What are the naming conventions for PHP functions?

PHP function naming convention is as follows: use lowercase letters and underscores to separate words. Begin with a verb that expresses an action. Choose a name that is clear and precise. Avoid abbreviations. Reflect the role of parameters to understand the role of the function.

Naming convention for PHP functions

In PHP, the function naming convention is a set of rules that guide how to choose the right names for functions. Meaningful, consistent and easy-to-understand names. Following these conventions is critical to improving code readability, consistency, and maintainability.

Naming Convention

• Use lowercase letters and underscores: Use all lowercase letters and an underscore (_) to separate words.
• Start with verb: The function name should start with a verb that represents the function operation.
• Clear meaning: Choose a name that clearly and accurately describes the purpose of the function.
• Avoid abbreviations: Try to avoid abbreviations as they may be difficult to understand.
• Match parameters: Function names should reflect their parameters so developers can easily understand what the function does.

Case:

• function get_user_name() Get the user's name.
• function update_product_price() Update the price of the product.
• function calculate_shipping_cost(int $weight, string $destination) Calculate shipping cost.

Practical case

Example 1:

// 命名不佳
function fn1($param1, $param2) {}

// 命名良好
function get_user_by_id(int $id) {}

Example 2:

// 使用缩写
function regUser(string $username, string $password) {}

// 不使用缩写
function register_user(string $username, string $password) {}

Naming conventions to avoid

• Use uppercase letters: Do not use uppercase letters as this will make the name difficult to read.
• Abuse of special characters: Avoid using special characters (such as !, $) as they may cause confusion.
• Vague meaning: Do not use vague or ambiguous names.
• Long or hard-to-spell names: Choose names that are short, easy to remember, and easy to spell.

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