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

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

(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 info about a user by user id

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

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

(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 7) Set system resource limits bool posix_setrlimit