Code specifications in PHP

PHP is a programming language widely used in web development. Defining a good code specification can improve the readability of the code, reduce the probability of errors, and make the code easier to maintain. In PHP, code specifications are particularly important. This article will introduce common coding specifications in PHP.

1. Indentation style

Indentation is a very important way of formatting programming languages. For PHP, we use a 4-space indentation method. This indentation makes it easier to read the structure of the code and makes the code look cleaner. This is done automatically by your editor. Also, don't add tabs after indented spaces.

2. Variable Name

Variable names should be named in a semantic manner so that others can quickly understand the meaning of the variable. Use all lowercase letters when possible to represent variable names, and use underscores to separate words, such as:

$user_name = 'John Smith';

3. Function name

Function names should follow the same rules to make it easier to change Organize and maintain code well. Function names should also be in all lowercase letters, using underscores to separate words.

4. Code line width

Each line should be kept to no more than 80 characters as much as possible. This helps code readability and reduces unnecessary scrolling.

5. Code Comments

Comments are an important part of the code. Comments should explain what the variable or function does and how to use them. Comments should contain explanations of special cases, such as when a function requires specific input or output. Comments should be divided into paragraphs appropriately, with appropriate punctuation and spacing to make them easy to read.

6. Directory and file naming

Directories in PHP should be named in all lowercase letters, with underscores separating words. The same should be used for file names. All lowercase letters and underscores. Additionally, the file should be named the same as the containing class or function.

7. Use of spaces

In PHP, spaces should be added between operators and variables, between keywords and brackets, and between commas and variables to Improve code readability. But no space should be added between the function name and the brackets.

8. Code block braces

In PHP, code block braces should be on a line by themselves, and there should be no other code on the same line.

// 正确示例
if ($condition) {
    // do something
}

// 错误示例
if ($condition) { // do something }

In short, in PHP, following correct coding specifications can help developers write code that is easier to maintain and understand. For example, comments should be clear, variables and functions should have meaningful names, spaces and braces should be used appropriately, etc. If you can adopt these specifications correctly, your code will also become high-quality PHP code.

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