After nginx and php-fpm are installed, a download box is displayed when the php page is opened in the firefox browser, instead of a direct page?

After nginx and php-fpm are installed, a download box is displayed when the php page is opened in the firefox browser, instead of a direct page? The nginx and php-fpm services have been enabled. The nginx configuration file's php processing configuration

My php page is written in/usr/share/nginx/html
What can I do? thank you.

Reply to discussion (solution)

Make sure that the php-fpm service is enabled. If you confirm that the php-fpm service is enabled, remove the root option in the configuration. Root is placed in another rule, such as accessing some resource files.