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# posix_setgid

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

posix_setgid -- Set the GID of the current process

## Description

bool posix_setgid ( int gid)

Set the real 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. The appropriate order of function calls is posix_setgid() first, posix_setuid() last.

成功回傳`TRUE`失敗回傳`FALSE`。

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