posix_setuid
(PHP 3 >= 3.0.13, PHP 4, PHP 5)
posix_setuid -- Set the UID of the current process
说明
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.
返回值
如果成功则返回 TRUE，失败则返回 FALSE。