You can use the CGI module to access such parameters e.g. 
use CGI;
my $query = CGI->new;
my $id = $query->param('id');

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or 
use CGI qw/:standard/;
my $id = param('id');

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Have you read ovid's tutorial on Web Programming Using Perl?

update: I've assumed you'll be using a CGI script in which case you'd typically pass the parameter like: 

http://www.perlmonks.org/cgi-bin/test.cgi?id=1

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In reply to Re: Passing variables via internet links by Arunbear
in thread Passing variables via internet links by cdherold

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