I have several name based virtual hosts on different drives on an IIS5 server with PHP4.03 ISAPI version. At present docroot and open_basedir are unset and php access works for all hosts. However a user on one server can write php files to access files on another. How can I restrict users to the doc root for their own virtual server. There is only one php.ini file. Apache lets you put directives into the httpd.conf file for each virtual directory. What is the equivalent solution for IIS?