CodeIgniter Study Notes (i)--ci Introduction and MVC design pattern

Advantages of CodeIgniter:

1. Lightweight framework
2. Excellent performance
3. Wide range of compatible PHP versions and configurations on standard hosts
4. 0 configuration
5. You do not need to use the command line
6. No need to stick to restrictive coding rules

CodeIgniter Latest version of: http://www.codeigniter.org.cn/

After downloading the compressed package, unzip it with the following content:

• Application directory: A directory of programs that contains models, views, and controllers directories that implement the MVC pattern
• System directory: CodeIgniter framework code, cannot be modified, otherwise cannot be replaced after upgrade
• User_guide Directory: User manual, English version of
• index.php File: Portal file
• License.txt file: Copyright license file

Review the implementation of the MVC pattern and create a portal file index.php

<?PHPHeader("Content-type:text/html;charset=utf-8"); //Get controller name    $c=$_get[' C ']; //contains the file where the controller resides    include'./controllers/'.$c.‘ Controller.php '; //instantiating a controller    $className=$c. ' Controller '; $controller=New $className(); //Get method Name    $a=$_get[' A ']; //Calling Methods    $controller-$a();?>

Then create the data model file usermodel.php file, placed in the models directory

<?PHPclassUsermodel { Public functiongetAllUsers () {$list=Array(                    Array(' id ' =>1, ' name ' = ' Jack ', ' email ' = ' [email protected] '),Array(' id ' =>2, ' name ' = ' Mary ', ' email ' = ' [email protected] '),Array(' id ' =>3, ' name ' = ' Lili ', ' email ' = ' [email protected] '),                ); return $list; }    }?>

Then create the controller file usercontroller.php file, placed in the Controllers directory

<?PHPclassUsercontroller { Public functionindex () {//call the model method to get the data            include'./models/usermodel.php '; $model=NewUsermodel (); $list=$model-getAllUsers (); //include view file            include'./views/user/index.php '; }    }?>

Finally create the view file index.php file, placed in the views directory, here only simple display array

<! DOCTYPE html>    This is the view    of the user controller's index method <  PHP        echo "<br/>";         Var_dump ($list);    ? ></body>
Incoming controller name and method name via URL: http://localhost:8080/testCodeIgniter/mvc/index.php?c=user&a=index
The display results are as follows:
MVC Summary:

 
 

  
  
 
   
The portal file is the only script that lets the browser request
 
   
The controller is responsible for reconciling the model and view
 
   
The model is only responsible for processing data
 
   
View is only responsible for displaying data
 
  
 
 
CodeIgniter Study Notes (i)--ci Introduction and MVC design pattern