Tìm Hiểu về Wordpress - part 30 ppsx

• Challenge http://digwp.com/u/100 CAPTCHA-based anti-spam plugin that provides a variety of challenge questions that the user must answer correctly before comment submission.. • Commen

• JSSpamBlock http://digwp.com/u/197

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 http://digwp.com/u/98

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 http://digwp.com/u/99

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 http://digwp.com/u/100

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 http://digwp.com/u/101

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 http://digwp.com/u/102

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 http://digwp.com/u/103

CAPTCHA-based anti-spam plugin that includes its own configuration options

• Simple Trackback Validation http://digwp.com/u/104

Simple Trackback Validation provides solid protection against trackback spam If

• Referrer Bouncer http://digwp.com/u/105 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 http://digwp.com/u/106 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? http://digwp.com/u/107 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 http://digwp.com/u/108 Comment Spam Trap employs two different filtering methods for stopping comment spam Simple yet effective

• Spam Free http://digwp.com/u/109 Spam Free is a powerful anti-spam plugin that virtually eliminates automated comment spam Recommended

• Cookies for Comments http://digwp.com/u/110 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

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 http://digwp.com/u/198

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 http://digwp.com/u/199

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 http://digwp.com/u/200

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

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="http://domain.tld/" 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 + Nofollow

Confused about Google’s new

nofollow policy? Here are

some great sources for more

information:

http://digwp.com/u/201

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 http://digwp.com/u/205

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 http://digwp.com/u/206

Lucia’s Linky Love provides the greatest amount of control over SEO-related

Dofollow Plugin Library

For a complete review of all currently available WordPress dofollow plugins, check out Perishable Press:

http://digwp.com/u/204

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 http://digwp.com/u/207 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 http://digwp.com/u/208 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 http://digwp.com/u/209 Short and sweet: Tweet-This buttons on every post Perfect for sharing your

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 http://digwp.com/u/211

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 http://digwp.com/u/212

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 http://digwp.com/u/213

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 http://digwp.com/u/214

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 http://digwp.com/u/215

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 http://digwp.com/u/216

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 http://digwp.com/u/217

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.

http://digwp.com/u/469

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

I don’t know the key to success, but the key to failure is trying to please everybody.

– B I L L C O S B Y