(PECL ev >= 0.2.0) Block the process for the given number of seconds.

(PECL ev >= 0.2.0) Creates EvCheck object associated with the current event loop instance

(PECL ev >= 0.2.0) Creates EvTimer stopped watcher object

(PHP 4, PHP 5, PHP 7) Removes a variable from shared memory

(PECL libevent >= 0.0.1) Assign a priority to a buffered event

(PECL eio >= 0.0.1dev) Set group limit void

(PHP 5 >= 5.3.0, PHP 7) Calls signal handlers for pending signals

(PECL ev >= 0.2.0) Returns the set of backends supported by current libev configuration.

(PHP 5 >= 5.3.0, PHP 7) Check whether a message queue exists

(PECL sync >= 1.0.0) Fires/sets the event