Should PHP function naming follow CAMEL CASE or snake_case?

PHP function naming has two styles: CAMEL CASE uses camel case naming for class methods, which is more compact and easier to read; snake_case uses underscore connectives for functions and global variables, which is clearer and more consistent with convention. Choosing a specification depends on personal preference and team agreement. Being consistent improves code readability and maintainability.

PHP function naming convention: CAMEL CASE and snake_case

In PHP, function naming follows two main styles: CAMEL CASE and snake_case. CAMEL CASE uses camelCase nomenclature, while snake_case uses underscore connectives.

CAMEL CASE

<?php
function getUserName() {
    // 返回用户姓名
}

This style is more common in class methods because it is more compact and easier to read.

snake_case

<?php
function get_user_name() {
    // 返回用户姓名
}

This style is typically used for functions and global variables because it is clearer and more consistent with the conventions of most programming languages.

Practical case

Suppose there is a file system tool class that provides a series of functions for operating files:

<?php

namespace FileSystem;

class FileUtils {

    // 使用 snake_case 命名，用于全局命名空间
    function get_file_size($filename) {
        // 返回文件大小
    }

    // 使用 CAMEL CASE 命名，用于类方法
    function calculateFileSize($filename) {
        // 返回文件大小，使用更高级算法
    }

}

In this case, the global Function get_file_size() uses snake_case as it is part of the overall file system toolkit. And the class method calculateFileSize() takes CAMEL CASE because it is only used in the FileUtils class.

Selection Specification

Ultimately, which style to choose depends on personal preference and team agreement. It is recommended to be consistent throughout the project to ensure the code is easy to read and maintain.

The above is the detailed content of Should PHP function naming follow CAMEL CASE or snake_case?. For more information, please follow other related articles on the PHP Chinese website!