How to use Gulp 4 with SASS, PHP and BrowserSync

Here’s a gulpfile.js, tested with gulp.js 4.0.0 and BrowserSync 2.26.3
It also uses the Tailwind CSS framework.

View example gulpfile.js on GitHub 

Here’s a good beginner’s guide to Gulp (although the syntax for task execution has changed in 4.0.0, you need to use gulp.series or gulp.parallel)