次の設定ファイルを編集します。(コメントアウトを外して微調整します)
# vi /etc/php-fpm.d/www.conf 
# ------------------------------------------------------
server {
・・・中略
; RPM: apache Choosed to be able to access some dir as httpd
user = nginx
; RPM: Keep a group allowed to write in log dir.
group = nginx
・・・中略
# vi /etc/nginx/conf.d/default.conf
# ------------------------------------------------------
server {
・・・中略
    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm index.php;
    }
・・・中略
    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    location ~ \.php$ {
        root           /usr/share/nginx/html;
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        #fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }