I have OpenCart 2.3.0.2 installed on localhost, I want to use PhpSpreadsheet library for my OpenCart project. Does anyone here have used them? I confuse on how to call the library. I want to upload Excel data for a product. This Excel data will be uploaded to folder and insert all data on that sheet to my database.
I have uploaded Spreadsheet folder to system/library, tried to call the function, it always failed.