下载 php 脚本而不是处理它

我有一个带有 centos 7 的虚拟服务器，安装了 nginx + php-fpm，我无法配置 nginx 配置，以便在切换到域时处理 .php 文件，但是，在切换到域时，它提供下载一个带有 php 脚本的文件。

server {
    listen   80;
    server_name  myapptest.gq;
        root   /usr/share/nginx/html;
        index  index.php;

    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;

    #location / {
     #   root   /usr/share/nginx/html;
      #  index  index.php index.html index.htm;
    #}

        #location / {
        #   try_files $uri $uri/ /index.php?q=$uri&$args;
        #}
    #location ~* ^.+.(js|css|png|jpg|jpeg|gif|ico)$ {
        #   access_log        off;
        #   expires           max;
        #}

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    location ~ \.php$ {
        root php;
        #fastcgi_param  DOCUMENT_ROOT    /myapptest.gq;
        #fastcgi_pass unix:/var/run/php-fpm.sock;
        #fastcgi_pass 127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
       include        fastcgi_params;
    }

    # deny access to .htaccess files, if Apache's document root
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    location ~ \.php$ {
        root php;
        #fastcgi_param  DOCUMENT_ROOT    /myapptest.gq;
        #fastcgi_pass unix:/var/run/php-fpm.sock;
        #fastcgi_pass 127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
       include        fastcgi_params;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}