Codice PHP:
function do_search($keywords, $type, $join1 = '', $where1 = '1', $arguments1 = array(), $select2 = 'i.relevance AS score', $join2 = '', $arguments2 = array(), $sort_parameters = 'ORDER BY score DESC') {
$query = search_parse_query($keywords);
if ($query[2] == '') {
form_set_error('keys', t('You must include at least one positive keyword with %count characters or more.', array('%count' => variable_get('minimum_word_size', 3))));
}
if ($query === NULL || $query[0] == '' || $query[2] == '') {
return array();
}
// First pass: select all possible matching sids, doing a simple index-based OR matching on the keywords.
// 'matches' is used to reject those items that cannot possibly match the query.
$conditions = $where1 .' AND ('. $query[2] .") AND i.type = '%s'";
$arguments = array_merge($arguments1, $query[3], array($type, $query[4]));
//----G // Temporary table not allowed.
//$result = db_query_temporary("SELECT i.type, i.sid, SUM(i.score * t.count) AS relevance, COUNT(*) AS matches FROM {search_index} i INNER JOIN {search_total} t ON i.word = t.word $join1 WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d", $arguments, 'temp_search_sids');
$result = db_query("CREATE TABLE IF NOT EXISTS temp_search_sids SELECT i.type, i.sid, SUM(i.score * t.count) AS relevance, COUNT(*) AS matches FROM {search_index} i INNER JOIN {search_total} t ON i.word = t.word $join1 WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d", $arguments);
// Calculate maximum relevance, to normalize it
$normalize = db_result(db_query('SELECT MAX(relevance) FROM temp_search_sids'));
if (!$normalize) {
return array();
}
$select2 = str_replace('i.relevance', '('. (1.0 / $normalize) .' * i.relevance)', $select2);
// Second pass: only keep items that match the complicated keywords conditions (phrase search, negative keywords, ...)
$conditions = '('. $query[0] .')';
$arguments = array_merge($arguments2, $query[1]);
//----G // Temporary table not allowed.
//$result = db_query_temporary("SELECT i.type, i.sid, $select2 FROM temp_search_sids i INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type $join2 WHERE $conditions $sort_parameters", $arguments, 'temp_search_results');
$result = db_query("CREATE TABLE IF NOT EXISTS temp_search_results SELECT i.type, i.sid, $select2 FROM temp_search_sids i INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type $join2 WHERE $conditions $sort_parameters", $arguments);
if (($count = db_result(db_query('SELECT COUNT(*) FROM temp_search_results'))) == 0) {
return array();
}
$count_query = "SELECT $count";
// Do actual search query
$result = pager_query("SELECT * FROM temp_search_results", 10, 0, $count_query);
$results = array();
while ($item = db_fetch_object($result)) {
$results[] = $item;
}
//----G // Temporary table not allowed.
db_query('DELETE LOW_PRIORITY FROM temp_search_sids');
db_query('DELETE LOW_PRIORITY FROM temp_search_results');
return $results;
}
Buon lavoro