# posix_getpgid

(PHP 4, PHP 5, PHP 7)

posix_getpgid — Get process group id for job control

### 说明

posix_getpgid ( int `$pid` ) : int

Returns the process group identifier of the process `pid` 或者在失败时返回 `FALSE`.

### 参数

`pid`

  The process id.

### 返回值

Returns the identifier, as an integer.

### 范例

Example #1 Example use of posix_getpgid()

    <?php
    $pid = posix_getppid();
    echo posix_getpgid($pid); //35
    ?>

### 注释

> Note:

> This is a not POSIX function, but is common on BSD and System V systems. If the system does not support this function, then it will not be included at compile time. This may be checked with function_exists().

### 参见

- posix_getppid() - Return the parent process identifier
- man page SETPGID(2)