# SplFileInfo::getGroup

(PHP 5 >= 5.1.2, PHP 7, PHP 8)

SplFileInfo::getGroup — Gets the file group

### 说明

public SplFileInfo::getGroup(): int|false

Gets the file group. The group ID is returned in numerical format.

### 参数

此函数没有参数。

### 返回值

The group id in numerical format on success, or `false` on failure.

### 错误／异常

Throws RuntimeException on error.

### 示例

示例 #1 SplFileInfo::getGroup() example

`<?php
$info = new SplFileInfo('example.jpg');
echo info->getFilename() . ' belongs to group id ' . $info->getGroup() . "\n";
print_r(posix_getgrgid($info->getGroup()));
?>`

以上示例的输出类似于：

    example.jpg belongs to group id 42
    Array
    (
        [name] => toons
        [passwd] => x
        [members] => Array
            (
                [0] => tom
                [1] => jerry
            )
        [gid] => 42
    )

### 参见

- filegroup() - 取得文件的组
- posix_getgrgid() - Return info about a group by group id

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