What to learn in php

Things to learn in php: 1. Basic syntax, which can help developers write code that is highly readable and easy to maintain; 2. Database operations, most web applications need to interact with the database, store Get data; 3. Form processing, master how to verify and filter user input, process form data and prevent malicious code injection; 4. File processing, operate files, read file contents and write files; 5. Image processing, develop interesting Function; 6. Security, ensuring the security of applications; 7. Frameworks and libraries, which can greatly improve development efficiency, etc.

The operating system of this tutorial: Windows10 system, PHP version 8.1.3, DELL G3 computer.

PHP is a very popular server-side scripting language that is widely used to develop web applications. Learning PHP can help people master the skills of dynamic web development and help build powerful and interactive websites. Here are some important things to know when learning PHP.

1. Basic syntax: The first step in learning PHP is to master basic syntax, including variables, data types, operators, loops, conditional statements, etc. Understanding the basic syntax of PHP can help developers write code that is highly readable and easy to maintain.

2. Database operation: Most web applications need to interact with the database and access data. Learning how to connect, query, insert, update, and delete data using PHP is crucial. The common database operating language is SQL. Understanding basic SQL statements can better use PHP to interact with the database.

3. Form processing: Web applications usually involve interaction with users, such as user registration, login, form submission, etc. Learning how to handle form input using PHP is essential. Knowing how to validate and filter user input, process form data, and prevent malicious code injection is key to developing secure and reliable applications.

4. File processing: Learning the file processing function of PHP allows developers to operate files, read file contents, write files, etc. in applications. This is very useful for scenarios such as processing user-uploaded files, generating log files, reading configuration files, etc.

5. Image processing: Understanding how to use PHP to process images allows developers to implement some interesting functions, such as generating thumbnails, cropping images, image filters, etc. This is very helpful for developing photo sharing, social media, e-commerce and other websites.

6. Security: It is very important to learn how to secure your web applications. Understanding common security vulnerabilities, such as cross-site scripting (XSS), cross-site request forgery (CSRF), etc., and learning how to use PHP to prevent these attacks can ensure the security of your application.

7. Frameworks and libraries: Learning to use PHP frameworks and libraries can greatly improve development efficiency. Popular PHP frameworks include Laravel, Symfony, etc., which provide some common functions and tools for developing web applications. In addition, PHP has many excellent third-party libraries, such as database operation library PDO, image processing library GD, etc. Learning and using these frameworks and libraries can greatly simplify the development process and improve the readability and maintainability of your code.

In summary, learning PHP requires mastering knowledge of basic syntax, database operations, form processing, file processing, image processing, security, etc. In addition, understanding and using PHP's frameworks and libraries can greatly improve development efficiency. Through continuous practice and learning, developers can build powerful, secure and reliable web applications.

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