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<posix_pathconfposix_seteuid>
^POSIX FunctionsLast updated: Mon, 26 Oct 2026

posix_setegid

(PHP 4 >= 4.0.2, PHP 5, PHP 7, PHP 8)

posix_setegid — Set the effective GID of the current process

Description

function posix_setegid(int $group_id): bool

Set the effective 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.

Parameters

group_id

The group id.

Return Values

Returns true on success or false on failure.

Examples

Example #1 posix_setegid() example

This example will print out the effective group id, once changed. 

<?php
echo 'My real group id is '.posix_getgid(); //20
posix_setegid(40);
echo 'My real group id is '.posix_getgid(); //20
echo 'My effective group id is '.posix_getegid(); //40
?>

See Also


<posix_pathconfposix_seteuid>
^POSIX FunctionsLast updated: Mon, 26 Oct 2026