# posix_getgid

(PHP 4, PHP 5, PHP 7)

posix_getgid — Return the real group ID of the current process

### 说明

posix_getgid ( void ) : int

Return the numeric real group ID of the current process.

### 返回值

Returns the real group id, as an integer.

### 范例

Example #1 posix_getgid() example

This example will print out the real group id, even once the effective group id has been changed.

    <?php
    echo 'My real group id is '.posix_getgid(); //20
    posix_setegid(40);
    echo 'My real group id is '.posix_getgid(); //20
    echo 'My effective group id is '.posix_getegid(); //40
    ?>

### 参见

- posix_getgrgid() - Return info about a group by group id
- posix_getegid() - Return the effective group ID of the current process
- posix_setgid() - Set the GID of the current process
- POSIX man page GETGID(2)