source/Core/SepaIBANValidator.php
protected function _isAlgorithmValid($sIBAN)
    {
        $sIBAN = $this->_moveInitialCharactersToEnd($sIBAN);

        $sIBAN = $this->_replaceLettersToNumbers($sIBAN);

        return $this->_isIBANChecksumValid($sIBAN);
    }
protected function _isAlgorithmValid($sIBAN)
    {
        $sIBAN = $this->_moveInitialCharactersToEnd($sIBAN);

        $sIBAN = $this->_replaceLettersToNumbers($sIBAN);

        return $this->_isIBANChecksumValid($sIBAN);
    }
protected function _isAlgorithmValid ( $ sIBAN ) { $ sIBAN = $ this -> _moveInitialCharactersToEnd ( $ sIBAN ) ; $ sIBAN = $ this -> _replaceLettersToNumbers ( $ sIBAN ) ; return $ this -> _isIBANChecksumValid ( $ sIBAN ) ; }
Checks if IBAN is valid according to checksum algorithm

@param string $sIBAN IBAN

@return bool
Checks if IBAN is valid according to checksum algorithm