posix_setgid
PHP function
Edit on GitHub ✎
(PHP 4, PHP 5, PHP 7, PHP 8)
Set the GID of the current process
Description
posix_setgid(int $group_id): bool
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
group_idThe group id.
Return Values
Success
Examples
posix_setgid() example
This example will print out the effective group id, once it is changed.
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
?>