## 序言【注意：composer有版本差异，请选择合适版本】 > #### Composer手册阅读须知（使用左右键（`<-- 和 -->`）翻页阅读）  * * * # Composer——使用说明 ### V1.0版本由[看云](https://www.kancloud.cn/)独家赞助发布 Composer是 PHP 用来管理依赖（dependency）关系的工具。你可以在自己的项目中声明所依赖的外部工具库（libraries），Composer 会帮你安装这些依赖的库文件 ## 常用命令： 安装命令： 方式一：composer install --ignore-platform-reqs（版本忽略） 方式二：composer require eleven26/sql-logger:~1.0.0 dev --ignore-platform-reqs 更新命令：composer update 删除命令：composer remove ## 示例： composer require biiiiiigmonster/hasin:^1.0 --ignore-platform-reqs composer install --ignore-platform-reqs composer require eleven26/sql-logger:~1.0.0 dev --ignore-platform-reqs composer install --ignore-platform-reqs composer update composer require eleven26/sql-logger:~1.0.0 --ignore-platform-reqs composer remove biiiiiigmonster/hasin composer require dev --ignore-platform-reqs curl.cainfo = D:\phpstudy_pro\Extensions\php\php7.4.3nts\extras\ssl\cacert.pem composer install --dev --ignore-platform-reqs composer update --ignore-platform-reqs "eleven26/sql-logger": "~1.0.0", composer require "eleven26/sql-logger:~1.0.0" --dev --ignore-platform-reqs 切换成阿里镜像 composer config -g repo.packagist composer https://mirrors.aliyun.com/composer composer require biiiiiigmonster/hasin:^1.0 --ignore-platform-reqs composer require dcat/laravel-wherehasin --ignore-platform-reqs composer remove biiiiiigmonster/hasin --ignore-platform-reqs composer remove dcat/laravel-wherehasin --ignore-platform-reqs composer require --ignore-platform-reqs composer remove dcat/laravel-wherehasin --ignore-platform-reqs