This script will help you migrate from Serendipity to Wordpress. It is a plugin that you drop into Wordpress that will read your S9y database and migrate over your posts and comments.

There was none when I started, so there shall be none when I'm done. -JD

Public Domain or CC0

IF YOU HAVE MORE THAN 9000 POSTS OR COMMENTS: Please change the "+9000" and "-9000" below (3 locations total) to be a number larger than what you have. It is arbitrary, but important to prevent ID collisions during update.

1. Install Wordpress as normal
2. In the Wordpress DB

• TRUNCATE wp_posts;
• TRUNCATE `wp_postmeta`;
• TRUNCATE `wp_term_relationships`;
• TRUNCATE `wp_term_taxonomy`;
• TRUNCATE `wp_comments`;
• TRUNCATE `wp_commentmeta`;
• DELETE FROM wp_terms WHERE wp_terms.term_id!=1;

2. Copy included serendipity.php to /wordpress/wp-admin/import/
3. Login to Wordpress Admin Interface
4. Goto Tools > Import
5. Click "Serendipity"
6. Fill out the information, follow the proccess
7. Run the following SQL in the Wordpress DB

• UPDATE `wp_comments` as a SET a.`comment_post_ID`= (SELECT b.`menu_order` FROM `wp_posts` as b WHERE a.`comment_post_ID`= b.`ID`);
• UPDATE `wp_term_relationships` SET `object_id`=`object_id`+9000;
• UPDATE `wp_term_relationships` as a SET a.`object_id`= (SELECT b.`menu_order` FROM `wp_posts` as b WHERE a.`object_id`-9000= b.`ID`);
• UPDATE `wp_posts` SET `ID`=`ID`+9000;
• UPDATE `wp_posts` SET `ID`=`menu_order`, `guid`=CONCAT("http://MYURL.COM/?p=",`menu_order`), `menu_order`=null; -- Replace MYURL.COM with your URL
• SELECT `id`+1 FROM `wp_posts` ORDER BY `id` DESC LIMIT 0,1;
• ALTER TABLE `wp_posts` AUTO_INCREMENT = XXX; -- Where XXX is the value returned from the select above

8. Should be done.

• Comments become "flat" (IE "parents" aren't translated)
• After the import, you'll need to edit one of the categories (just open and save it) to fix the hierarchy.

GitHub Move (2013-07-13) - Jon Davis

• Migrated code from Google Code to new home on GitHub
• http://snowulf.com/2013/07/13/s9y-to-wp-has-a-new-home-on-github/

Version 1.7 ( 2012-03-15 ) - Abdussamad Abdurrazzaq

• fixed user import
• minor cleanups and removal of deprecated code.
• http://web.archive.org/web/20120719111540/http://abdussamad.com/archives/473-Converting-from-Serendipity-to-WordPress.html

Version 1.6 Released ( 2012-02-15 ) - Abdussamad Abdurrazzaq

• Support for nested comments
• Works as a plugin in WordPress

Version 1.5 Release (2010-10-27) - Simone Tellini

• Added support for nested categories
• http://tellini.info/2010/10/serendipity-to-wordpress/

Version 1.4 Release (2010-06-10) - Jon Davis

• Added draft/publish handling
• Added method to get post numbers to match on either side (see readme.txt file)
• Tested with S9y 1.5.2 to WP 2.9.2/3.0RC
• http://snowulf.com/2010/06/11/serendipity-to-wordpress-post-import/
• Code borrowed with permission from Dobschat.de

Version 1.3 Released (2008-11-08) - Dobschat

• split articles with <!--more-->
• import article-tags from s9y

Version 1.2 Released (2008-09-04)

• Fixes Category Association
• Breaks processing into smaller blogs for large imports
• Performance improvements

Version 1.1 Released (2006-02-01) - Dobschat

Version 1 released - Dobschat