CodeIgniter 3.1.5 On Ubuntu 16.04 and few issues

There are separate php.ini files for each SAPI. You may've enabled it only for CLI, or only for mod_php, etc. On Ubuntu, this is the easiest way to enable it for all SAPIs:

Code:

sudo phpenmod curl

Or you might've forgotten to restart/reload the configuration after enabling it.

Code:

sudo service apache2 reload # for mod_php
sudo service php-7.0-fpm reload # for FPM