1 centos下安装
yum install php-pdo_mysql
2 docker下安装
1）docker exec -it php-fpm /bin/bash
2）个人习惯，进入/usr/src扩展目录
3）docker-php-ext-install pdo pdo_mysql
4）重启容器 docker restart php-fpm
https://www.cnblogs.com/riyuexingchen/p/14036120.html
3 重启php服务
systemctl restart php-fpm.service
