private function convertString($string)
    {
        // chop away beggining and ending quotes
        $string = substr($string, 1, -1);
        if (strlen($string) > 255) {
            throw new WriterException('String is too long');
        }

        return pack('C', $this->ptg['ptgStr']) . StringHelper::UTF8toBIFF8UnicodeShort($string);
    }
private function convertString($string)
    {
        // chop away beggining and ending quotes
        $string = substr($string, 1, -1);
        if (strlen($string) > 255) {
            throw new WriterException('String is too long');
        }

        return pack('C', $this->ptg['ptgStr']) . StringHelper::UTF8toBIFF8UnicodeShort($string);
    }
private function convertString ( $ string ) { // chop away beggining and ending quotes $ string = substr ( $ string , 1 , - 1 ) ; if ( strlen ( $ string ) > 255 ) { throw new WriterException ( 'String is too long' ) ; } return pack ( 'C' , $ this -> ptg [ 'ptgStr' ] ) . StringHelper :: UTF8toBIFF8UnicodeShort ( $ string ) ; }
Convert a string token to ptgStr.

@param string $string a string for conversion to its ptg value

@return mixed the converted token on success
Convert a string token to ptgStr .