(PECL eio >= 0.0.1dev) Returns number of threads currently in use

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

(PECL eio >= 0.0.1dev) Change file last access and modification times.

(PECL ev >= 0.2.0) Returns recursion depth

(PECL ev >= 0.2.0) Suspend the loop public

(PECL pthreads >= 2.0.0) Create a Condition

(PHP 5 >= 5.3.0, PHP 7) Calls signal handlers for pending signals

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Set information in the message queue data structure

(PECL expect >= 0.1.0) Execute command via Bourne shell, and open the PTY stream to the process

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