(PECL memcached >= 2.0.0) Check if a persitent connection to memcache is being used

(PHP 4, PHP 5 < 5.2.0, PECL hwapi SVN) Returns reason of error

(PHP 5 >= 5.5.0, PHP 7) Set an option for the cURL multi handle

(PECL zmq >= 0.5.0) Get the persistent id

(PECL event >= 1.2.6-beta) Free a buffer event

(PECL event >= 1.10.0) Returns the current cipher name of the SSL connection.

(PECL event >= 1.2.6-beta) Disables an event connect listener object

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

(PECL sam >= 1.1.0) Turn on or off additional debugging output.

(PECL svn >= 0.2.0) Return true if the path points to a file, false otherwise