(PECL memcached >= 0.1.0) Replace the item under an existing key

(PECL memcached >= 0.1.0) Append data to an existing item on a specific server

(PECL memcached >= 0.1.0) Map a key to a server

(PECL memcached >= 0.1.0) Request multiple items from a specific server

(PECL memcached >= 0.1.0) Compare and swap an item

(PECL memcached >= 2.0.0) Delete multiple items

(PECL memcached >= 2.0.0) Set Memcached options

(PECL memcached >= 0.1.0) Add a server to the server pool

(PECL memcached >= 0.1.0) Retrieve an item

(PECL memcached >= 2.0.0) Set a new expiration on an item on a specific server