This is a known issue in CGI that can potentially lead to vulnerabilities, which can be read about here.

Essentially, if you want to obtain a list, the documentation mentioned above states to use multi_param():

my @values = $query->multi_param('foo');

[download]

...and for individual items (scalar context), use the original param() method:

my $value = $query->param('foo');

[download]

-stevieb

In reply to Re: CGI problem: USING THE FUNCTION-ORIENTED INTERFACE by stevieb
in thread CGI problem: USING THE FUNCTION-ORIENTED INTERFACE by PhillipHuang

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