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<?php
/* Simple example PHP5 script demonstrating query expansion.
*
* Copyright (C) 2007 Olly Betts
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
if (php_sapi_name() != "cli") {
print "This example script is written to run under the command line ('cli') version of\n";
print "the PHP interpreter, but you're using the '".php_sapi_name()."' version\n";
exit(1);
}
include "php5/xapian.php";
if ($argc < 3) {
print "Usage: {$argv[0]} PATH_TO_DATABASE QUERY [-- [DOCID...]]\n";
exit(1);
}
try {
// Open the database for searching.
$database = new XapianDatabase($argv[1]);
// Start an enquire session.
$enquire = new XapianEnquire($database);
// Combine command line arguments up to "--" with spaces between
// them, so that simple queries don't have to be quoted at the shell
// level.
$args = array_slice($argv, 2);
$separator = array_search("--", $args);
if ($separator === FALSE) {
$separator = count($args);
}
$query_string = join(" ", array_slice($args, 0, $separator));
$rset = new XapianRSet();
foreach (array_slice($args, $separator + 1) as $docid) {
$rset->add_document(intval($docid));
}
$qp = new XapianQueryParser();
$stemmer = new XapianStem("english");
$qp->set_stemmer($stemmer);
$qp->set_database($database);
$qp->set_stemming_strategy(XapianQueryParser::STEM_SOME);
$query = $qp->parse_query($query_string);
print "Parsed query is: {$query->get_description()}\n";
// Find the top 10 results for the query.
$enquire->set_query($query);
$matches = $enquire->get_mset(0, 10, $rset);
// Display the results.
print "{$matches->get_matches_estimated()} results found:\n";
$i = $matches->begin();
while (!$i->equals($matches->end())) {
$n = $i->get_rank() + 1;
$data = $i->get_document()->get_data();
print "$n: {$i->get_percent()}% docid={$i->get_docid()} [$data]\n\n";
$i->next();
}
// If no relevant docids were given, invent an RSet containing the top 5
// matches (or all the matches if there are less than 5).
if ($rset->is_empty()) {
$c = 5;
$i = $matches->begin();
while ($c-- && !$i->equals($matches->end())) {
$rset->add_document($i->get_docid());
$i->next();
}
}
// Generate an ESet containing terms that the user might want to add to
// the query.
$eset = $enquire->get_eset(10, $rset);
// List the terms.
for ($t = $eset->begin(); !$t->equals($eset->end()); $t->next()) {
print "{$t->get_term()}: weight = {$t->get_weight()}\n";
}
} catch (Exception $e) {
print $e->getMessage() . "\n";
exit(1);
}
?>
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