The role of php comments

The main function of comments in PHP is:

(1) Explain the code function.

(2) Debugging program
Single-line comment //Here is the content of the single-line comment
Multi-line comment/*Multi-line comment*/
Shell-style single-line comments#Comment content

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## Several common comment methods in php:

1. Comments in the file header, introducing the file name, function, author version number and other information

/** 
*文件名简单介绍
* 
*文件功能。 
* @author      alvin 作者
* @version     1.0 版本号
*/

2. Function Comments, function functions, parameter introduction and return type

/**  
* 函数的含义说明 
* 
* @access public 
* @param mixed $arg1 参数一的说明 
* @param mixed $arg2 参数二的说明 
* @param mixed $mixed 这是一个混合类型 
* @return array 返回类型
*/

3. Class comments, class name and introduction

/** 
* 类的介绍 
* 
* 类的详细介绍（可选。）。 
* @author      alvin 作者 
* @version     1.0 版本号
*/

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