(PHP 5, PHP 7) Get the priority of any process

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Set an alarm clock for delivery of a signal

(PHP 5, PHP 7) Waits on or returns the status of a forked child

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Waits on or returns the status of a forked child

(PHP 5 >= 5.3.4, PHP 7) Alias of

(PHP 5 >= 5.3.4, PHP 7) Retrieve the error number set by the last pcntl function which failed

(PHP 5 >= 5.3.4, PHP 7) Retrieve the system error message associated with the given errno

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Executes specified program in current process space

(PHP 5 >= 5.3.0, PHP 7) Sets and retrieves blocked signals

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