Preface
The yiiwebController class is a commonly used class. Yii2’s front and back controllers all inherit this class. Regarding the description of the yiiwebController class, it is actually available in the Yii2 documentation. Why do I need to write this article? There may be many people wondering…. I think so. There is nothing wrong with the Yii2 documentation, but it is for the public after all, and there is no example in it. It is quite difficult for people to look at it. If someone can interpret each class and then release the specific Example, does it make you feel more comfortable just looking at it? Can you understand it faster?
Requirements analysis
Analyze the yiiwebController class and understand the methods and properties in its class and their usage.
Code analysis
Its inheritance order: `yiiwebController ? yiibaseController ? yiibaseComponent ? yiibaseObject
`
Interface implemented: yiibaseViewContextInterface
Its subclasses: yiirestActiveController, yiirestController
Take the WeelySummaryController controller as an example for testing , the following is the result I got from calling the more commonly used methods or attributes of its parent class, now I share it with you:
1. $this->id //Get the name string of the controller (controller id)
such as :weely-summary
2, $this->getViewPath() or $this->viewPath
//Get the current view path, specific to the folder name.
For example: D:phpStudyWWWhandbackendviewsweely-summary
3, $this->action->id //Get the current view name
For example: index //List page
4, $this->action-> ;actionMethod //Get the current method name
such as: actionIndex
5, $this->actionParams //Bind the parameters of the current operation
such as: Array ( [id] => 3 )
6, $this- >route //Get the route of the current request and get the controller id and view id
For example: weely-summary/index
Related information
Yii2 documentation: http://www.yiichina.com/doc/api/ 2.0/yii-web-controller
The above has introduced the analysis of the yiiwebController class, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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