PHP. Руководство по PHP. 2005
posix_setuid
posix_setuid
(PHP3>= 3.0.13, PHP4, PHP5)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.
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
See also
posix_setsid
posix_strerror