# posix_getegid

(PHP 4, PHP 5, PHP 7)

posix_getegid — Return the effective group ID of the current process

### 说明

posix_getegid ( void ) : int

Return the numeric effective group ID of the current process.

### 返回值

Returns an integer of the effective group ID.

### 范例

Example #1 posix_getegid() example

This example will print out the effective group id, once it is changed with posix_setegid().

    <?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
    ?>

### 注释

posix_getegid() is different than posix_getgid() because effective group ID can be changed by a calling process using posix_setegid().

### 参见

- posix_getgrgid() - Return info about a group by group id
- posix_getgid() - Return the real group ID of the current process
- posix_setgid() - Set the GID of the current process