(PHP 4, PHP 5, PHP 7) Creates or open a shared memory segment

(PECL sync >= 1.0.0) Constructs a new SyncMutex object

(PECL ev >= 0.2.0) Constructs EvPeriodic watcher object

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

(PECL eio >= 0.0.1dev) Change file/direcrory permissions.

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

(PECL ev >= 0.2.0) Create instance of a stopped EvCheck watcher

(PHP 4, PHP 5, PHP 7) Return info about system resource limits