Problem with libicu66 during installation php-intl extension on Ubuntu 21.10
Solution 1:
Panic canceled
just download binary
wget http://archive.ubuntu.com/ubuntu/pool/main/i/icu/libicu66_66.1-2ubuntu2_amd64.deb
And install it manually:
sudo dpkg -i libicu66_66.1-2ubuntu2_amd64.deb
After that you can install php-intl:
sudo apt-get install php7.0-intl
Now the installation is successful