How to start Bitrix on php 7.2?

Question

1C-Bitrix

Good afternoon!
There was a problem when using the regular deployment of Bitrix and the entire system as a whole, when I found out that our server is on php 7.2.1
Actually -
The site worked in UTF-8 encoding. The server configuration does not meet the requirements.
To continue, set the PHP settings: mbstring.func_overload=2 and mbstring.internal_encoding=UTF-8.
These functions no longer work, or rather they work but produce a different result.
Is there a way to bypass and launch Bitrix in order to exclude these functions and not rebuild the web environment because of one Bitrix site?

Answer 1

is it possible to upgrade php version to 7.2.8?
or roll back to 7.1?
Otherwise dancing with a tambourine

Answer 2

or maybe there is no extension, run on the server php -m, if there is no mbstring in the list, you need to put:
sudo apt-get install php7.2-mbstring