(PECL rar >= 2.0.0)
rar_comment_get — Get comment text from the RAR archive.
Get the comment stored in the RAR archive. It may be up to 64 KiB long.
Returns the comment or NULL if there is none.
注意: Rar has currently no support for unicode comments. The encoding of the result of this function is not specified, but it will probably be Windows-1252.