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

        return $data;
    }
public function writeData($data)
    {
        if (strlen($data) - 4 > $this->limit) {
            $data = $this->addContinue($data);
        }
        $this->_datasize += strlen($data);

        return $data;
    }
public function writeData ( $ data ) { if ( strlen ( $ data ) - 4 > $ this -> limit ) { $ data = $ this -> addContinue ( $ data ) ; } $ this -> _datasize += strlen ( $ data ) ; return $ data ; }
General storage function like append, but returns string instead of modifying $this->_data.

@param string $data binary data to write

@return string
General storage function like append but returns string instead of modifying $this - > _data .