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php-export-data
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https://github.com/PHPOffice/PHPExcel is unmaintained / archived
https://github.com/elidickinson/php-export-data is unmaintained / archived too
I think https://github.com/PHPOffice/PhpSpreadsheet is what you're looking for. I've been using it for many years for an export generator, well maintained and working nicely.
We were testing PHP Spreadsheet and Spout (https://github.com/box/spout). We chose Spout because of its low memory footprint. It is using streams so it is much lighter than PHP Spreadsheet, although it is missing quite a bit of features that PHP Spreadsheet has.