Updated version for API v1.1
Following on the idea from this post, sometimes a full-blown Twitter plugin is too much. Luckily Twitter has a rich API that is ripe for the taking of information. The API console is of great use to find how to properly format the API requests. This code below will output the number of followers specified by the username passed to the function wrapped in a link to the page that allows the visitor to easily follow the user.

By Seguidores de Twitter en Wordpress – Desarrollo Digital – Blog July 17, 2012 - 8:32 am
[...] Fuente: http://clark-technet.com/2012/04/simple-wordpress-twitter-follower-count-snippet [...]
By Ian July 18, 2012 - 5:22 pm
Hey, this is an awesome tutorial. Thanks! How would I go about adding this function to a shortcode?
By Jeremy Clark July 19, 2012 - 9:55 am
You can just add a function like this.
add_shortcode( 'twitter', 'twitter_followers_cb' );function twitter_followers_cb( $atts) {
extract( shortcode_atts( array(
'user' => ''
), $atts ) );
return twitter_followers($user);
}
Then you just use [twitter user="twitterusername"] in your widget or content. Just replace twitterusername with your username. I’ve also edited the source code to show this example as well.