PHP warning : Module 'mcrypt' already loaded

Question

When I run a command with PHP, it shows me an error. E.g when I run php -v to see my PHP-version it shows me an error then the informations about PHP:

Answer 1

Your php.ini contains two or more of these lines:

extension=mcrypt.so

Remove all except one.

php.ini usually lives in /etc/php.ini or /etc/php5/php.ini. Sometimes additional .ini files are included, you can see all of them with:

$ php -i | grep .ini\$
Loaded Configuration File => /usr/local/etc/php.ini
Additional .ini files parsed => /usr/local/etc/php/extensions.ini
user_ini.filename => .user.ini => .user.ini