if you are installing Yii Framework then you will need to install Intl Extension to meets Yii requirements.
|Intl extension||Warning||Internationalizationsupport||PHP Intl extension 1.0.2 or higher is required when you want to use advanced parameters formatting in
You can do this be installing it using pecl. It will fail if you don’t have necessary libraries.
Make sure that the following is installed on apt-get (debian) such machine
apt-get install libicu-dev
apt-get install icu-devtools
pecl install intl
Once this is installed make sure that the you add extension to php.ini
and reload your apache
service apache restart
You can check where your php.ini by issuing the following command:
php -i | grep “php.ini”