Why should PHP function documentation follow writing conventions?

PHP function documentation writing specifications are crucial. The specifications mainly involve modular segmentation, clear and concise language, detailed parameter descriptions, clear return value information, and providing code examples. Standardized documentation improves consistency and readability, which reduces development costs and improves code quality.

The importance of PHP function documentation writing standards

Introduction
High-quality function documentation It is crucial for developers to use function libraries efficiently. Following writing conventions for PHP function documentation can improve the consistency and readability of the documentation, thereby reducing developers' learning costs and improving code quality.

Writing specifications

PHP function document specifications mainly include the following aspects:

• Modularization: Organize the document into independent modules, such as function signatures, parameters, return values, and examples.
• Clear and concise: Use clear and concise language to describe functions, avoiding the use of technical terms or jargon.
• Parameter description: Provide the data type, range and expected value of the parameter.
• Return value description: Indicate the function's return value type and format, as well as any potential errors or exceptions.
• Examples: Contains code examples that show how to use functions and handle exceptions.

Practical case

The following is an example of a function document written in compliance with PHP function documentation specifications:

/**
 * 计算两个数字的和
 *
 * @param int $a 第一个数字
 * @param int $b 第二个数字
 * @return int 两个数字的和
 * @throws TypeError 如果 $a 或 $b 不是整数
 */
function sum(int $a, int $b): int
{
    // 检查输入类型
    if (!is_int($a) || !is_int($b)) {
        throw new TypeError('Invalid input: expected integers');
    }

    // 计算和并返回
    return $a + $b;
}

This document complies with the following specifications:

• Modularization: Organize documentation into function signatures, parameters, return values, and examples.
• Clear and concise: Use clear and concise language to describe functions.
• Parameter description: Provide the data type and expected value of the parameter.
• Return value description: Indicate the function's return value type and any potential errors.
• Example: Contains a code example showing how to use the function and handle exceptions.

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