Php7在nginx上安装wordpress投掷PHP安装缺少WordPress所需的MySQL扩展

我怎样才能解决这个问题?即时尝试在ubuntu 16上运行nginx for Php7,干净安装wordpress
当我访问:
http://blog.mysite.com/wordpress/
我明白了:
Your PHP installation appears to be missing the MySQL extension which
is required by WordPress.
我该如何解决这个问题?
解决方法:
只需安装必要的扩展并重新启动fpm进程:
sudo apt-get install php-mysqlnd php-mysqli
sudo /etc/init.d/php7.0-fpm restart