Configure WP to ping Yahoo

Jeremy Zawodny pointed out a method to ping Yahoo RSS crawler for Moveable Type blogs and he did a great job explaining it with pictures. I consequently hacked a little pinger for WordPress which does the same thing.
Add this function to your my-hacks.php:

// pings Yahoo.com RSS Crawler
function pingYahoo($blog_ID = 1) {
// original function by Dries Buytaert for Drupal
global $blogname,$siteurl,$blogfilename;
if ((!(($blogname=="my weblog") && ($siteurl=="http://example.com") && ($blogfilename=="wp.php"))) && (!preg_match("/localhost\//",$siteurl))) {
$client = new xmlrpc_client("/RPC2", "api.my.yahoo.com", 80);
$message = new xmlrpcmsg("weblogUpdates.ping", array(new xmlrpcval($blogname), new xmlrpcval($siteurl."/".$blogfilename)));
$result = $client->send($message);
if (!$result || $result->faultCode()) {
return false;
}
return true;
} else {
return false;
}
}

Find these lines in your post.php (inside wp-admin folder) :
pingWeblogs($blog_ID);
pingBlogs($blog_ID);
And add this right after that:
pingYahoo($blog_ID);
All done and pingin!