CPAN is a well-known repository of perl modules. Using modules is considered good practice here. It takes some time to understand the module but it saves lot of time and brings the knowledge domain and experties of others to you in very short time. Since you are doing CGI related stuff, I would mention CGI.pm as well.

Practicing art of using modules,
Aritst

Is just because I'm doing an assignment with some restrictions, in other words I'm not allowed to use any external modules. Regards

Please read the About Homework section of How do I post a question effectively?. This document is listed in the Perl Monks FAQ which helps newcomers understand how the Perl Monks community operates.

If you can't rely on "installed" stuff to be there, include it with your program. If you can't load other files at all, just look at the interesting code in that module and copy some of it to your own main file.

And Real Programmers don't take "not allowed" as an answer. Has to be a real reason, with purpose explained.

John M. Dlugosz++

(but if you're going to copy the good bits out of a module, remember to change the variable names and the formating to protect the guilty)

rdfield

Makeshifts last the longest.