You mistake is (almost assuredly) in assigning it to a hash. Rather than code that says: 
my %param = URI->new('/?foo=Zoo&foo=aha')->query_form;

[download]
you should respect that you have multiple values associated with a given key, and use hashes of arrays (perllol, HASHES OF ARRAYS): 
my @list = URI->new('/?foo=Zoo&foo=aha')->query_form;
my %param;
while (@list) {
    push @{$param{shift @list}}, shift @list;
}

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or something similar.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In reply to Re: Question about URL query strings by kennethk
in thread Question about URL query strings by frodo2014

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