Interpret and apply naming rules in PHP code specifications

Interpret and apply the naming rules in PHP code specifications

Overview:

When writing PHP code, good naming conventions are crucial of. Good naming conventions can make the code easier to read and understand, and improve the maintainability and reusability of the code. This article will interpret and apply the naming rules in the PHP code specification and provide some practical code examples.

1. Variable names:

Variable names should have the following characteristics:

• Use meaningful names: Variable names should reflect the purpose of the variable and meaning, the naming should be clear and easy to understand.
• Use lowercase letters: Variable names should use lowercase letters, not uppercase letters.
• Use underscores to separate words: If the variable name consists of multiple words, underscores (_) should be used to separate them, for example: $user_name.
• Avoid using abbreviations: When naming variables, try to avoid using ambiguous abbreviations.

The following is an example of a well-named variable:

$user_name = "John Doe";

2. Constant name:

Constant name should have the following characteristics:

• Use uppercase letters: Constant names should use uppercase letters.
• Use underscores to separate words: If the constant name consists of multiple words, underscores (_) should be used to separate them, for example: MAX_SIZE.
• Avoid using abbreviations: When naming constants, try to avoid using ambiguous abbreviations.

The following is an example of a well-named constant:

define("MAX_SIZE", 100);

3. Function name:

The function name should have the following characteristics:

• Use lowercase letters: Function names should use lowercase letters, not uppercase letters.
• Use underscores to separate words: If the function name consists of multiple words, underscores (_) should be used to separate them, for example: get_user_name.
• Use verb as prefix: The function name should start with a verb to indicate that the function will perform some action.

The following is an example of a well-named function:

function get_user_name($user_id) { // 获取用户姓名的逻辑代码 }

4. Class name:

The class name should have the following characteristics:

• Use camelCase nomenclature: Class names should use camelCase nomenclature, the first letter of each word should be capitalized, and underscores should not be used.
• Use descriptive names: Class names should have descriptive names so that other developers can easily understand and use the class.

The following is an example of a well-named class:

class UserManager { // 类的属性和方法 }

5. File name:

The file name should have the following characteristics:

• Use lowercase letters: File names should use lowercase letters, not uppercase letters.
• Use underscores to separate words: If the file name consists of multiple words, underscores (_) should be used to separate them, for example: user_manager.php.

The following is an example of a well-named file name:

user_manager.php

Summary:

By following good naming conventions, we can write files that are easier to read and understand. PHP code. Variable names, constant names, function names, class names, and file names should follow corresponding rules. Through a unified naming style, the maintainability and reusability of the code can be improved, and the possibility of errors and conflicts can be reduced.

Reference materials:

• PSR-1: Basic Coding Standard: https://www.php-fig.org/psr/psr-1/
• PSR-12: Extended Coding Style: https://www.php-fig.org/psr/psr-12/

The above is the detailed content of Interpret and apply naming rules in PHP code specifications. For more information, please follow other related articles on the PHP Chinese website!