Analysis of the latest PHP code specification changes

Analysis of the latest PHP code specification changes

In recent years, PHP, as a programming language widely used in Web development, its code specifications have always attracted the attention of developers . As technology continues to advance and developers have higher and higher requirements for code quality, PHP code specifications are constantly evolving and updated. This article will introduce the latest PHP code specification changes and provide some code examples.

1. Changes in naming conventions

In the past PHP code specifications, the naming style separated by underscores was usually used, such as: $user_name. However, with the widespread promotion of PSR specifications, Camel Case has become a more popular naming style. Therefore, in the latest PHP code specifications, it is recommended to use camel case naming to name variables, functions and class names, such as: $userName.

The following is an example of variables and functions using camel case naming:

<?php

$userName = "John";

function getUserInfo() {
    // 代码逻辑
}

2. Indentation and space specifications

In the latest PHP code specifications, indentation There have also been some changes in the use of spaces. Past specifications usually recommended using 4 spaces or tabs for indentation, but in the new specification, 2 spaces are recommended for indentation. It is also recommended to add spaces around operators and keywords to increase the readability of your code.

The following is a code example that uses 2 spaces for indentation and reasonable spaces:

<?php

function calculateSum($num1, $num2) {
  // 代码逻辑
  // ...
  
  $sum = $num1 + $num2;
  
  return $sum;
}

3. Parameter specifications for functions and methods

In the past PHP code specifications , the parameters of functions and methods are usually named using underscores, for example: function foo($bar_value). However, according to the latest specifications, it is recommended to use camel case naming for parameters to increase code consistency.

The following is an example of function parameters using camel case naming:

<?php

function calculateSum($num1, $num2) {
  // 代码逻辑
  // ...
  
  $sum = $num1 + $num2;
  
  return $sum;
}

$result = calculateSum(10, 20);
echo $result; // 输出 30

4. Changes in comment specifications

In the latest PHP code specifications, the writing of comments has Some changes. Traditional PHP comments usually use // or # tags, while the new specification recommends using block comments (/* ... /) to describe functions, classes, and methods. At the same time, requirements for variable and attribute annotations are added to improve code readability and maintainability.

The following is a code example using block comments and variable comments:

<?php

/**
 * 计算两个数的和
 *
 * @param int $num1 第一个数
 * @param int $num2 第二个数
 * @return int 两个数的和
 */
function calculateSum($num1, $num2) {
  // 代码逻辑
  // ...
  
  $sum = $num1 + $num2;
  
  return $sum;
}

$result = calculateSum(10, 20);
echo $result; // 输出 30

Summary:

This article introduces the latest PHP code specification changes and provides some code examples . In actual development, following specifications and writing code that conforms to specifications can improve code quality, readability, and maintainability. As PHP technology continues to develop, I believe that code specifications will continue to evolve and improve, helping developers write better PHP code.

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