因为LNMP 0.9禁用了部分存在危险的PHP函数，其中包含了scandir()，出现的情况就是
Warning: scandir() has been disabled for security reasons in /home/wwwroot/yourdomain.com/wp-includes/class-wp-theme.php on line 978
Warning: Invalid argument supplied for foreach() in /home/wwwroot/yourdomain.com/wp-includes/class-wp-theme.php on line 981
我们去编辑下php.ini文件即可：vi /usr/local/php/etc/php.ini；寻找disable_functions字符串，将后面的scandir删除掉。
重启PHP即可解决：/etc/init.d/php-fpm restart
