服务器系统版本及网站环境：

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)
[root@localhost ~]# nginx -v
nginx version: nginx/1.11.9
[root@localhost ~]# php-fpm -v
PHP 7.1.1 (fpm-fcgi) (built: Jan 20 2017 18:12:47)
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.1.1, Copyright (c) 1999-2017, by Zend Technologies
[root@localhost ~]# mysql -V
mysql  Ver 15.1 Distrib 10.1.21-MariaDB, for Linux (x86_64) using readline 5.1