Yes, and all three of them has very good backwards combability, one of the most underestimated features in a language for developers but one of the most importa

Yes, and all three of them has very good backwards combability, one of the most underestimated features in a language for developers but one of the most important ones for building a stable business. I recently upgraded a huge legacy codebase from PHP 5.2 (released 2006) to PHP 7.4 (released 2019) with relatively few changes, mostly changing the use of deprecated functions & misuse of variable references.