ACGI program receives three types of information from the server:
Client request information
We look at each of these in turn.
The webserver makes available to the CGI script information about the current request called session information. This information can be retrieved with several provided methods.
Client information consists of the following:
remote_host()— the name of the client machine
user_name()— the name of the user if authenticated
user_agent()— the browser that the user is surfing with
referer()— the referer (remember, this is misspelled)
path_info()— the path information
query_string()— the query string
The first four items are ...