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  1. or download this
       
use strict;
use CGI;
...

$cgi = new CGI;
%IN = $cgi->Vars; #%IN = (param1 => value1, param2 => value2 , etc..);
  2. or download this
    if (defined $IN{location}) {
   $where .= "AND (location = '$IN{location}[0]'";
   for my $i (@{$IN{location}}) { $where .= "$i" };
   $where = "$where)";
}
  3. or download this
    
delete $IN{somekey};
...
$sql = "$function $tablename ($key_string) values ($value_string)";
$sth = $dbh->prepare($sql);
$sth->execute();