posix_setgid

(PHP 3 >= 3.0.13, PHP 4, PHP 5)

posix_setgid -- Set the GID of the current process

Description

bool posix_setgid ( int gid )

Set the real group ID of the current process. This is a privileged function and you need appropriate privileges (usually root) on your system to be able to perform this function. The appropriate order of function calls is posix_setgid() first, posix_setuid() last.

Note: If the caller is a super user, this will also set your effective group id

Parameters

gid

The group id.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 1. posix_setgid() example

This example will print out your effective group id, once you change it.

#!/usr/local/bin/php
<?php
echo 'My real group id is '.posix_getgid(); //20
posix_setgid(40);
echo
'My real group id is '.posix_getgid(); //40
echo 'My effective group id is '.posix_getegid(); //40
?>

See Also

posix_getgrgid() for information on how to convert this into a useable group name
posix_getgid() get real group id.