I have created this plugin for wordpress because I wanted to create links in my del.icio.us bookmarks to my own blog posts.

This plugin triggers when I create a blog post and creates a bookmark to the new post using my del.icio.us account.

To use this plugin, you need to have a Wordpress-based blog and a del.icio.us account.

<?php
/*
 * Plugin Name: del.icio.us API Client
 * Plugin URI: http://soerenlarsen.dk/
 * Description: published posts to del.icio.us, uses cURL library!
 * Version: 0.2
 * Author: slamidtfyn
 * Author URI: http://soerenlarsen.dk/
 */

$user   =       "foo";
$pass   =       "bar";

function addto_delicious($post_ID)
{
    // Get tags
    foreach ((get_the_category()) as $cat) {
        $tags.= $cat->cat_name . ' ';
    }

    // Get url
    $url = get_permalink($post_ID);

    //get description
    $description = the_title('', '', false);

    // This is the current api url, can be changed by del.icio.us!
    $api_url = "https://api.del.icio.us/v1/posts/add";

    //this is the data to create a new post
    $post_data = "url=".urlencode($url)."&description=".$description.
                 "&tags=".$tags."&shared=yes&replace=yes";

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$api_url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
    curl_setopt($ch, CURLOPT_USERAGENT, 'soerenlarsen.dk');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_USERPWD,"$user:$pass");
    curl_setopt($ch, CURLOPT_POST, 1 );
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
    $xml = curl_exec ($ch);
    curl_close ($ch);
}

add_action('publish_post', 'addto_delicious');
?>

I will continue to work on this plugin, and add more functions. I will post information on updates at my website.