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

(PHP 4, PHP 5, PHP 7) Return the current process identifier

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

(PHP 4, PHP 5, PHP 7) Get process times array

(PHP 4, PHP 5, PHP 7) Return info about a user by username

(PHP 4, PHP 5, PHP 7) Return login name string

(PHP 4, PHP 5, PHP 7) Determine if a file descriptor is an interactive terminal

(PHP 4, PHP 5, PHP 7) Return the current process group identifier

(PHP 4, PHP 5, PHP 7) Set the UID of the current process

(PHP 4, PHP 5, PHP 7) Return the parent process identifier