posix_setuid

(PHP 3 >= 3.0.13, PHP 4, PHP 5)

posix_setuid -- Set the UID of the current process

Description

bool posix_setuid ( int uid )

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

若果成功則返回 TRUE，失敗則返回 FALSE。