I am writing CGIs in Perl. I have a first CGI (e.g. called CGI1)
which generates a web page. I then want to modify this web page
with a second CGI (e.g. CGI2). I would therefore like to be
able to call CGI1 within CGI2 and direct the output of CGI1
into a string that I can then manipulate within CGI2.
How do you do that?