Predefined Constants
posix_access
POSIX
PHP Manual

# POSIX Functions

# See Also

The section about Process Control Functions maybe of interest for you.

## Table of Contents

- posix_access — Determine accessibility of a file
- posix_ctermid — Get path name of controlling terminal
- posix_get_last_error — Retrieve the error number set by the last posix function that failed
- posix_getcwd — Pathname of current directory
- posix_getegid — Return the effective group ID of the current process
- posix_geteuid — Return the effective user ID of the current process
- posix_getgid — Return the real group ID of the current process
- posix_getgrgid — Return info about a group by group id
- posix_getgrnam — Return info about a group by name
- posix_getgroups — Return the group set of the current process
- posix_getlogin — Return login name
- posix_getpgid — Get process group id for job control
- posix_getpgrp — Return the current process group identifier
- posix_getpid — Return the current process identifier
- posix_getppid — Return the parent process identifier
- posix_getpwnam — Return info about a user by username
- posix_getpwuid — Return info about a user by user id
- posix_getrlimit — Return info about system resource limits
- posix_getsid — Get the current sid of the process
- posix_getuid — Return the real user ID of the current process
- posix_initgroups — Calculate the group access list
- posix_isatty — Determine if a file descriptor is an interactive terminal
- posix_kill — Send a signal to a process
- posix_mkfifo — Create a fifo special file (a named pipe)
- posix_mknod — Create a special or ordinary file (POSIX.1)
- posix_setegid — Set the effective GID of the current process
- posix_seteuid — Set the effective UID of the current process
- posix_setgid — Set the GID of the current process
- posix_setpgid — Set process group id for job control
- posix_setsid — Make the current process a session leader
- posix_setuid — Set the UID of the current process
- posix_strerror — Retrieve the system error message associated with the given errno
- posix_times — Get process times
- posix_ttyname — Determine terminal device name
- posix_uname — Get system name

Predefined Constants
posix_access
POSIX
PHP Manual