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

I had the same issue and it was due to building PHP from source with ./configure --with-mcrypt option. It seems that if PHP is built with the --with-mcrypt flag, then there is no need to specify extension=mcrypt.so in php.ini. Doing so causes the warning mentioned above.