Set the real group ID of the current process. This is a
privileged function and needs appropriate privileges (usually
root) on the 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 the 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 the effective group id, once it is changed.
<?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_seteuid
