function do_search($q, $author, $categories)
{
global $dbh, $viewVars;
// Include the api class
require('sphinxapi.php');
$client = new SphinxClient();
// Set search options
$client->SetServer('localhost', 9312);
$client->SetConnectTimeout(1);
$client->SetArrayResult(true);
// Set the mode to SPH_MATCH_EXTENDED2
$client->SetMatchMode(SPH_MATCH_EXTENDED2);
// Match the search term against title and description
$query = "@(title,description) ($q)";
// If we have author then match it against author field
if (!empty($author)) {
$query .= "@author $author";
}
// If categories were selected then filter the results
if (!empty($categories)) {
$client->SetFilter('category_id', $categories);
}
// Fire the search query against feed-items index (main index)
$viewVars['results'] = $client->Query($query, 'feed-items');
$viewVars['items'] = array...