I can not understand why the curl library is not installed?

Question

linux

Hello everyone,
I needed the curl library, but when installing with the command: it
sudo apt-get install php7.0-curl
gives an error

php-common is installed by itself:

I already tried it
sudo apt-get install php7.0-curl
and it still didn’t help.
although the command:
sudo apt-get install php7.0-curl
sudo apt-get install curl
was installed,
but the curl.so file itself is nowhere to be found.
please help me figure it out.
Actually:
OS: xubuntu 16.04
LAMP
php7.0 from standard reps.

Answer 1

Personal experience of installing under CentOS
yum install php-curl
The module did not turn on in any way until I registered the folder with extensions
/usr/lib64/php/modules/
and added extension="curl.so"