How to Write Documentation for PHP Functions? Detailed Guide

How to Write Documentation for PHP Functions

In PHP development, writing documentation for functions is a good practice. It not only helps team members better understand the code but also improves code maintainability. PHP uses the '@' symbol to add documentation comments to functions, and the following is the common documentation format:

PHP Function Documentation Format

In PHP, function documentation is written in a standard comment block format using the '@' symbol followed by relevant descriptive keywords to help developers quickly understand the function's purpose.

/**

* @param Type $param1 Description for parameter 1

* @param Type $param2 Description for parameter 2

* @return Type Description for return value

*/

function

{

}

Real-world Example: Adding Two Numbers

The following is a practical example showing how to document a PHP function that calculates the sum of two numbers:

/**

* Adds two numbers.

*

* @param number $num1 First number

* @param number $num2 Second number

* @return number Sum of the two numbers

*/

function

{

}

Common PHP Magic Annotations

In PHP, there are some commonly used magic annotations that describe various properties of a function:

• @param: Describes the function's input parameters.
• @return: Describes the function's return value.
• @throws: Describes any exceptions that the function might throw.
• @since: Indicates the PHP version in which the function was introduced or modified.
• @deprecated: Marks a function as deprecated and no longer recommended for use.

Summary

By using proper documentation comments, PHP code can become more readable, especially when working in a team environment. Using annotations like @param, @return, etc., correctly can help developers quickly understand the purpose of a function.