ThinkPHP is a widely used PHP open source framework. It is simple to use, efficient and flexible. It is called the "Chinese version of laravel" by many people. For developers who are learning the ThinkPHP framework, reading the source code can allow you to better learn framework design concepts and various PHP techniques. So, how to read the ThinkPHP source code? Here are some suggestions.
Step One: Preparation
Before you start reading the ThinkPHP source code, you must first prepare the following tools:
- IDE: such as PhpStorm or Visual Studio Code wait.
- Git: It is recommended to use Git command line and Git GUI tools.
Step 2: Obtain the source code
There are two ways to obtain the ThinkPHP source code:
1. Download from the official website
Download from the ThinkPHP official website Link path, download the source code zip file, and then unzip it to your project directory.
2. Use Git to clone
Use Git to clone the ThinkPHP repository so that you will get the latest code.
git clone https://github.com/top-think/framework.git
Step Three: Read the Source Code
After having the source code, we start to get to the point-how to read the source code.
1. Understand the directory structure of ThinkPHP
To read the ThinkPHP source code, you first need to understand its overall directory structure. The directory structure of ThinkPHP is as follows:
- application: application directory
- think: core framework directory
- extend: third-party extension directory
- vendor :Composer class library directory
- public:Entry and resource management directory
2. Read the core code
The core code of ThinkPHP is located in the think directory.
To understand the core code of the ThinkPHP framework, you can start with the following files:
- think\facade.php: Facade class, which encapsulates most of the convenient methods and facade design pattern , simplifying the difficulty of use.
- think\App.php: Application class, using PSR-4 to load classes, basically controls the entire framework, and encapsulates the application process into the prototype of the framework.
- think\route\Dispatch.php: Routing scheduler, which handles different routing modes differently, is one of the core.
- think\Db\Connection.php: Data connection class, manages database connections.
- think\Db\Query.php: Database query class, which encapsulates data operation methods.
- think\Error.php: Error handling class, managing error reports, is a powerful tool for debugging code.
By reading these codes, you can have a more comprehensive understanding of the entire life cycle of the application.
3. Read the application code
After understanding the ThinkPHP directory structure and core code, we need to read the application code. The application code is encapsulated based on the core code of ThinkPHP, with some common operations and custom logic defined according to project requirements. In applications, the directories often involved include:
- application\index: module directory
- application\index\model: model directory
- application\index \controller: Controller directory
- application\index\view:View directory
The controller is the central part of the entire application, responsible for accepting user requests and calling related methods to make appropriate response. The model layer is mainly responsible for obtaining data from the database, operating on the data, and finally passing it to the view layer. The view is responsible for organizing the data and displaying it to the front end.
Step 4: Debugging the source code
In the process of reading the source code, you will encounter many problems and questions. At this time, debugging will be a very necessary link. Before reading the source code, you can first understand the common mistakes made by novices to better avoid these problems.
Debugging tools:
- XDebug: One of the commonly used PHP debugging tools, which can be used for breakpoint debugging and remote PHP debugging.
- PsySH: An interactive PHP interpreter that can debug PHP code from the command line.
- Performance analysis tools: such as Blackfire and XHProf, etc.
Conclusion
Reading code is one of the important ways to improve development skills. It can help us optimize code, improve code quality and avoid unnecessary errors. I hope that through the above introduction, readers can better understand the source code structure of ThinkPHP and how to debug the code, so as to better develop.
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