I love WordPress built-in RSS feed, but I know some of you might not require this WordPress built-in RSS feed and thinking want to disable it from your blog or website, then you can follow the below steps by adding some simple code to your functions.php file, that’s all!

function digwp_disable_feed() {
	wp_die(__('<h1>Feed not available, please visit our <a href="'.get_bloginfo('url').'">Home Page</a>!</h1>'));
}
add_action('do_feed',      'digwp_disable_feed', 1);
add_action('do_feed_rdf',  'digwp_disable_feed', 1);
add_action('do_feed_rss',  'digwp_disable_feed', 1);
add_action('do_feed_rss2', 'digwp_disable_feed', 1);
add_action('do_feed_atom', 'digwp_disable_feed', 1);

Thanks Jeff Starr shows us how to disable WordPress built-in RSS feed.

WordPress doesn’t automatically add a rel=”nofollow” attribute to all the external links, but if you want to add a rel=”nofollow” attribute link to all external links, you can do it by copy and paste the following coding to the functions.php file.

add_filter('the_content', 'auto_nofollow');

function auto_nofollow($content) {
    //return stripslashes(wp_rel_nofollow($content));

    return preg_replace_callback('/<a>]+/', 'auto_nofollow_callback', $content);
}

function auto_nofollow_callback($matches) {
    $link = $matches[0];
    $site_link = get_bloginfo('url');

    if (strpos($link, 'rel') === false) {
        $link = preg_replace("%(href=S(?!$site_link))%i", 'rel="nofollow" $1', $link);
    } elseif (preg_match("%href=S(?!$site_link)%i", $link)) {
        $link = preg_replace('/rel=S(?!nofollow)S*/i', 'rel="nofollow"', $link);
    }
    return $link;
}

Thanks to One Extra Pixel for the great code!

Some people like to leave their comments on your post with website url, I think most probably they want to get link juice from your comments. If you want to remove url field from WordPress comment form, perhaps you can paste the below code to your functions.php file. Once it is saved, the url field will be automatically removed from your comment form.

function remove_comment_fields($fields) {
    unset($fields['url']);
    return $fields;
}
add_filter('comment_form_default_fields','remove_comment_fields');

Thanks for WP Tuts for the great code!

I was thinking to create a new website for web design and I think Free wordPress Theme named Simple Grid is suit to my requirement. I can showcase my portfolio in the main page to show to my visitors or customers. You can go through the theme features as below:

Menus…
Responsive Theme
For Menus Name use: header_menu
For Category Name use: category_menu

Valid XHTML + CSS
WordPress 3.3+ Compatible
Search Engine Optimized
Safari Compatible
Firefox Compatible
IE9 Compatible
Support and Updates
Theme Video Overview

Theme Options
Menus Capability
Widgets

If you love this love, look at their demo here and click the download link to download it. I hope you like this free WordPress Theme

If you have twitter account and want to display latest tweets on your blog, some people will using plugin to display the latest tweets, but you also can use the following code to display latest tweets without using any plugin.

Simply paste the following code anywhere in your theme files, where you want the tweets to be displayed.
Don’t forget to update the code with your username on line 3. Max items to display can be defined on line 4.

<?php
include_once(ABSPATH . WPINC . '/feed.php');
$rss = fetch_feed('https://api.twitter.com/1/statuses/user_timeline.rss?screen_name=catswhocode');
$maxitems = $rss->get_item_quantity(3);
$rss_items = $rss->get_items(0, $maxitems);
?>

<ul>
<?php if ($maxitems == 0) echo '<li>No items.</li>';
else
// Loop through each feed item and display each item as a hyperlink.
foreach ( $rss_items as $item ) : ?>
<li>
<a href='<?php echo $item->get_permalink(); ?>'>
<?php echo $item->get_title(); ?>
</a>
</li>
<?php endforeach; ?>
</ul>

Thanks to Smashing Magazine for this great code!