I have the
Memcached Daemon running on my server but some plugins for wordpress don't see it (i.e. W3 total Cache).
Do I need to configure it as a PHP extension to use it?
I've found this answer: W3 Total Cache doesn't detect memcached and this article https://www.howtoforge.com/installing-memcached-and-the-php5-memcache-module-on-debian-etch-apache2
but some explanation would be very useful