function search($dbpath, $querystring, $offset = 0, $pagesize = 10)
{
// offset - defines starting point within result set
// pagesize - defines number of records to retrieve
// Open the database we're going to search.
$db = new XapianDatabase($dbpath);
// Set up a QueryParser with a stemmer and suitable prefixes
$queryparser = new XapianQueryParser();
$queryparser->set_stemmer(new XapianStem("english"));
$queryparser->set_stem_strategy(XapianQueryParser::STEM_SOME);
$queryparser->add_prefix("title", "S");
$queryparser->add_prefix("description", "XD");
// And parse the query
$query = $queryparser->parse_query($querystring);
// Use an Enquire object on the database to run the query
$enquire = new XapianEnquire($db);
$enquire->set_query($query);
// Set up a spy to inspect the MAKER value at slot 1
$spy = new XapianValueCountMatchSpy(1);
$enquire->add_matchspy($spy);
// Retrieve the matches and compute start and end points
$matches = $enquire->get_mset($offset, $pagesize);
$start = $matches->begin();
$end = $matches->end();
$index = 0;
// Use an array to record the DocIds of each match
$docids = array();
while (!$start->equals($end)) {
// retrieve the document and its data
$doc = $start->get_document();
$fields = json_decode($doc->get_data());
$position = $offset + $index + 1;
// record the docid
$docid = $start->get_docid();
$docids[] = $docid;
// display the results
print sprintf("%d: #%03d %s\n", $position, $docid, $fields->TITLE);
// increment MSet iterator and our counter
$start->next();
$index++;
}
// Parse and display the spy values
$spy_start = $spy->values_begin();
$spy_end = $spy->values_end();
while (!$spy_start->equals($spy_end)) {
print sprintf("Facet: %s; count: %d\n", $spy_start->get_term(), $spy_start->get_termfreq());
$spy_start->next();
}
// Finally, make sure we log the query and displayed results
log_info(sprintf("xapian.search:'%s'[%d:%d] = %s", $querystring, $offset, $offset + $pagesize, implode(" ", $docids)));
}
