(PECL eio >= 0.0.1dev) Create a hardlink for file

(PECL ev >= 0.2.0) Configures the watcher

(PHP 4, PHP 5, PHP 7) Removes shared memory from Unix systems

(PHP 4, PHP 5, PHP 7) Acquire a semaphore bool

(PECL sync >= 1.0.0) Releases a read lock

(PECL ev >= 0.2.0) Resume previously suspended default event loop

(PHP 4, PHP 5, PHP 7) Make the current process a session leader

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Returns the signal which caused the child to terminate

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

(PECL ev >= 0.2.0) Constructs EvIo watcher object