1:
修改apt软件源
打开文件 /etc/apt/sources.list
添加如下行
deb http://packages.dotdeb.org jessie all
2:
Fetch the repository key and install it.
wget https://www.dotdeb.org/dotdeb.gpg
sudo apt-key add dotdeb.gpg
3:
sudo apt-get update
4:
sudo apt-get install php7.0-fpm
sudo apt-get install php7.0-mysql
5:
更新nginx socket path
vitual server中的 fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
6:重新启动nginx与nginx fpm
service nginx restart
/etc/init.d/php7.0-fpm restart
原文：http://www.cnblogs.com/wlemory/p/5639014.html