cd /usr/local/src/
wget
http://pecl.php.net/get/memcached-2.2.0.tgztar zxfv memcached-2.2.0.tgz
cd memcached-2.2.0
make clean
/opt/atomic/atomic-php54/root/usr/bin/phpize && ./configure --with-php-config=/opt/atomic/atomic-php54/root/usr/bin/php-config && make && make install
echo "extension=memcached.so" > /opt/atomic/atomic-php54/root/etc/php.d/memcached.ini
make clean
/opt/atomic/atomic-php55/root/usr/bin/phpize && ./configure --with-php-config=/opt/atomic/atomic-php55/root/usr/bin/php-config && make && make install
echo "extension=memcached.so" > /opt/atomic/atomic-php55/root/etc/php.d/memcached.ini