Source code of the Google Sheets PHP connector
Summary: If you want to use Google Sheets with your PHP server-side code then this connector lets you do that.
This is the PHP version of the RGraph Google Sheets connector library. Use it if you want to hide the fact that you're using Google Sheets or if you have server-side code that needs to connect to a Google Sheets spreadsheet.
It's written in PHP but if you need to convert it to a different coding language it should be quite readable code for you to do so.