No expert here but...
I would restrict "use CGI" to common_subs.pm and let it handle all CGI related stuff. In my main script, I wouldn't expect to call "use CGI" since everything that I need for CGI parsing should already have been done via common_subs.
Without a templating system like HTML::Template, you would most likely be mixing program code with html. This can lead to ugly, bloated code and possibly maintenance problems, especially as your code grows. So it's better to make use of a templating engine such as HTML::Template to allow you to move the html out of your code. That way, the resultant code is leaner and so easier to read and maintain.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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