Nginx访问PHP提示 An error occurred.

解决办法：重新启动 php-fpm  :  systemctl restart php-fpm

  centos 7 命令 ：

  systemctl start php-fpm

  systemctl stop php-fpm

  systemctl restart php-fpm

  systemctl reload php-fpm

  centos 6 命令 ：

 

service php-fpm start

service php-fpm stop

service php-fpm restart

service php-fpm reload