Getting Started with PHP: Code Refactoring
May 26, 2023 pm 04:21 PM
When writing PHP code, refactoring is a very important process. As an application grows, the code base becomes larger and harder to read and maintain. Refactoring is to solve this problem and make the code more modular and better organized and extensible.
When we refactor the code, we need to consider the following aspects:
- Coding style
Coding style is a very important point. Keeping your coding style consistent will make your code easier to read and maintain. Please follow PHP coding standards and be consistent. Try using a code style checking tool, such as PHP_CodeSniffer or PHPMD, to check whether your code complies with standards before it is submitted.
- Readability
Code should be readable and easy to understand. Remember, code is not written just for machines, it should be readable by human programmers as well. Use meaningful variable names and comments, clear and understandable function names, and pay attention to details such as code indentation.
- The length of the function
Long functions can easily make the code difficult to understand and maintain. Try to have each function do only one thing, and keep it short and easy to understand. If the function is too long, consider splitting it into smaller functions.
- Parameters of function
The parameters of function should be as few as possible. It's best to avoid using too many parameters as they can make the code complex and difficult to test. Consider passing an object or array instead of a large number of parameters.
- Use constants
Values ??that can be used multiple times in an application, such as database names and directory paths, are best defined as constants. This maintains consistency and makes the code more readable.
- Error handling
Error handling is essential in the code, but too many error handling statements will make the code difficult to understand. Consider using custom exceptions to replace regular error handling, and then using try-catch statements at the entry point of your application to catch these exceptions.
- Static Code Analysis
Using PHP static code analysis tools such as PHPStan or Psalm can be helpful in checking your code for errors and warnings. These tools can check for code style, type checking and code logic errors and prompt you through the IDE or command line.
- Code Reuse
Code reuse is very important to reduce code duplication and better organize code. Try encapsulating similar code into common functions, or putting reusable code into separate classes for reuse across your application.
In PHP, refactoring code is an eternal process. By continually building better code, we can achieve better abstraction, organization, and a better understanding of our applications. With this as a foundation, we can more easily extend functionality and maintain and update the code base.
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