I´m having a problem with this issue too. I´m using a DEV-System on Ubuntu 18.04 with multiple installed PHP-versions (by ondrej) connected to Apache2 with FPM-modules. I cannot install "php-curl (7.1)" (by ondrej) because it depends on "libcurl4" ... and installing libcurl4 would result in deinstalling apache2 (and several other packages) which is dependent on libcurl3.
So my problem is not on pure Ubuntu - but I personally would need both lib versions at same time.
I´m having a problem with this issue too. I´m using a DEV-System on Ubuntu 18.04 with multiple installed PHP-versions (by ondrej) connected to Apache2 with FPM-modules. I cannot install "php-curl (7.1)" (by ondrej) because it depends on "libcurl4" ... and installing libcurl4 would result in deinstalling apache2 (and several other packages) which is dependent on libcurl3.
So my problem is not on pure Ubuntu - but I personally would need both lib versions at same time.