(PECL ev >= 0.2.0) Constructs EvPeriodic watcher object

(PECL pthreads >= 2.0.0) Collect references to completed tasks

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Convert a pathname and a project identifier to a System V IPC key

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Returns information from the message queue data structure

(PHP 5 >= 5.3.0, PHP 7) Waits for signals

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

(PHP 4, PHP 5, PHP 7) Get process times array

(PECL ev >= 0.2.0) Suspend the loop public

(PHP 4, PHP 5, PHP 7) Return info about a group by name

(PECL eio >= 0.0.1dev) Returns number of finished, but unhandled requests