(PECL zmq >= 0.5.0) Count items in the poll set

(PECL event >= 1.4.0-beta) Sets maximum HTTP header size

(PECL memcached >= 0.1.0) Create a Memcached instance

(PECL zmq >= 0.5.0) Get poll errors public

(PHP 4, PHP 5, PHP 7) Sends a SITE command to the server

(PECL event >= 1.4.0-beta) Send another data chunk as part of an ongoing chunked reply

(PECL event >= 1.8.0) Set callback for connection close

(PHP 5, PHP 7) Copy a cURL handle along with all of its preferences

(PECL event >= 1.2.6-beta) Makes timer event pending

(PECL svm >= 0.1.4) Return class probabilities for previous unseen data