-> session-> flashdata ('item ');

In the login data, the url of the page before logon can be recorded,

Note: One-time data is automatically destroyed once read.

To ensure security, add the random encryption string generated in config. php

$config['encryption_key']="fjkdsffjkhjd#kjh";

Whether to encrypt cookies

$config['sess_encrypt_cookie'] =TRUE;

8. File Upload in CI

<form action="<?php echo site_url('user/upload');?>" enctype="multipart/form-data"> <input type="file" name="pic"/> <input type="submit" value="submit"></form>

Upload processing:

$config['upload_path']="./upload";$config['allowed_types']='gif|jpeg|jpg';$this->load->library('upload',$config);$this->upload->do_upload('pic');

File Upload data

$filedata = $this->upload->data();

9. The verification code in CI

// Generate the verification code $ this-> load-> helper ('captcha '); $ this-> load-> helper ('url '); $ vals = array ('word' => rand (1000,9999), 'img _ path' => '. /captcha/', 'img _ url' => base_url (). '/captcha/''img _ width' => '000000', 'img _ height' => '000000', 'expiration' => 150 ); $ cap = create_captcha ($ vals); echo $ cap ['image']; // put the number obtained by the Verification code in the session session_start (); $ _ SESSION ['Cap '] = $ cap ['word'];