Naming conventions and rules for PHP functions

PHP, as a very popular scripting language, has powerful function library support. Its function naming conventions and rules have an important impact on development efficiency and code readability. This article will introduce the naming conventions and rules of PHP functions.

1. Naming style

In PHP, function names need to strictly comply with naming specifications and rules. The specifications mainly include two aspects: naming style and naming rules.

1. Underscore naming method

Underscore naming method is the most commonly used way to name PHP functions, and it is also an officially recommended way. Function names following this approach consist entirely of lowercase letters, with underscores connecting words. For example, get_user_name(), get_user_info().

2. Camel case nomenclature

Camel case nomenclature is also a commonly used method, which includes small camel case nomenclature and big camel case nomenclature. CamelCase nomenclature consists of the first word being all lowercase and the first letter of subsequent words being capitalized. For example, getUserInfo(), getUserName(). The big camel case naming rule capitalizes the first letter of all words, such as GetUserInfo(), GetUserName().

2. Naming rules

In PHP, function names not only need to conform to the naming style, but also need to comply with some naming rules.

1. The function name should be able to clearly express the function's function.

The function name should be able to clearly summarize the function's role and conform to the semantic rules of PHP code. For example, the function name get_user_name() clearly expresses that its function is to obtain the user's name.

2. The function name should be a verb or a verb-noun.

PHP function names are usually verbs or a combination of verbs and nouns, which can clearly express the operation of the function. For example, get_user_info(), where get is a verb and user_info is a noun.

3. The function name should use the abbreviation agreed by the system, such as str (string), int (integer), etc.

In PHP naming rules, it is very common to use word abbreviations. For example, a function that gets a user ID could be named get_user_id() instead of get_userid() because ID refers to an identifier rather than a word.

4. Function names are required to use lowercase letters.

PHP function names must use lowercase letters. Although some programming languages ​​require the first letter of the function name to be capitalized or the entire text to be capitalized, in PHP it must be all lowercase.

5. Function names should be concise and clear to improve the readability and maintainability of the code.

Good PHP function names should be concise, clear, and easy to understand to improve the readability and maintainability of the code. A good function name makes it easy for other developers to understand what the code means.

Summary

For PHP developers, the correct use of function name naming conventions and rules can not only help us improve the quality of our code, but also make our code easier to read, maintain and expand. Therefore, reasonable naming conventions and rules are an integral part of PHP development.

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