IsoCodes\OrganismeType12NormeB2::validate PHP Method

    public static function validate($code = '', $key = -1)
    {
        if (strlen($key) < 1) {
            return false;
        }
        if (!is_numeric($key)) {
            return false;
        }
        if (!is_string($code)) {
            return false;
        }
        if (strlen($code) < 2) {
            return false;
        }
        $numerals = str_split($code);
        $rank = array_reverse(array_keys($numerals));
        $orderedNumerals = array();
        foreach ($rank as $i => $rankValue) {
            $orderedNumerals[$rankValue + 1] = $numerals[$i];
        }
        $results = array();
        foreach ($orderedNumerals as $cle => $value) {
            $results[$value] = $cle % 2 == 0 ? $value * 1 : $value * 2;
        }
        $sum = 0;
        foreach ($results as $cle => $value) {
            $sum += array_sum(str_split($value));
        }
        $validKey = str_split($sum);
        $validKey = 10 - array_pop($validKey);
        return $key === $validKey;
    }

 /**
  * testInvalidOrganismeType1_2NormeB2
  *
  * @param string $code
  * @param int    $clef
  *
  * @dataProvider getInvalidValues
  *
  * @return void
  */
 public function testInvalidValues($code = "", $clef = 0)
 {
     $this->assertFalse(OrganismeType12NormeB2::validate($code, $clef));
 }