PHP Startup: Unable to load dynamic library `curl.so` Ubuntu
Update php5.6(-common) to a newer version. This can be done using apt-get update && apt-get upgrade. You have just updated php5.6-curl to the latest version but it depends on a newer php5.6.
If anyone is facing the same Problem with php 7.0.I removed the old "curl" with sudo apt-get remove "curl" and installed the Version for php 7.0 with sudo apt-get install php7.0-curl.
The Message is now gone and everything is working fine.
Same issue on php7. Just did a apt-get dist-upgrade and now the warning is gone and curl works properly. Hope it helps!