Tìm Hiểu về Wordpress - part 30 ppsx

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• JSSpamBlock
JavaScript-based anti-spam plugin. Uses JavaScript to filter out spam quietly and
discretely. Users without JavaScript must prove their legitimacy via numerical
CAPTCHA exercise.
• bcSpamBlock
Another good JavaScript-based anti-spam plugin that uses JavaScript to filter
out spam quietly and discretely. Users without JavaScript must prove their
legitimacy via copy-&-paste CAPTCHA exercise.
• reCAPTCHA Plugin
Displays words from old books that users must correctly interpret. Uses the
popular reCAPTCHA service that is used on popular sites such as Twitter,
Facebook, and StumbleUpon. Upside: use of this service helps to digitize old
books. Downside: requires a key to work.
• Challenge
CAPTCHA-based anti-spam plugin that provides a variety of challenge questions
that the user must answer correctly before comment submission. Bonus:
includes Admin Options page.
• Comment Spam Stopper
CAPTCHA-based anti-spam plugin that also contains JavaScript validation to
ensure that required fields in the comment form have been populated with
data.
• WP-HashCash
CAPTCHA-based anti-spam plugin that claims to be 100% effective. JavaScript is
required to generate a secret number that is verified by the plugin script.
• Word Verify
CAPTCHA-based anti-spam plugin that includes its own configuration options.
• Simple Trackback Validation
Simple Trackback Validation provides solid protection against trackback spam. If
your site suffers from relentless rounds of trackback spam, this plugin is for you.
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• Referrer Bouncer
Referrer Bouncer provides powerful protection against referrer spam. Easy to
use and requires no configuration. If referrer spam has got you down, check out
this plugin.
• ProtectWebForm Captcha
CAPTCHA-based anti-spam plugin designed with usability in mind. Provides a
way for users to refresh the CAPTCHA or even listen to a recorded version. Also
enables users to customize the CAPTCHA image.
• Did You Pass Math?
CAPTCHA-based anti-spam plugin that requires the user to successfully solve a
random math problem. We’re talking simple math here – no algebra required.
• Comment Spam Trap
Comment Spam Trap employs two different filtering methods for stopping
comment spam. Simple yet effective.
• Spam Free
Spam Free is a powerful anti-spam plugin that virtually eliminates automated
comment spam. Recommended.
• Cookies for Comments
Uses a cookie-method to drastically reduce the amount of spam that makes it
through to your site. Very effective.
7.7.1 Other Considerations & Techniques
Clearly, the WordPress comments area is one of the most highly configurable and
flexible parts of the entire application. To round out the chapter, here are a few
more considerations that will help you maximize your comments area to its
fullest potential.
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7.7.2 Enhancing and Encouraging Comments
As we have seen, there are many ways to enhance and encourage comments on
WordPress-powered sites. In addition to the numerous methods covered so far,
there are also many ways to advance comment functionality using plugins. With

WordPress, there is a plugin for just about anything and everything, and the
comment area is no exception. In this section, we present some of the most useful
and beneficial plugins for enhancing and encouraging comments on your site.
• @ Reply
This plugin automates the process of replying to comments using the “@
commentator” convention. Instead of manually typing the “@commentator” for
each reply, simply click on the “Reply” link of the original comment and the @
Reply plugin will automagically include a “@commentator” link in your comment’s
textarea. This facilitates the process of replying to other comments, encourages
readers to participate in the conversation, and enhances the usability of your
comments area.
• Keyword Luv
The Keyword Luv plugin rewards your commentators by separating their name
from their keywords in their website link. This enables commentators to leave their
name without sacrificing the keywords they want for the link to their website.
From an SEO perspective, more focused and relevant anchor text benefits their site
and thus encourages additional comments.
• CommentLuv
CommentLuv creates a titled link to the commentator’s most recent post. This
encourages comments by giving commentators a general site link and a more
specifically targeted post link. CommentLuv also enables click-tracking and provides
statistics at commentluv.com.
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7.7.3 “nofollow” Links
In January of 2005, Google began pushing a new “nofollow” attribute for anchor
elements. Soon thereafter, MSN and Yahoo!, along with other lesser search
companies, also began support for the new nofollow attribute. The nofollow
attribute is utilized as follows:
<a href=" title="Example of a nofollow link"
rel="nofollow">This is a nofollow link</a>

Links including the nofollow attribute are flagged by supportive search engines
as not being endorsed by the site owner and/or author of the page content. The
search engines then proceed to treat the link as follows:
• nofollow links will not be followed through to the next page
• nofollow links will not be included in the calculation of page rank (Google
recently announced that they do include nofollow links when determining PR)
• nofollow links will not include the anchor text in determining the linked page’s
relevant keywords
Basically, a nofollow link will be ignored by MSN/Bing and Yahoo!, and partially
ignored by Google. Many SEO-savvy people selectively employ nofollow attributes
to influence the flow of link equity throughout their site. An extreme example
of this is seen when sites decide to hoard page rank by not sharing it with other
websites. By “nofollowing” all links that point to external sites, such sites retain the
flow of link juice within their own domain and theoretically improve the value of
their own pages.
Unfortunately for many SEOs, this strategy no longer works as it once did with
Google, whose policy is now such that link equity not transferred through nofollow
links is no longer redistributed to the source page. Nofollow remains a useful tool,
but it is no longer effective for conserving page rank with the world’s biggest
search engine.
Google + Nofollow
Confused about Google’s new
nofollow policy? Here are
some great sources for more
information:


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In any case, not too long after nofollow was established, the WordPress
development team decided to implement the nofollow attribute into the

comments display area. By adding nofollow attributes to every link in the
comments area, WordPress was heeding Google’s recommendation that nofollow
attributes should be included on any publicly placed links. Thus, every comment-
related link is now a nofollow link; this includes author links, pingbacks,
trackbacks, and even links within comments themselves.
Unfortunately, not everyone is thrilled about the idea of nofollow. In fact, four
years after the creation of the nofollow attribute, an uprising of “dofollow”
bloggers and supporters has grown into a full-fledged movement. The central
idea behind the dofollow movement is that commentators deserve credit for the
links they use when taking the time to comment on your site. By slapping your
commentators’ links with nofollow attributes, you remove incentive and diminish
the reward of commenting on your site. Or so the argument goes. You know, “it’s
like, be cool man, and share the link love with your fellow bloggers.”
So, if you find yourself agreeing with the dofollow blogging movement and think
that punishing commentators with nofollow links is just plain wrong, then you
will definitely want to remove the nofollow attributes that WordPress places on
comment links. Fortunately, there are plenty of great plugins to help you do this.
Here are a few of the best:
• DoFollow
One of the first WordPress dofollow plugins, DoFollow has evolved into a highly
flexible method for nofollow removal. The admin option page is clear, simple,
and provides granular control over all options. This plugin is ideal for users of all
experience levels and provides control over many important aspects of dofollow
strategy. Excellent for distinguishing between comment links, trackbacks, and
pingbacks. Highly recommended.
• Lucia’s Linky Love Plugin
Lucia’s Linky Love provides the greatest amount of control over SEO-related
aspects of the nofollow-removal process. Although the admin options page may
prove confusing for novice users, those familiar with basic principles of SEO will
Dofollow Plugin Library

For a complete review of all
currently available WordPress
dofollow plugins, check out
Perishable Press:
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find everything they need to control the flow of comment link love throughout
their site. If you are looking for a versatile, customizable dofollow plugin,
Lucia’s Linky Love is one of the best.
• NoFollow Free
NoFollow Free provides many options currently unavailable anywhere else.
Beyond the ability to display the number of comments for each author, require
a minimum number of comments for nofollow-removal, and specify which
types of comments to follow, NoFollow Free also features a customizable
nofollow blacklist for spam words. Plus, NoFollow Free throws in an optional
“NoFollow Free” image band just to seal the deal. Overall, NoFollow Free is
a comprehensive solution that provides robust functionality for the effective
implementation of your nofollow-removal strategy. Five Stars.
7.7.4 Integrating Twitter
Last but not least, we want to look at some of the many ways to integrate
everybody’s favorite new microblogging service, Twitter! We love to Twitter almost
as much as we love to create beautiful, modern sites with WordPress. And so
naturally we are thrilled to have such a wonderful variety of plugins enabling us to
combine the two. Let’s have a look at some of the best…
• TweetSuite
The TweetSuite plugin integrates Twitter with a host of useful tools, including
everything from server-side TweetBacks and automatic post tweets to Tweet-
This buttons and widget functionality. Recommended for serious Twitter fans
who love WordPress.
• Tweet This
Short and sweet: Tweet-This buttons on every post. Perfect for sharing your

posts on Twitter.
• WP Twitip ID
This plugin makes it possible for users to add their Twitter name along with
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the usual comment information, such as name and URL. This provides incentive
for readers to comment while enhancing the personalization of the comment
display area.
• TwiBadge
TwiBadge makes it easy to display your Twitter badge, which includes your
latest tweets, subscriber count, and more. The badge supports both widgetized
and non-widgetized themes, and is equipped with shortcode for easy insertion.
• The Twitter Updater
The Twitter Updater automatically sends tweets to your Twitter account every
time you publish or edit one of your posts. Includes Admin panel that enables
you to customize the tweets and disable either type of post update.
• TwitThis
TwitThis makes it easy for readers to share your posts on Twitter by clicking on
the automatically generated “TwitThis” links for each post. Before the URL of
your post is sent to Twitter, it is shortened via URL-shortening service, TinyURL.
• Twitter Tools
Twitter Tools boasts “complete integration” between WordPress and Twitter,
enabling you to tweet blogs, blog tweets, and much more. Full Admin options
makes it easy to customize.
• Twitter Wordpress Sidebar Widget
This plugin makes it easy to share your Twitter updates in your sidebar. Each
status update is linked, and there are several great customization options.
• Twitter Feed
Uses the Twitterfeed service (requires OpenID account) and your site’s RSS feed
to automatically post your blog updates to your Twitter account.
• Twitt-Twoo

Ever wanted to update your Twitter status from your sidebar? You’re not alone.
The Twitt-Twoo plugin makes this possible using the magical powers of Ajax.
Stupid Twitter Tricks
There’s nothing stupid about
the awesome collection of
custom Twitter tricks now
available at Perishable Press:
/>@Anywhere
Twitter has a JavaScript
library for integrating Twitter
features into other websites. It's
a little more involved than a
plugin but the possibilities are
very cool, like making
@usernames automatically
pop up "cards" with that
users information and a
follow button.
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And so…
In this action-packed chapter, we have explored the WordPress comment system in
considerable depth. With such incredible flexibility, amazing customizations, and
awesome plugins available to you, transforming your WordPress Comments Area
into a beautiful, well-optimized, user-friendly response system is at your fingertips.
Of course, the greatest comment system in the world is of no use if nobody
can find your site. In the next chapter, we dig into the fine art of search-engine
optimization and explore many useful and effective techniques for doing well in
the search engines.
Chris’ personal blog (next page) uses some art
direction to apply styling appropriate to the content

of individual Posts.
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I don’t know the key to success,
but the key to failure is trying to
please everybody.
– BILL COSBY