# Other options (not shown for brevity)
index feed-items-delta : feed-items
{
source = feeds-delta
path = /usr/local/sphinx/var/data/feed-items-delta
}
indexer
{
mem_limit = 64M
}
searchd
{
listen = 9312
log = /usr/local/sphinx/var/log/feeds-searchd.log
query_log = /usr/local/sphinx/var/log/feeds-query.log
max_children = 30
pid_file = /usr/local/sphinx/var/log/feeds-searchd.pid
}

$ /usr/local/sphinx/bin/searchd -c /path/to/sphinx.conf --stop

$ /usr/local/sphinx/bin/searchd c /usr/local/sphinx/etc/feeds.conf i feed-items

<?php
/**
* File: /path/to/webroot/feeds/search.php
*/
include('init.php');
// Get the data from post if form is submitted...