composer 常用命令

composer 常用命令

1.查看版本号

composer -V

2.更新

composer self-update

3.切换阿里源

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

4.创建或更新 composer 的自动加载器

composer dumpautoload

5.自定义类的自动加载

{
  "autoload": {
    "classmap": ["lib/", "src/", "app/Test1.php"]
  }
}

6.自定义其他非类文件的自动加载

{
  "autoload": {
    "files": ["config/database.php", "func/helper.php"]
  }
}

7.PSR-4 类命名空间映射到类文件所在的路径,类名与类文件同名,且文件中只有一个类

文件结构

acme-log-writer
   lib
      File_Writer.php

composer.json

{
  "psr-4": {
    "Acme\\Log\\Writer\\": ["acme-log-writer/lib/"]
  }
}

File_Writer.php

namespace Acme\Log\Writer;
class File_Writer
{
   public static function show()
   {
      return '当前类名:' . __CLASS__;
   }
}

echo \Acme\Log\Writer\File_Writer::show() . '<br>';

8.第三方组件库/包下载

平台:https://packagist.org/

下载方式

1.终端运行 composer require youngyezi/captcha
2.json内手工添加
  "require": {
    "youngyezi/captcha": "6.0.*"
  }
  终端运行composer install安装

9.其他常用的指令

- 更新所有包或指定的包: `composer update 空/*/包名列表空格分隔`
- 移除包: `composer remove 包`
- 查看所有包: `composer show`
- 查看指令帮助信息: `composer help install`
- 更多指令: `composer`回车后可以看到