How to Easily Create a Blank Favicon with Code (Fix 404 Errors)

I do a lot of speed testing in my line of work. Usually, I’m testing the performance of the default WordPress theme on a fresh install to use as a baseline. Or perhaps running a comparison for a client. Being that Kinsta makes it incredibly easy to create new installs and snapshots, I’m constantly destroying and spinning up new WordPress sites from scratch. One issue that I run into every single time is that speed testing tools like Pingdom and WebPageTest complain about a missing favicon (404 error). Talk about first world problems.
Source: https://managewp.org/articles/18252/how-to-easily-create-a-blank-favicon-with-code-fix-404-errors

source https://williechiu40.wordpress.com/2019/01/02/how-to-easily-create-a-blank-favicon-with-code-fix-404-errors/