* @param string $file Path to the file.
* @param int $mode Optional. The permissions as octal number, usually 0644 for files, 0755 for dirs.
* @param bool $recursive Optional. If set True changes file group recursively. Defaults to False.
* @param string $file Path to the file.
* @param int $mode Optional. The permissions as octal number, usually 0644 for files, 0755 for dirs.
* @param bool $recursive Optional. If set True changes file group recursively. Defaults to False.