Would I be breaking the law by allowing a "-" and updating the code to:
sub filter {

  my $str = shift;
  defined $str or return '';
  $str =~tr{A-Za-z0-9_.-}{}cd;

  return $str;
}

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In reply to Re^3: Filtering unwanted chars from input field by Anonymous Monk
in thread Filtering unwanted chars from input field by Anonymous Monk

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