(PHP 4, PHP 5, PHP 7) Get path name of controlling terminal

(PECL eio >= 0.0.1dev) Truncate a file resource

(PECL ev >= 0.2.0) Begin checking for events and calling callbacks for the default loop

(PECL libevent >= 0.0.1) Abort event loop

(PECL ev >= 0.2.0) Returns an integer describing the backend used by libev.

(PHP 5 >= 5.3.4, PHP 7) Retrieve the system error message associated with the given errno

(PECL ev >= 0.2.0) Return the number of times the default event loop has polled for new events.

(PECL libevent >= 0.0.1) Handle events int

(PHP 4, PHP 5, PHP 7) Execute an external program

(PECL libevent >= 0.0.2) Alias of