Include the file version information in the text file controlled by CVS

After using Mantis, I decided to use CVS to control Mantis modifications. When I checked out the PHP code, I found this information:

......
#-------------------------------------------------
# $ Revision: 1.2 $
# $ Author: CVSUser $
# $ Date: 2004/03/14 15:17:18 $
#
# $ Id: strings_chinese_simplified.txt, v 1.2 2004/03/14 15:17:18 CVSUser Exp $
......

After each modification is submitted, it will automatically change. Some instructions are found on the Internet. The following content is taken from ChinaUnix.

CVS replaces the file with a keyword (macro) by default. Adding these keywords to the file is a good work habit.
$ Id $ keyword is replaced by the file name, version, time, author, and code nature. If you use the-l option to retrieve the keyword, the name of the logon user will be added after Exp. In addition to the $ Id $ keyword, the following common keywords are also supported:

$ Log $: the modified Log information you provided.
$ Author $: Author of the version.
$ Locker $: Locker of this version
$ State $: the Status Exp (trial version), Stabe (stable version), and Rel (release version) of this version. The default value is Exp.
$ Date $: the time when the version is saved, in UTC time format.
$ Revision $: Version Number of this version
$ RCSfile $: RFM file name
$ Source $: full path name of the RCS
$ Name $: retrieve the symbolic Name of this version.
$ Header $: equivalent to $ Source $ Revision $ Date $ Author $ State $ Locker $ combination

Conclusion: CVS inserts the result before the last $ symbol of the macro when performing macro replacement. For example, $ Revision: $ is replaced with $ Revision: 1.5 $.

In some cases, it should be a good function, but it cannot be abused. Otherwise, it may affect document generation.