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# filegroup

(PHP 3, PHP 4 , PHP 5)

filegroup -- Gets file group

## Description

int filegroup ( string filename)

Returns the group ID of the file, or `FALSE` in case of an error. The group ID is returned in numerical format, use posix_getgrgid() to resolve it to a group name. Upon failure, `FALSE` is returned along with an error of level `E_WARNING`.

> 備注:此函數的結果會被快取。詳細資訊請參考 clearstatcache()。

> 心得:As of PHP 5.0.0 this function can also be used with some URL wrappers. Refer to 附錄 L for a listing of which wrappers support stat() family of functionality.

See also fileowner(), and safe_mode_gid.

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