Naming conventions in PHP: How to name constants and file names using underscore nomenclature

Naming conventions in PHP: How to use underscore nomenclature to name constants and file names

In PHP programming, good naming conventions are very important to improve the readability and maintainability of the code. This article will introduce how to use underscore nomenclature to name constants and file names, and demonstrate it with code examples.

1. Naming convention for constants

In PHP, constants are usually named in all uppercase letters, with words separated by underscores. This naming convention clearly distinguishes constants from variables and is easy to read and understand.

The following are some common constant naming examples:

define('MAX_SIZE', 1024); // 定义一个最大尺寸常量
define('DB_NAME', 'my_database'); // 定义一个数据库名称常量
define('DEFAULT_COLOR', 'red'); // 定义一个默认颜色常量

2. Naming convention for file names

In PHP, file names are usually all lowercase and Separate words with underscores. This naming convention can improve the readability of files and make them more compatible in cross-platform development.

The following are some file name naming examples:

user_profile.php // 用户个人资料页面
database_helper.php // 数据库辅助函数文件
config.php // 配置文件

3. Naming examples

Below we use a simple example to demonstrate how to use the underscore naming method. Named constants and filenames.

Suppose we are developing a simple login system and need to define some user-related constants and file names.

First, we define some user-related constants:

define('USER_TABLE', 'users'); // 用户表名常量
define('USER_STATUS_ACTIVE', 1); // 用户状态-活跃常量
define('USER_STATUS_INACTIVE', 0); // 用户状态-不活跃常量

Then, we create some user-related files:

user_login.php // 用户登录页面
user_registration.php // 用户注册页面
user_controller.php // 用户控制器
user_model.php // 用户模型

By using underscore nomenclature, we can Clearly distinguish between different constants and files, making them easier to understand and maintain.

Summary:

Good naming conventions are very important for writing code that is easy to read and maintain. In PHP, it is a common practice to use underscore nomenclature in naming constants and filenames. By clearly distinguishing words and using underscores to separate them, we can make our code more readable and make it easier to collaborate with other developers.

I hope this article will help you understand how to use underscore nomenclature to name constants and file names in PHP. Remember, good naming conventions are one of the keys to writing high-quality code.

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