php命令添加到path环境变量里面
错误：Warning: copy(): Unable to find the wrapper "https"
php.ini中把extension=php_openssl.dll前面的“;”删掉就行了
在命令行里，依次执行
php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"
php composer-setup.php
php -r "unlink('composer-setup.php');"
在php.exe同级目录建立文件composer.bat。内容是
@php "%~dp0composer.phar" %*
查看版本
composer --version
更新composer
composer selfupdate
添加国内镜像
composer config -g repo.packagist composer https://packagist.phpcomposer.com
阿里云：
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
cnpkg：
composer config -g repos.packagist composer https://php.cnpkg.org
华为云：
composer config -g repo.packagist composer https://mirrors.huaweicloud.com/repository/php/
腾讯云：
composer config -g repos.packagist composer https://mirrors.cloud.tencent.com/composer/
创建项目
composer create-project doctrine/orm path 2.2.*
引入composer包
composer require phpword/phpword:dev-master
composer require loveorigami/yii2-plugins-system 3.1.4
