posix_setgid

(PHP 4, PHP 5, PHP 7)

posix_setgid — Set the GID of the current process

Description

posix_setgid ( int $gid ) : 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

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

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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.posix-setgid.php