How to find the web server location of html, php files on a remote machine?

 I had to make modifications on a remote machine.But i did not know the location where web server files html or php are located.

ssh username@remotehost
password: #####

bash$cat /etc/httpd/conf/httpd.conf | grep DocumentRoot

# DocumentRoot: The directory out of which you will serve your
DocumentRoot "/var/www/html"

cd /var/www/html

There I was in the directory to proceed further,