Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/BIFFwriter.php
protected function append($data)
    {
        if (strlen($data) - 4 > $this->limit) {
            $data = $this->addContinue($data);
        }
        $this->_data .= $data;
        $this->_datasize += strlen($data);
    }
protected function append($data)
    {
        if (strlen($data) - 4 > $this->limit) {
            $data = $this->addContinue($data);
        }
        $this->_data .= $data;
        $this->_datasize += strlen($data);
    }
protected function append ( $ data ) { if ( strlen ( $ data ) - 4 > $ this -> limit ) { $ data = $ this -> addContinue ( $ data ) ; } $ this -> _data .= $ data ; $ this -> _datasize += strlen ( $ data ) ; }
General storage function.

@param string $data binary data to append
General storage function .