(PECL eio >= 0.0.1dev) Get file system statistics

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Execute a command and open file pointers for input/output

(PECL pthreads >= 2.0.8) Mark an object as garbage

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

(PECL ev >= 0.2.0) Returns the time when the last iteration of the default event loop has started.

(PECL sync >= 1.0.0) Releases a write lock

(PECL sync >= 1.0.0) Unlocks the mutex public

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

(PECL ev >= 0.2.0) Feed a signal event info Ev

(PECL libevent >= 0.0.1) Exit loop after a time