How to write comments in php? Tips sharing

PHP is a widely used server-side scripting language that can be used to create dynamic web pages and web applications. Comments are a very important skill when writing code. Comments can make code easier to understand and maintain, and can help other developers understand the logic of your code. In this article, we'll explore best practices and tips for writing comments in PHP.

The role and type of comments

A comment is a text used to describe or explain the code. It can have two types: single-line comments and multi-line comments.

Single-line comments usually appear at the end of a line of code, starting with "//". For example:

//这是单行注释

Multi-line comments are used to comment complex code blocks or entire files, starting with "/" and ending with "/". For example:

/*
这是多行注释
用于注释一段复杂的代码或整个文件
*/

Comments can help other developers understand your code, including code logic and intent. When writing code, comments can also help you deal with errors in your code.

Best Practices and Tips for Comments

1. When writing PHP code, comments should be as detailed as possible. Comments should explain the intent of the code, not just describe what the code does.
2. Comments should be in understandable and simple language so that other developers can easily understand the code.
3. Comments should be written in order from top to bottom so that developers can read the comments in order when reading the code.
4. Avoid using complex words or professional terms as comments to avoid making it difficult for others to understand.
5. Comments should group code blocks as necessary. For example, when writing a longer file, you can use comments to group different functions or methods.
6. Supplementary comments should provide information about the types of variables and functions in the code, parameter lists and return types.
7. When sending code, if another person is going to make modifications or additions to the code, record important details or features in comments so they can follow that direction and ensure it doesn't break the functionality of the code.

Best Practice Example

The following is an example way to comment, which can be a good guide for you to write better comments.

<?php

/**
* function_name - 简明地描述函数的用途
*
* @param $param1 - 描述函数参数的 purpose
* @param $param2 - 描述函数参数的 purpose
* @return  - 描述函数返回结果的 purpose
*/
function function_name($param1, $param2) {

// 这是一个会执行的代码块
$var1 = $param1 + $param2;

}

?>

Summary

Comments are a very important technique when writing code in PHP. It helps other developers better understand your code, as well as providing better maintainability for yourself. When writing comments, try to follow best practices, use understandable and simple language, and provide as much detail as possible.

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