posix_setegid

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

posix_setegid — Set the effective GID of the current process

说明

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.

参数

group_id

The group id.

返回值

成功时返回 true， 或者在失败时返回 false。

范例

示例 #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
?>

参见