CI framework commonly used classic Operation class summary (routing, pseudo Static, paging, session, verification code, etc.) _php instance

In this paper, we summarize the common classical operation of CI framework. Share to everyone for your reference, specific as follows:

1. URIs in Super objects

Information about the resolution URL of the Ci_uri class

Use $this->uri directly to use its related properties

In the system/core/uri.php file

Some Common properties:

(1) Segment Get URL related information

$this->uri->segment (4);
Gets the
value of the fourth segment of PathInfo//in the URL

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

(2) by means of the formal parameters of the parameter

Need to set default values and order to note

Index.php/user/index/3/zhangsan

Public Function Index ($id =0, $name = ') {
  echo $id, $name;
}

Extension of the 2.CI controller

Under the Application/core/folder

To add your own extension controller

Class My_controller extends ci_controller{public
  function __construct () {
   parent::__construct
  }
}

Configure model Prefix

$config [' Subclass_prefix ']= ' my_ ';//Default value

3. Related operation of the model

File name all lowercase, class name first letter uppercase

Suggested class name plus _model suffix

To load the model in the controller:

Add in construct:

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

Alias a model

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

Common functions in 4.url

(1) Help us build the controller

$this->load->helper (' url ');
Site_url (' controller/method ');

(2) The use of the image path

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

upload/a.jpg "/>

Automatic loading can be configured in autoload.php

$autoload [' helper '] add URL

5. Routing and pseudo-static in CI

(1) Routing pseudo static

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

(2) Hide the entry file

overridden by #开启apache的rewrite模块 #在根目录中放入. htaccess file
rewriteengine on
rewritecond%{request_filename}!-d
Rewritecond%{request_filename}!-f
Rewriterule ^ (. *) $ index.php/$1 [qsa,pt,l]

6. Pagination in CI

The model operates
//loads the paging class file
$this->load->library (' pagination ');
$this->load->helper (URL);
Page links
$config [' base_url '] = Site_url (' user/test ');
Total number of records
$config [' total_rows '] = m;
Each page displays 10 data
$config [' per_page '] = ten;
Offset
$offset _limit = intval ($this->uri->segment (3));
$this->pagination->initialize ($config);
echo $this->pagination->create_links ();

Customization of buttons on pagination (note that configuration is done before initialization)

$config [' first_link '] = ' home ';
...
$config [' uri_segment '] =3;//paging data query offset

In which paragraph of the URL corresponds to the $offset above

The default is 3, otherwise you need to modify the corresponding value

7. Use of the session in CI

Load Session Library
$this->load->library (' Session ');

(1) Get system session

For example, to obtain the IP address of the client
$this->session->userdata (' ip_address ');

(2) Add 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) Flash out the data (after one time out of the expiration)

Add
$this->session->set_flashdata (' Item ', ' value ');
Get
$this->session->flashdata (' item ');

The URL of the page in the login data to return to the login can be recorded.

Note: One-time data, once read, will be automatically destroyed.

To ensure security, add in the config.php generated randomly encrypted string

$config [' Encryption_key ']= "FJKDSFFJKHJD#KJH";

Do you want to encrypt the cookie

$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 ');

Data uploaded by file

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

9. Authentication code in CI

Generate 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 ' => ', '
  img_height ' => ', ' Expiration ' =>7200
);
$cap = Create_captcha ($vals);
echo $cap [' image '];
The number obtained by the verification code is placed in the session
Session_Start ();
$_session[' cap ' = $cap [' word '];

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