sudo apt-get install php7.0-curl
You can either do:
sudo apt-get install php php-common
sudo apt-get -f install
to solve this dependency issue, however, I would opt for the first one, the second is like solving fine details with a sledgehammer.
If this all really doesn't solve your problem, then you might as well check if you have the package repositories enabled
sudo apt-get update sudo apt-get dist-upgrade
Following procedure retrieved from chat discussion:
wget http://security.ubuntu.com/ubuntu/pool/main/p/php7.0/php7.0-common_7.0.4-7ubuntu2.1_i386.deb wget http://security.ubuntu.com/ubuntu/pool/main/p/php7.0/php7.0-curl_7.0.4-7ubuntu2.1_i386.deb sudo dpkg -i php7.0-common_7.0.4-7ubuntu2.1_i386.deb sudo dpkg -i php7.0-curl_7.0.4-7ubuntu2.1_i386.deb
Solved it. Packages for the 'amd64' architecture can be found at packages.ubuntu.com.