$array = preg_grep('/[^$]/', $array);

$zip_code = str_replace(' ','','ZIP CODE');

    $pattern = array(
      array(
        '/^[[:alnum:]]{6,6}+$/',
        '/[[:alpha:]]/',
        '/[[:digit:]]/'
      ),
      array(
        '/^(\d){5,5}+$/'
      )
    );
        $is_zip_code = true
    for($_j = 0; $_j < count($pattern[$_i]); $_j++){
      $is_zip_code = ($is_zip_code and preg_match($pattern[$_i][$_j],$zip_code));
    }