How to add "=image()" formula in $stream->writeCsv() CSV export?

Please help me I want to keep formula while export csv file.

Thanks in advance.

1 Answer 1


I got the answer. We can not able to add formula in CSV file because of Magento2 add ' '(Empty space) where add ('=', '+', '-').

Check the bellow file path and code you will get it.


if (isset($value[0]) && in_array($value[0], ['=', '+', '-'])) {
    $data[$key] = ' ' . $value;

Because of Security enhancement for CSV data processing by Excel-like applications.


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