PHP Based Interface for PHPSpreadsheets to MySQL work - Democratizing Data Inputs from Multiple Sources
PHPSpreadsheets - Instalaation and Most Recent Version can be found here: https://phpspreadsheet.readthedocs.io/en/latest/
Repository includes a sample index file that provides basic examples of upload, download, and filtering functionality. The index file is supported by download.php which handles processing the actual download from the MySQL database.