See the right sidebar for your download options. Or build from source.
After download, unpack the archive:
$ tar xzf php-couchbase-memcached-$system-$arch.tar.gz
The resulting directory include a file memcached.so that is the PHP extension for your system.
Edit your php.ini to include this line:
To find where you php.ini file is, try
'phpi -i | grep
memcached' or look at your