示例：
1、docker-php-ext-install pdo_mysql
2、extension=php_pdo_mysql.dll
一、docker按照PHP扩展
先删除原来的composer容器，重新执行以下命令：
docker run -it --name composer -v E:\docker\nginx\www\YYXTServer:/app --privileged=true composer
二、docker按照php的gd扩展
#容器中
#软件源修改为网易镜像站源在安装过程中会报错，要更改为以下源：
#echo "deb http://mirrors./debian stable main contrib non-free
deb-src http://mirrors./debian stable main contrib non-free
deb http://mirrors./debian stable-proposed-updates main contrib non-free
deb-src http://mirrors./debian stable-proposed-updates main contrib non-free
" > /etc/apt/sources.list
apt update #更新软件源
apt install -y libwebp-dev libjpeg-dev libpng-dev libfreetype6-dev #安装各种库
docker-php-source extract #解压源码
cd /usr/src/php/ext/gd #gd源码文件夹
docker-php-ext-configure gd --with-webp-dir=/usr/include/webp --with-jpeg-dir=/usr/include --with-png-dir=/usr/include --with-freetype-dir=/usr/include/freetype2 #准备编译
docker-php-ext-install gd #编译安装
php -m | grep gd
