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.

Returns TRUE on success or FALSE on failure.