I fixed it by following this small tutorial: http://andreys.info/blog/2007-11-07/configuring-terminal-to-work-with-mamp-mysql-on-leopard
[EDIT]: I modified the right php.ini and everything's working fine now.
Now I get the following error:
[Exception] DateTime::__construct(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead
Here's the date.timezone config in php.ini
date.timezone = "Europe/Paris"
I'll try to figure it out myself but if any of you know how to fix it don't hesitate to comment on this. Thanks!