(PHP 4 >= 4.0.2, PHP 5)
posix_seteuid — Set the effective UID of the current process
Set the real user 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 user id.
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.