(PECL eio >= 0.0.1dev) Create a special or ordinary file.

(PECL pthreads >= 2.0.0) Manipulation public

(PECL eio >= 0.0.1dev) Write to file resource

(PECL libevent >= 0.0.2) Alias of

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

(PECL libevent >= 0.0.1) Write data to a buffered event

(PECL eio >= 0.0.1dev) Calls Linux' syncfs syscall, if available

(PECL pthreads >= 2.0.0) Release Mutex final

(PECL ev >= 0.2.0) Establishes the current time by querying the kernel, updating the time returned by EvLoop::now

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