A brief introduction to Symfony core classes

This article mainly introduces the core classes of Symfony, and briefly analyzes the core classes, organizational structure and corresponding functions of Symfony. Friends in need can refer to it. I hope it will be helpful to everyone.

The details are as follows:

Symfony’s core classes

Symfony’s MVC method uses some classes that you will often encounter in the future

1. sfController is the controller, it decodes the request and delivers it to the action

2. sfRequest stores all request elements (parameters, cookies, header information, etc.)

3. sfResponse contains response header information and content, which are ultimately converted to HTML and sent to the user

4. A context (obtained through sfContext::getInstance()) saves all core objects Reference and existing configuration information can be accessed from any location.

As you can see, all symfony classes use the sf prefix. This avoids conflicts with your own classes or variables and makes core framework classes easier to identify.

Organization of code

You already know the different components of a symfony application, but you may not know how it is organized.

Project structure: applications, modules and actions

In symfony, a project is a set of services and operations under a specified domain name, and they share an object model.

A project is composed of multiple applications. An application is composed of multiple modules. A module can contain multiple actions.

Project structure diagram:

#Symfony’s root tree structure and description

##Config/Data/Doc/

apps/	Contains items Application, one application corresponds to a folder
Batch/	contains PHPcode executed or scheduled from the command line
##Cache/	Cache folder, requires 777 permission
	Save the basic configuration of the project
	Save the project Data files, such as database structures, SQL files that create data tables, or SQLite database files, etc.
	Store project documents, including your own documents and documents generated by PHPDoc
Lib/	Data Model
Log/	Log folder, requires 777 permission
Plugins/	Stores the plug-ins installed in the application
Test/	half-heated unit and common testing
##Web/	WEB Root of service

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