Why doesn't mb_strtolower work in Vagrant?

Question

linux

Virtual machine - Ubuntu 16.04
Installed locale ru_RU.UTF-8 via sudo locale-genand localectl set-locale LANG=, got the following result:

vagrant$locale

LANG=ru_RU.utf8
LANGUAGE=
LC_CTYPE="ru_RU.utf8"
LC_NUMERIC="ru_RU.utf8"
LC_TIME="ru_RU.utf8"
LC_COLLATE="ru_RU.utf8"
LC_MONETARY="ru_RU.utf8"
LC_MESSAGES="ru_RU.utf8"
LC_PAPER="ru_RU.utf8"
LC_NAME="ru_RU.utf8"
LC_ADDRESS="ru_RU.utf8"
LC_TELEPHONE="ru_RU.utf8"
LC_MEASUREMENT="ru_RU.utf8"
LC_IDENTIFICATION="ru_RU.utf8"
LC_ALL=ru_RU.utf8

I tried to run mb_strtolower('Какой-то текст', 'UTF-8')- the script crashed. I went to the VPS (everything works there), looked at the settings:

VPS$locale

LANG=ru_RU.utf8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8

I did the same for myself, the script still crashes. I tried mb_strtolowerwardumping and putting it in try-catch - it doesn't report anything. Maybe something else needs to be configured in the virtual system or needs to be registered in the Vagrantfile?

Answer 1

Deyv Horni @DeyvHorni
maybe the php-mbstring extension isn't installed at all?

Answer 2

Maybe you don't have the mb module installed?