How to make a soft transition from php 5.6 to 7.*?

Question

PHP

Hello!
Finally, all sites on VPS with Ubuntu server 16.4 were transferred to work with puff 7 versions.
Now everything is working stably, but sooner or later it will be necessary to switch and it is better to do it now and not when the sites just stop working.
PS Php running in php-fpm mode

Answer 1

You remove all php packages, install new repositories with php7.3, install
fpm and re-packages and you're done, in nginx you change the port or path to the daemon.

Answer 2

PHP-FPM works with either Nginx or Apache.
Install the correct version and connect to the web server.

Answer 3

To get started, check out the list of changes from version 5.6 to 7.3.
During the transition, there are some nuances that are reflected in the work of functions, libraries, and class declarations.