预期学习目标composer的学习基本composer的编写项目中composer的使用软件包管理基本配置镜像# 全局配置composer config -g repo.packagist composer https://packagist.laravel-china.org# 项目配置composer config repo.packagist composer https://packagist.laravel-china.org# 取消镜像composer config -g –unset repos.packagist # 查看配置composer config -l终端代理只在当前终端有效永久代理设置: 将代理命令写入配置文件 ~/.profile 或 ~/.bashrc 或 ~/.zshrc 中：当前终端有效: 在当前终端输入命令# Windows HTTP代理set http_proxy = http://127.0.0.1:1080set https_proxy = http://127.0.0.1:1080# Windows SOCKS5 代理set http_proxy = socks5://127.0.0.1:1080set https_proxy = socks5://127.0.0.1:1080# Windows 取消终端代理set http_proxy =set https_proxy =# Linux HTTP代理export http_proxy = http://127.0.0.1:1080export https_proxy = http://127.0.0.1:1080# Linux SOCKS5 代理export http_proxy = socks5://127.0.0.1:1080export https_proxy = socks5://127.0.0.1:1080# Linux 所有 SOCKS5 代理export ALL_PROXY = socks5://127.0.0.1:1080# Linux 取消终端代理unset http_proxyunset https_proxyunset ALL_RPOXY基本命令Composer 使用技巧与要点# 终端查看安装列表composer show# 添加拓展composer require repository/package# 删除拓展composer remove repository/package# 全局添加扩展composer global require repository/package# 全局删除拓展composer global remove repository/package问题解决requires ext-dom * -> the requested PHP extension dom is missing from your system.# 缺少 ext-dom,该拓展是用来读 取xml的,安装 php-xml 即可yum install php-xml自动加载相关文章后端相关技能（一）：数据库后端相关技能（二）：Vue框架后端相关技能（三）：正则表达式后端相关技能（四）：计算机网络后端相关技能（五）：Node.js后端相关技能（六）：压力测试后端相关技能（七）：依赖包管理