Happy new year all! Just a quick post about how to install Memcache in PHP on an Ubuntu or Debian server (I think it will apply to Redhat based servers, just substitute the apt-get for yum).
Log on to your server as root (either directly or using sudo su), then install the Memcache daemon through apt:
apt-get install memcached
pecl install memcache
This will install the memcache extension, and once done will tell you to add the the line “extension=memcache.so” into your php.ini file. I prefer keeping these in separate files (so that the php.ini file can be updated). The easy way to do this is:
echo "extension=memcache.so" > /etc/php5/conf.d/memcache.ini
And finally, reload Apache
If successful, Memcache will now appear in your phpinfo().