protected function inputConv(string $str): string
    {
        if ($str === '') {
            return '';
        }

        // we don't want the header so first 4 bytes are stripped
        return \substr(\iconv($this->encoding, 'UTF-32', $str), 4);
    }
protected function inputConv(string $str): string
    {
        if ($str === '') {
            return '';
        }

        // we don't want the header so first 4 bytes are stripped
        return \substr(\iconv($this->encoding, 'UTF-32', $str), 4);
    }
protected function inputConv ( string $ str ) : string { if ( $ str === '' ) { return '' ; } // we don't want the header so first 4 bytes are stripped return \ substr ( \ iconv ( $ this -> encoding , 'UTF-32' , $ str ) , 4 ) ; }
convert the input string to UTF-32 without header
convert the input string to UTF - 32 without header