We have just come across a problem which was preventing a customer from installing php7.2-zip on Ubuntu 18.04 LTS.
Whenever they tried to install it via apt. it would bomb out with;
root@lamp ~ # apt install php7.2-zip php7.2-common Reading package lists... Done Building dependency tree Reading state information... Done php7.2-common is already the newest version (7.2.10-0ubuntu0.18.04.1). php7.2-common set to manually installed. Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: php7.2-zip : Depends: php7.2-common (= 7.2.3-1ubuntu1) but 7.2.10-0ubuntu0.18.04.1 is to be installed E: Unable to correct problems, you have held broken packages.
This was caused by the server missing a repo in its sources.list. Add in the security universe repo and it will install normally
The following solution fixes the issue;
echo "deb http://security.ubuntu.com/ubuntu bionic-security main universe" >> /etc/apt/sources.list apt update apt install php7.2-zip