Quote 2.0 is a plugin for Movable Type 4.0 that easily allows commentators to quote a previous comment. There is an unreleased, older version that works with MT 3.
The second option would be to embed in the static file the original comment text as well as the rendered HTML. However, this will cause archive pages to become bloated with quotable text that will never be used. Other options, like limiting quotability to the last dozen comments, limit usability.
To install extract the distribution in your plugins directory e.g.
cd /usr/local/www/cgi-bin/mt/plugins && tar xvzf ~/quote-2.0.tar.gz
Finally edit your Comment Detail template and add the <$MTQuoteLink$> tag in an appropriate place, like after the permalink hyperlink.
Rebuild your site and you are ready to go.
Currently, these tags do not support the PHP interface. I don’t know PHP, but will include corresponding code if someone wants to write it.
MTQuoteLink: argument ‘inner’ allows you to specify the hyperlinked text or other html, e.g.
It defaults to ‘Quote Comment’.
Quote comes with a built-in template for the quote text:
<blockquote> <strong><$MTCommentAuthor$>:</strong> <$MTCommentBody autolink="0" sanitize="0" convert_breaks="0"$> </blockquote>
This template can be overridden by specifying a module template called “Quote Comment”. You can change the name of the template that Quote looks for by specifying a ‘QuoteTemplate’ option in mt-config.cgi.
If you are like me and run two blogs on different domains with the MT install being on a third domain, then you need to make sure that the cgi scripts (or at least mt-comments.cgi) can be accessed via each domain on which you want to use Quote. This can be done by setting up aliases or symlinks on the blog domains to the cgi-bin directory of the MT-running domain. This issue occurs because the plugin uses AJAX/JSON to transmit information and browser security settings require backend to be on the same domain as the blog using it.
If you fine that the quote is taking too long to load, try running your blog under FastCGI.