if "alpha" is in the version of the module then most of the time it means something is missing. =P
Not a reashoring sign if your using it for security.

I check the veriables by knowing what characters it should be or what i will allow.

my $this_is_bad = '../A#\/*Bad|-Name';
my $this_is_ok = 'John Smith';

$this_is_bad = untaint($this_is_bad, '0-9a-zA-Z \_\-');
$this_is_ok = untaint($this_is_ok, '0-9a-zA-Z \_\-');

print 'Bad input at $this_is_ok' if !$this_is_ok;

print 'Bad input at $this_is_bad' if !$this_is_bad;

# if the input did not pass the veriable retured is blank
sub untaint {
my $value   = shift || '';
my $pattern = shift || '0-9a-zA-Z\_';
return '' unless $value;
$value !~ m!^([$pattern]+)$!i
 ? return
 : return $1;
}
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