posix_setuid

(PHP 4, PHP 5, PHP 7, PHP 8)

posix_setuid — Set the UID of the current process

说明

posix_setuid ( int $user_id ) : bool

Set the real user ID of the current process. This is a privileged function that needs appropriate privileges (usually root) on the system to be able to perform this function.

参数

user_id

The user 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_setuid() example

This example will show the current user id and then set it to a different value.

<?php
echo posix_getuid()."\n"; //10001
echo posix_geteuid()."\n"; //10001
posix_setuid(10000);
echo posix_getuid()."\n"; //10000
echo posix_geteuid()."\n"; //10000
?>

参见