I have a script (not mine) which I'm trying to add a couple of things to. I have always used CGI.pm to extract parameters, but in this script environment variables are used: 
read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
@pairs = split(/&/, $buffer);
foreach $pair (@pairs) {
    ($name, $value) = split(/=/, $pair);
    $value =~ tr/+/ /;
    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
    if ($INPUT{$name}) { $INPUT{$name} = $INPUT{$name}.",".$value; }
    else { $INPUT{$name} = $value; }
}

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The information currently picked up from the form is: 
if ($INPUT{'onething'} eq "onething") { &onething; }
elsif ($INPUT{'onething'} eq "twothing")  {&twothing; }
elsif ($INPUT{'threething'}) {threething; }
else {&formula; }
exit;

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I tried to get my checkboxes to function using: 
if ($INPUT{'fourthing'} eq "four") {
$address = "four.txt";
}  elsif ($INPUT{'fourthing'} eq "five") {
$address = "five.txt";
}    elsif ($INPUT{'fourthing'} eq "six") {
$address = "six.txt";
}    else  {&formula; }

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But alas $address remains undefined.

I would be grateful if someone would point me in the right direction. (I could just rewrite it for CGI.pm but I would miss an opportunity of learning some more about environment vars - hence the question. :))

In reply to Extracting name value pairs from Environment Variables by jonnyfolk

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