posix_setegid
(PHP 4 >= 4.0.2, PHP 5)
posix_setegid --
Set the effective GID of the current process
Description
bool
posix_setegid ( int gid )
Set the effective group 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.
如果成功则返回 TRUE，失败则返回 FALSE。