Best Practices for PHP Functions: Naming Conventions and Documentation?

PHP function best practices include naming conventions and documentation. Naming conventions follow lowercase letters and underscores, start with a verb, and be descriptive. PHPDoc annotations are used in documentation, including @param (parameters), @return (return value), and @throws (exception) annotations. These practices improve consistency, readability, maintainability, and code completion.

Best Practices for PHP Functions: Naming Conventions and Documentation

Naming Conventions

• Use lowercase letters and underscores: my_function
• ##Verb beginning: create_user
• Descriptive: calculate_shipping_cost
• Avoid abbreviations: Use user_id instead of uid

Documentation

PHPDoc Comments

• Summary: With the @ symbol Begins, followed by the function name
• Parameters: Starts with @param, followed by parameter type and description
• Return value: Starts with @return, followed by Return value type and description
• Exception:Start with @throws, followed by the exception type and description that may be thrown

Example:

/**
 * 计算商品的总重量
 *
 * @param array $items 商品列表（包含重量信息）
 * @return float 总重量（单位：千克）
 * @throws InvalidArgumentException 如果商品列表为空
 */
function calculate_total_weight(array $items): float
{
    // ...代码...
}

Practical case

User registration function

/**
 * 注册新用户
 *
 * @param string $username 用户名
 * @param string $password 密码
 * @param string $email 邮箱
 * @return int 新创建用户的 ID
 * @throws InvalidArgumentException 如果输入无效
 */
function register_user(string $username, string $password, string $email): int
{
    // ...代码...
}

Usage method:

$user_id = register_user('john', 'password', 'john@example.com');

Advantages

• Consistency and readability: The naming convention ensures that functions are named consistently, making them easier to read and understand.
• Better code maintainability: Documentation provides information on the function and usage of the function, making it easy to maintain and debug.
• Code completion: Modern IDEs and code editors automatically complete function names and parameters in PHPDoc, simplifying the coding process.

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