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Search.php
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Search.php
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<?php
/**
* Handle all of the searching from here.
*
* Simple Machines Forum (SMF)
*
* @package SMF
* @author Simple Machines http://www.simplemachines.org
* @copyright 2012 Simple Machines
* @license http://www.simplemachines.org/about/smf/license.php BSD
*
* @version 2.1 Alpha 1
*/
if (!defined('SMF'))
die('Hacking attempt...');
// This defines two version types for checking the API's are compatible with this version of SMF.
$GLOBALS['search_versions'] = array(
// This is the forum version but is repeated due to some people rewriting $forum_version.
'forum_version' => 'SMF 2.1 Alpha 1',
// This is the minimum version of SMF that an API could have been written for to work. (strtr to stop accidentally updating version on release)
'search_version' => strtr('SMF 2+1=Alpha=1', array('+' => '.', '=' => ' ')),
);
/**
* Ask the user what they want to search for.
* What it does:
* - shows the screen to search forum posts (action=search), and uses the simple version if the simpleSearch setting is enabled.
* - uses the main sub template of the Search template.
* - uses the Search language file.
* - requires the search_posts permission.
* - decodes and loads search parameters given in the URL (if any).
* - the form redirects to index.php?action=search2.
*/
function PlushSearch1()
{
global $txt, $scripturl, $modSettings, $user_info, $context, $smcFunc, $sourcedir;
// Is the load average too high to allow searching just now?
if (!empty($context['load_average']) && !empty($modSettings['loadavg_search']) && $context['load_average'] >= $modSettings['loadavg_search'])
fatal_lang_error('loadavg_search_disabled', false);
loadLanguage('Search');
// Don't load this in XML mode.
if (!isset($_REQUEST['xml']))
loadTemplate('Search');
// Check the user's permissions.
isAllowedTo('search_posts');
// Link tree....
$context['linktree'][] = array(
'url' => $scripturl . '?action=search',
'name' => $txt['search']
);
// This is hard coded maximum string length.
$context['search_string_limit'] = 100;
$context['require_verification'] = $user_info['is_guest'] && !empty($modSettings['search_enable_captcha']) && empty($_SESSION['ss_vv_passed']);
if ($context['require_verification'])
{
require_once($sourcedir . '/Subs-Editor.php');
$verificationOptions = array(
'id' => 'search',
);
$context['require_verification'] = create_control_verification($verificationOptions);
$context['visual_verification_id'] = $verificationOptions['id'];
}
// If you got back from search2 by using the linktree, you get your original search parameters back.
if (isset($_REQUEST['params']))
{
// Due to IE's 2083 character limit, we have to compress long search strings
$temp_params = base64_decode(str_replace(array('-', '_', '.'), array('+', '/', '='), $_REQUEST['params']));
// Test for gzuncompress failing
$temp_params2 = @gzuncompress($temp_params);
$temp_params = explode('|"|', !empty($temp_params2) ? $temp_params2 : $temp_params);
$context['search_params'] = array();
foreach ($temp_params as $i => $data)
{
@list ($k, $v) = explode('|\'|', $data);
$context['search_params'][$k] = $v;
}
if (isset($context['search_params']['brd']))
$context['search_params']['brd'] = $context['search_params']['brd'] == '' ? array() : explode(',', $context['search_params']['brd']);
}
if (isset($_REQUEST['search']))
$context['search_params']['search'] = un_htmlspecialchars($_REQUEST['search']);
if (isset($context['search_params']['search']))
$context['search_params']['search'] = $smcFunc['htmlspecialchars']($context['search_params']['search']);
if (isset($context['search_params']['userspec']))
$context['search_params']['userspec'] = htmlspecialchars($context['search_params']['userspec']);
if (!empty($context['search_params']['searchtype']))
$context['search_params']['searchtype'] = 2;
if (!empty($context['search_params']['minage']))
$context['search_params']['minage'] = (int) $context['search_params']['minage'];
if (!empty($context['search_params']['maxage']))
$context['search_params']['maxage'] = (int) $context['search_params']['maxage'];
$context['search_params']['show_complete'] = !empty($context['search_params']['show_complete']);
$context['search_params']['subject_only'] = !empty($context['search_params']['subject_only']);
// Load the error text strings if there were errors in the search.
if (!empty($context['search_errors']))
{
loadLanguage('Errors');
$context['search_errors']['messages'] = array();
foreach ($context['search_errors'] as $search_error => $dummy)
{
if ($search_error === 'messages')
continue;
if ($search_error == 'string_too_long')
$txt['error_string_too_long'] = sprintf($txt['error_string_too_long'], $context['search_string_limit']);
$context['search_errors']['messages'][] = $txt['error_' . $search_error];
}
}
// Find all the boards this user is allowed to see.
$request = $smcFunc['db_query']('order_by_board_order', '
SELECT b.id_cat, c.name AS cat_name, b.id_board, b.name, b.child_level
FROM {db_prefix}boards AS b
LEFT JOIN {db_prefix}categories AS c ON (c.id_cat = b.id_cat)
WHERE {query_see_board}
AND redirect = {string:empty_string}',
array(
'empty_string' => '',
)
);
$context['num_boards'] = $smcFunc['db_num_rows']($request);
$context['boards_check_all'] = true;
$context['categories'] = array();
while ($row = $smcFunc['db_fetch_assoc']($request))
{
// This category hasn't been set up yet..
if (!isset($context['categories'][$row['id_cat']]))
$context['categories'][$row['id_cat']] = array(
'id' => $row['id_cat'],
'name' => $row['cat_name'],
'boards' => array()
);
// Set this board up, and let the template know when it's a child. (indent them..)
$context['categories'][$row['id_cat']]['boards'][$row['id_board']] = array(
'id' => $row['id_board'],
'name' => $row['name'],
'child_level' => $row['child_level'],
'selected' => (empty($context['search_params']['brd']) && (empty($modSettings['recycle_enable']) || $row['id_board'] != $modSettings['recycle_board']) && !in_array($row['id_board'], $user_info['ignoreboards'])) || (!empty($context['search_params']['brd']) && in_array($row['id_board'], $context['search_params']['brd']))
);
// If a board wasn't checked that probably should have been ensure the board selection is selected, yo!
if (!$context['categories'][$row['id_cat']]['boards'][$row['id_board']]['selected'] && (empty($modSettings['recycle_enable']) || $row['id_board'] != $modSettings['recycle_board']))
$context['boards_check_all'] = false;
}
$smcFunc['db_free_result']($request);
// Now, let's sort the list of categories into the boards for templates that like that.
$temp_boards = array();
foreach ($context['categories'] as $category)
{
$temp_boards[] = array(
'name' => $category['name'],
'child_ids' => array_keys($category['boards'])
);
$temp_boards = array_merge($temp_boards, array_values($category['boards']));
// Include a list of boards per category for easy toggling.
$context['categories'][$category['id']]['child_ids'] = array_keys($category['boards']);
}
$max_boards = ceil(count($temp_boards) / 2);
if ($max_boards == 1)
$max_boards = 2;
// Now, alternate them so they can be shown left and right ;).
$context['board_columns'] = array();
for ($i = 0; $i < $max_boards; $i++)
{
$context['board_columns'][] = $temp_boards[$i];
if (isset($temp_boards[$i + $max_boards]))
$context['board_columns'][] = $temp_boards[$i + $max_boards];
else
$context['board_columns'][] = array();
}
if (!empty($_REQUEST['topic']))
{
$context['search_params']['topic'] = (int) $_REQUEST['topic'];
$context['search_params']['show_complete'] = true;
}
if (!empty($context['search_params']['topic']))
{
$context['search_params']['topic'] = (int) $context['search_params']['topic'];
$context['search_topic'] = array(
'id' => $context['search_params']['topic'],
'href' => $scripturl . '?topic=' . $context['search_params']['topic'] . '.0',
);
$request = $smcFunc['db_query']('', '
SELECT ms.subject
FROM {db_prefix}topics AS t
INNER JOIN {db_prefix}boards AS b ON (b.id_board = t.id_board)
INNER JOIN {db_prefix}messages AS ms ON (ms.id_msg = t.id_first_msg)
WHERE t.id_topic = {int:search_topic_id}
AND {query_see_board}' . ($modSettings['postmod_active'] ? '
AND t.approved = {int:is_approved_true}' : '') . '
LIMIT 1',
array(
'is_approved_true' => 1,
'search_topic_id' => $context['search_params']['topic'],
)
);
if ($smcFunc['db_num_rows']($request) == 0)
fatal_lang_error('topic_gone', false);
list ($context['search_topic']['subject']) = $smcFunc['db_fetch_row']($request);
$smcFunc['db_free_result']($request);
$context['search_topic']['link'] = '<a href="' . $context['search_topic']['href'] . '">' . $context['search_topic']['subject'] . '</a>';
}
// Simple or not?
$context['simple_search'] = isset($context['search_params']['advanced']) ? empty($context['search_params']['advanced']) : !empty($modSettings['simpleSearch']) && !isset($_REQUEST['advanced']);
$context['page_title'] = $txt['set_parameters'];
call_integration_hook('integrate_search');
}
/**
* Gather the results and show them.
* What it does:
* - checks user input and searches the messages table for messages matching the query.
* - requires the search_posts permission.
* - uses the results sub template of the Search template.
* - uses the Search language file.
* - stores the results into the search cache.
* - show the results of the search query.
*/
function PlushSearch2()
{
global $scripturl, $modSettings, $sourcedir, $txt, $db_connection;
global $user_info, $context, $options, $messages_request, $boards_can;
global $excludedWords, $participants, $smcFunc;
// if comming from the quick search box, and we want to search on members, well we need to do that ;)
if (isset($_REQUEST['search_selection']) && $_REQUEST['search_selection'] === 'members')
redirectexit($scripturl . '?action=mlist;sa=search;fields=name,email;search=' . urlencode($_REQUEST['search']));
if (!empty($context['load_average']) && !empty($modSettings['loadavg_search']) && $context['load_average'] >= $modSettings['loadavg_search'])
fatal_lang_error('loadavg_search_disabled', false);
// No, no, no... this is a bit hard on the server, so don't you go prefetching it!
if (isset($_SERVER['HTTP_X_MOZ']) && $_SERVER['HTTP_X_MOZ'] == 'prefetch')
{
ob_end_clean();
header('HTTP/1.1 403 Forbidden');
die;
}
$weight_factors = array(
'frequency' => array(
'search' => 'COUNT(*) / (MAX(t.num_replies) + 1)',
'results' => '(t.num_replies + 1)',
),
'age' => array(
'search' => 'CASE WHEN MAX(m.id_msg) < {int:min_msg} THEN 0 ELSE (MAX(m.id_msg) - {int:min_msg}) / {int:recent_message} END',
'results' => 'CASE WHEN t.id_first_msg < {int:min_msg} THEN 0 ELSE (t.id_first_msg - {int:min_msg}) / {int:recent_message} END',
),
'length' => array(
'search' => 'CASE WHEN MAX(t.num_replies) < {int:huge_topic_posts} THEN MAX(t.num_replies) / {int:huge_topic_posts} ELSE 1 END',
'results' => 'CASE WHEN t.num_replies < {int:huge_topic_posts} THEN t.num_replies / {int:huge_topic_posts} ELSE 1 END',
),
'subject' => array(
'search' => 0,
'results' => 0,
),
'first_message' => array(
'search' => 'CASE WHEN MIN(m.id_msg) = MAX(t.id_first_msg) THEN 1 ELSE 0 END',
),
'sticky' => array(
'search' => 'MAX(t.is_sticky)',
'results' => 't.is_sticky',
),
);
call_integration_hook('integrate_search_weights', array(&$weight_factors));
$weight = array();
$weight_total = 0;
foreach ($weight_factors as $weight_factor => $value)
{
$weight[$weight_factor] = empty($modSettings['search_weight_' . $weight_factor]) ? 0 : (int) $modSettings['search_weight_' . $weight_factor];
$weight_total += $weight[$weight_factor];
}
// Zero weight. Weightless :P.
if (empty($weight_total))
fatal_lang_error('search_invalid_weights');
// These vars don't require an interface, they're just here for tweaking.
$recentPercentage = 0.30;
$humungousTopicPosts = 200;
$maxMembersToSearch = 500;
$maxMessageResults = empty($modSettings['search_max_results']) ? 0 : $modSettings['search_max_results'] * 5;
// Start with no errors.
$context['search_errors'] = array();
// Number of pages hard maximum - normally not set at all.
$modSettings['search_max_results'] = empty($modSettings['search_max_results']) ? 200 * $modSettings['search_results_per_page'] : (int) $modSettings['search_max_results'];
// Maximum length of the string.
$context['search_string_limit'] = 100;
loadLanguage('Search');
if (!isset($_REQUEST['xml']))
loadTemplate('Search');
//If we're doing XML we need to use the results template regardless really.
else
$context['sub_template'] = 'results';
// Are you allowed?
isAllowedTo('search_posts');
require_once($sourcedir . '/Display.php');
require_once($sourcedir . '/Subs-Package.php');
// Search has a special database set.
db_extend('search');
// Load up the search API we are going to use.
$searchAPI = findSearchAPI();
// $search_params will carry all settings that differ from the default search parameters.
// That way, the URLs involved in a search page will be kept as short as possible.
$search_params = array();
if (isset($_REQUEST['params']))
{
// Due to IE's 2083 character limit, we have to compress long search strings
$temp_params = base64_decode(str_replace(array('-', '_', '.'), array('+', '/', '='), $_REQUEST['params']));
// Test for gzuncompress failing
$temp_params2 = @gzuncompress($temp_params);
$temp_params = explode('|"|', (!empty($temp_params2) ? $temp_params2 : $temp_params));
foreach ($temp_params as $i => $data)
{
@list($k, $v) = explode('|\'|', $data);
$search_params[$k] = $v;
}
if (isset($search_params['brd']))
$search_params['brd'] = empty($search_params['brd']) ? array() : explode(',', $search_params['brd']);
}
// Store whether simple search was used (needed if the user wants to do another query).
if (!isset($search_params['advanced']))
$search_params['advanced'] = empty($_REQUEST['advanced']) ? 0 : 1;
// 1 => 'allwords' (default, don't set as param) / 2 => 'anywords'.
if (!empty($search_params['searchtype']) || (!empty($_REQUEST['searchtype']) && $_REQUEST['searchtype'] == 2))
$search_params['searchtype'] = 2;
// Minimum age of messages. Default to zero (don't set param in that case).
if (!empty($search_params['minage']) || (!empty($_REQUEST['minage']) && $_REQUEST['minage'] > 0))
$search_params['minage'] = !empty($search_params['minage']) ? (int) $search_params['minage'] : (int) $_REQUEST['minage'];
// Maximum age of messages. Default to infinite (9999 days: param not set).
if (!empty($search_params['maxage']) || (!empty($_REQUEST['maxage']) && $_REQUEST['maxage'] < 9999))
$search_params['maxage'] = !empty($search_params['maxage']) ? (int) $search_params['maxage'] : (int) $_REQUEST['maxage'];
// Searching a specific topic?
if (!empty($_REQUEST['topic']) || (!empty($_REQUEST['search_selection']) && $_REQUEST['search_selection'] == 'topic'))
{
$search_params['topic'] = empty($_REQUEST['search_selection']) ? (int) $_REQUEST['topic'] : (isset($_REQUEST['sd_topic']) ? (int) $_REQUEST['sd_topic'] : '');
$search_params['show_complete'] = true;
}
elseif (!empty($search_params['topic']))
$search_params['topic'] = (int) $search_params['topic'];
if (!empty($search_params['minage']) || !empty($search_params['maxage']))
{
$request = $smcFunc['db_query']('', '
SELECT ' . (empty($search_params['maxage']) ? '0, ' : 'IFNULL(MIN(id_msg), -1), ') . (empty($search_params['minage']) ? '0' : 'IFNULL(MAX(id_msg), -1)') . '
FROM {db_prefix}messages
WHERE 1=1' . ($modSettings['postmod_active'] ? '
AND approved = {int:is_approved_true}' : '') . (empty($search_params['minage']) ? '' : '
AND poster_time <= {int:timestamp_minimum_age}') . (empty($search_params['maxage']) ? '' : '
AND poster_time >= {int:timestamp_maximum_age}'),
array(
'timestamp_minimum_age' => empty($search_params['minage']) ? 0 : time() - 86400 * $search_params['minage'],
'timestamp_maximum_age' => empty($search_params['maxage']) ? 0 : time() - 86400 * $search_params['maxage'],
'is_approved_true' => 1,
)
);
list ($minMsgID, $maxMsgID) = $smcFunc['db_fetch_row']($request);
if ($minMsgID < 0 || $maxMsgID < 0)
$context['search_errors']['no_messages_in_time_frame'] = true;
$smcFunc['db_free_result']($request);
}
// Default the user name to a wildcard matching every user (*).
if (!empty($search_params['userspec']) || (!empty($_REQUEST['userspec']) && $_REQUEST['userspec'] != '*'))
$search_params['userspec'] = isset($search_params['userspec']) ? $search_params['userspec'] : $_REQUEST['userspec'];
// If there's no specific user, then don't mention it in the main query.
if (empty($search_params['userspec']))
$userQuery = '';
else
{
$userString = strtr($smcFunc['htmlspecialchars']($search_params['userspec'], ENT_QUOTES), array('"' => '"'));
$userString = strtr($userString, array('%' => '\%', '_' => '\_', '*' => '%', '?' => '_'));
preg_match_all('~"([^"]+)"~', $userString, $matches);
$possible_users = array_merge($matches[1], explode(',', preg_replace('~"[^"]+"~', '', $userString)));
for ($k = 0, $n = count($possible_users); $k < $n; $k++)
{
$possible_users[$k] = trim($possible_users[$k]);
if (strlen($possible_users[$k]) == 0)
unset($possible_users[$k]);
}
// Create a list of database-escaped search names.
$realNameMatches = array();
foreach ($possible_users as $possible_user)
$realNameMatches[] = $smcFunc['db_quote'](
'{string:possible_user}',
array(
'possible_user' => $possible_user
)
);
// Retrieve a list of possible members.
$request = $smcFunc['db_query']('', '
SELECT id_member
FROM {db_prefix}members
WHERE {raw:match_possible_users}',
array(
'match_possible_users' => 'real_name LIKE ' . implode(' OR real_name LIKE ', $realNameMatches),
)
);
// Simply do nothing if there're too many members matching the criteria.
if ($smcFunc['db_num_rows']($request) > $maxMembersToSearch)
$userQuery = '';
elseif ($smcFunc['db_num_rows']($request) == 0)
{
$userQuery = $smcFunc['db_quote'](
'm.id_member = {int:id_member_guest} AND ({raw:match_possible_guest_names})',
array(
'id_member_guest' => 0,
'match_possible_guest_names' => 'm.poster_name LIKE ' . implode(' OR m.poster_name LIKE ', $realNameMatches),
)
);
}
else
{
$memberlist = array();
while ($row = $smcFunc['db_fetch_assoc']($request))
$memberlist[] = $row['id_member'];
$userQuery = $smcFunc['db_quote'](
'(m.id_member IN ({array_int:matched_members}) OR (m.id_member = {int:id_member_guest} AND ({raw:match_possible_guest_names})))',
array(
'matched_members' => $memberlist,
'id_member_guest' => 0,
'match_possible_guest_names' => 'm.poster_name LIKE ' . implode(' OR m.poster_name LIKE ', $realNameMatches),
)
);
}
$smcFunc['db_free_result']($request);
}
// If the boards were passed by URL (params=), temporarily put them back in $_REQUEST.
if (!empty($search_params['brd']) && is_array($search_params['brd']))
$_REQUEST['brd'] = $search_params['brd'];
// Ensure that brd is an array.
if ((!empty($_REQUEST['brd']) && !is_array($_REQUEST['brd'])) || (!empty($_REQUEST['search_selection']) && $_REQUEST['search_selection'] == 'board'))
{
if (!empty($_REQUEST['brd']))
$_REQUEST['brd'] = strpos($_REQUEST['brd'], ',') !== false ? explode(',', $_REQUEST['brd']) : array($_REQUEST['brd']);
else
$_REQUEST['brd'] = isset($_REQUEST['sd_brd']) ? array($_REQUEST['sd_brd']) : array();
}
// Make sure all boards are integers.
if (!empty($_REQUEST['brd']))
foreach ($_REQUEST['brd'] as $id => $brd)
$_REQUEST['brd'][$id] = (int) $brd;
// Special case for boards: searching just one topic?
if (!empty($search_params['topic']))
{
$request = $smcFunc['db_query']('', '
SELECT b.id_board
FROM {db_prefix}topics AS t
INNER JOIN {db_prefix}boards AS b ON (b.id_board = t.id_board)
WHERE t.id_topic = {int:search_topic_id}
AND {query_see_board}' . ($modSettings['postmod_active'] ? '
AND t.approved = {int:is_approved_true}' : '') . '
LIMIT 1',
array(
'search_topic_id' => $search_params['topic'],
'is_approved_true' => 1,
)
);
if ($smcFunc['db_num_rows']($request) == 0)
fatal_lang_error('topic_gone', false);
$search_params['brd'] = array();
list ($search_params['brd'][0]) = $smcFunc['db_fetch_row']($request);
$smcFunc['db_free_result']($request);
}
// Select all boards you've selected AND are allowed to see.
elseif ($user_info['is_admin'] && (!empty($search_params['advanced']) || !empty($_REQUEST['brd'])))
$search_params['brd'] = empty($_REQUEST['brd']) ? array() : $_REQUEST['brd'];
else
{
$see_board = empty($search_params['advanced']) ? 'query_wanna_see_board' : 'query_see_board';
$request = $smcFunc['db_query']('', '
SELECT b.id_board
FROM {db_prefix}boards AS b
WHERE {raw:boards_allowed_to_see}
AND redirect = {string:empty_string}' . (empty($_REQUEST['brd']) ? (!empty($modSettings['recycle_enable']) && $modSettings['recycle_board'] > 0 ? '
AND b.id_board != {int:recycle_board_id}' : '') : '
AND b.id_board IN ({array_int:selected_search_boards})'),
array(
'boards_allowed_to_see' => $user_info[$see_board],
'empty_string' => '',
'selected_search_boards' => empty($_REQUEST['brd']) ? array() : $_REQUEST['brd'],
'recycle_board_id' => $modSettings['recycle_board'],
)
);
$search_params['brd'] = array();
while ($row = $smcFunc['db_fetch_assoc']($request))
$search_params['brd'][] = $row['id_board'];
$smcFunc['db_free_result']($request);
// This error should pro'bly only happen for hackers.
if (empty($search_params['brd']))
$context['search_errors']['no_boards_selected'] = true;
}
if (count($search_params['brd']) != 0)
{
foreach ($search_params['brd'] as $k => $v)
$search_params['brd'][$k] = (int) $v;
// If we've selected all boards, this parameter can be left empty.
$request = $smcFunc['db_query']('', '
SELECT COUNT(*)
FROM {db_prefix}boards
WHERE redirect = {string:empty_string}',
array(
'empty_string' => '',
)
);
list ($num_boards) = $smcFunc['db_fetch_row']($request);
$smcFunc['db_free_result']($request);
if (count($search_params['brd']) == $num_boards)
$boardQuery = '';
elseif (count($search_params['brd']) == $num_boards - 1 && !empty($modSettings['recycle_board']) && !in_array($modSettings['recycle_board'], $search_params['brd']))
$boardQuery = '!= ' . $modSettings['recycle_board'];
else
$boardQuery = 'IN (' . implode(', ', $search_params['brd']) . ')';
}
else
$boardQuery = '';
$search_params['show_complete'] = !empty($search_params['show_complete']) || !empty($_REQUEST['show_complete']);
$search_params['subject_only'] = !empty($search_params['subject_only']) || !empty($_REQUEST['subject_only']);
$context['compact'] = !$search_params['show_complete'];
// Get the sorting parameters right. Default to sort by relevance descending.
$sort_columns = array(
'relevance',
'num_replies',
'id_msg',
);
call_integration_hook('integrate_search_sort_columns', array(&$sort_columns));
if (empty($search_params['sort']) && !empty($_REQUEST['sort']))
list ($search_params['sort'], $search_params['sort_dir']) = array_pad(explode('|', $_REQUEST['sort']), 2, '');
$search_params['sort'] = !empty($search_params['sort']) && in_array($search_params['sort'], $sort_columns) ? $search_params['sort'] : 'relevance';
if (!empty($search_params['topic']) && $search_params['sort'] === 'num_replies')
$search_params['sort'] = 'id_msg';
// Sorting direction: descending unless stated otherwise.
$search_params['sort_dir'] = !empty($search_params['sort_dir']) && $search_params['sort_dir'] == 'asc' ? 'asc' : 'desc';
// Determine some values needed to calculate the relevance.
$minMsg = (int) ((1 - $recentPercentage) * $modSettings['maxMsgID']);
$recentMsg = $modSettings['maxMsgID'] - $minMsg;
// *** Parse the search query
call_integration_hook('integrate_search_params', array(&$search_params));
/*
* Unfortunately, searching for words like this is going to be slow, so we're blacklisting them.
*
* @todo Setting to add more here?
* @todo Maybe only blacklist if they are the only word, or "any" is used?
*/
$blacklisted_words = array('img', 'url', 'quote', 'www', 'http', 'the', 'is', 'it', 'are', 'if');
call_integration_hook('integrate_search_blacklisted_words', array(&$blacklisted_words));
// What are we searching for?
if (empty($search_params['search']))
{
if (isset($_GET['search']))
$search_params['search'] = un_htmlspecialchars($_GET['search']);
elseif (isset($_POST['search']))
$search_params['search'] = $_POST['search'];
else
$search_params['search'] = '';
}
// Nothing??
if (!isset($search_params['search']) || $search_params['search'] == '')
$context['search_errors']['invalid_search_string'] = true;
// Too long?
elseif ($smcFunc['strlen']($search_params['search']) > $context['search_string_limit'])
{
$context['search_errors']['string_too_long'] = true;
}
// Change non-word characters into spaces.
$stripped_query = preg_replace('~(?:[\x0B\0' . ($context['utf8'] ? '\x{A0}' : '\xA0') . '\t\r\s\n(){}\\[\\]<>!@$%^*.,:+=`\~\?/\\\\]+|&(?:amp|lt|gt|quot);)+~' . ($context['utf8'] ? 'u' : ''), ' ', $search_params['search']);
// Make the query lower case. It's gonna be case insensitive anyway.
$stripped_query = un_htmlspecialchars($smcFunc['strtolower']($stripped_query));
// This (hidden) setting will do fulltext searching in the most basic way.
if (!empty($modSettings['search_simple_fulltext']))
$stripped_query = strtr($stripped_query, array('"' => ''));
$no_regexp = preg_match('~&#(?:\d{1,7}|x[0-9a-fA-F]{1,6});~', $stripped_query) === 1;
// Extract phrase parts first (e.g. some words "this is a phrase" some more words.)
preg_match_all('/(?:^|\s)([-]?)"([^"]+)"(?:$|\s)/', $stripped_query, $matches, PREG_PATTERN_ORDER);
$phraseArray = $matches[2];
// Remove the phrase parts and extract the words.
$wordArray = preg_replace('~(?:^|\s)(?:[-]?)"(?:[^"]+)"(?:$|\s)~' . ($context['utf8'] ? 'u' : ''), ' ', $search_params['search']);
$wordArray = explode(' ', $smcFunc['htmlspecialchars'](un_htmlspecialchars($wordArray), ENT_QUOTES));
// A minus sign in front of a word excludes the word.... so...
$excludedWords = array();
$excludedIndexWords = array();
$excludedSubjectWords = array();
$excludedPhrases = array();
// .. first, we check for things like -"some words", but not "-some words".
foreach ($matches[1] as $index => $word)
{
if ($word === '-')
{
if (($word = trim($phraseArray[$index], '-_\' ')) !== '' && !in_array($word, $blacklisted_words))
$excludedWords[] = $word;
unset($phraseArray[$index]);
}
}
// Now we look for -test, etc.... normaller.
foreach ($wordArray as $index => $word)
{
if (strpos(trim($word), '-') === 0)
{
if (($word = trim($word, '-_\' ')) !== '' && !in_array($word, $blacklisted_words))
$excludedWords[] = $word;
unset($wordArray[$index]);
}
}
// The remaining words and phrases are all included.
$searchArray = array_merge($phraseArray, $wordArray);
$context['search_ignored'] = array();
// Trim everything and make sure there are no words that are the same.
foreach ($searchArray as $index => $value)
{
// Skip anything practically empty.
if (($searchArray[$index] = trim($value, '-_\' ')) === '')
unset($searchArray[$index]);
// Skip blacklisted words. Make sure to note we skipped them in case we end up with nothing.
elseif (in_array($searchArray[$index], $blacklisted_words))
{
$foundBlackListedWords = true;
unset($searchArray[$index]);
}
// Don't allow very, very short words.
elseif ($smcFunc['strlen']($value) < 2)
{
$context['search_ignored'][] = $value;
unset($searchArray[$index]);
}
else
$searchArray[$index] = $searchArray[$index];
}
$searchArray = array_slice(array_unique($searchArray), 0, 10);
// Create an array of replacements for highlighting.
$context['mark'] = array();
foreach ($searchArray as $word)
$context['mark'][$word] = '<strong class="highlight">' . $word . '</strong>';
// Initialize two arrays storing the words that have to be searched for.
$orParts = array();
$searchWords = array();
// Make sure at least one word is being searched for.
if (empty($searchArray))
$context['search_errors']['invalid_search_string' . (!empty($foundBlackListedWords) ? '_blacklist' : '')] = true;
// All words/sentences must match.
elseif (empty($search_params['searchtype']))
$orParts[0] = $searchArray;
// Any word/sentence must match.
else
foreach ($searchArray as $index => $value)
$orParts[$index] = array($value);
// Don't allow duplicate error messages if one string is too short.
if (isset($context['search_errors']['search_string_small_words'], $context['search_errors']['invalid_search_string']))
unset($context['search_errors']['invalid_search_string']);
// Make sure the excluded words are in all or-branches.
foreach ($orParts as $orIndex => $andParts)
foreach ($excludedWords as $word)
$orParts[$orIndex][] = $word;
// Determine the or-branches and the fulltext search words.
foreach ($orParts as $orIndex => $andParts)
{
$searchWords[$orIndex] = array(
'indexed_words' => array(),
'words' => array(),
'subject_words' => array(),
'all_words' => array(),
'complex_words' => array(),
);
// Sort the indexed words (large words -> small words -> excluded words).
if ($searchAPI->supportsMethod('searchSort'))
usort($orParts[$orIndex], 'searchSort');
foreach ($orParts[$orIndex] as $word)
{
$is_excluded = in_array($word, $excludedWords);
$searchWords[$orIndex]['all_words'][] = $word;
$subjectWords = text2words($word);
if (!$is_excluded || count($subjectWords) === 1)
{
$searchWords[$orIndex]['subject_words'] = array_merge($searchWords[$orIndex]['subject_words'], $subjectWords);
if ($is_excluded)
$excludedSubjectWords = array_merge($excludedSubjectWords, $subjectWords);
}
else
$excludedPhrases[] = $word;
// Have we got indexes to prepare?
if ($searchAPI->supportsMethod('prepareIndexes'))
$searchAPI->prepareIndexes($word, $searchWords[$orIndex], $excludedIndexWords, $is_excluded);
}
// Search_force_index requires all AND parts to have at least one fulltext word.
if (!empty($modSettings['search_force_index']) && empty($searchWords[$orIndex]['indexed_words']))
{
$context['search_errors']['query_not_specific_enough'] = true;
break;
}
elseif ($search_params['subject_only'] && empty($searchWords[$orIndex]['subject_words']) && empty($excludedSubjectWords))
{
$context['search_errors']['query_not_specific_enough'] = true;
break;
}
// Make sure we aren't searching for too many indexed words.
else
{
$searchWords[$orIndex]['indexed_words'] = array_slice($searchWords[$orIndex]['indexed_words'], 0, 7);
$searchWords[$orIndex]['subject_words'] = array_slice($searchWords[$orIndex]['subject_words'], 0, 7);
$searchWords[$orIndex]['words'] = array_slice($searchWords[$orIndex]['words'], 0, 4);
}
}
// *** Spell checking
$context['show_spellchecking'] = !empty($modSettings['enableSpellChecking']) && function_exists('pspell_new');
if ($context['show_spellchecking'])
{
// Windows fix.
ob_start();
$old = error_reporting(0);
pspell_new('en');
$pspell_link = pspell_new($txt['lang_dictionary'], $txt['lang_spelling'], '', strtr($txt['lang_character_set'], array('iso-' => 'iso', 'ISO-' => 'iso')), PSPELL_FAST | PSPELL_RUN_TOGETHER);
if (!$pspell_link)
$pspell_link = pspell_new('en', '', '', '', PSPELL_FAST | PSPELL_RUN_TOGETHER);
error_reporting($old);
ob_end_clean();
$did_you_mean = array('search' => array(), 'display' => array());
$found_misspelling = false;
foreach ($searchArray as $word)
{
if (empty($pspell_link))
continue;
// Don't check phrases.
if (preg_match('~^\w+$~', $word) === 0)
{
$did_you_mean['search'][] = '"' . $word . '"';
$did_you_mean['display'][] = '"' . $smcFunc['htmlspecialchars']($word) . '"';
continue;
}
// For some strange reason spell check can crash PHP on decimals.
elseif (preg_match('~\d~', $word) === 1)
{
$did_you_mean['search'][] = $word;
$did_you_mean['display'][] = $smcFunc['htmlspecialchars']($word);
continue;
}
elseif (pspell_check($pspell_link, $word))
{
$did_you_mean['search'][] = $word;
$did_you_mean['display'][] = $smcFunc['htmlspecialchars']($word);
continue;
}
$suggestions = pspell_suggest($pspell_link, $word);
foreach ($suggestions as $i => $s)
{
// Search is case insensitive.
if ($smcFunc['strtolower']($s) == $smcFunc['strtolower']($word))
unset($suggestions[$i]);
// Plus, don't suggest something the user thinks is rude!
elseif ($suggestions[$i] != censorText($s))
unset($suggestions[$i]);
}
// Anything found? If so, correct it!
if (!empty($suggestions))
{
$suggestions = array_values($suggestions);
$did_you_mean['search'][] = $suggestions[0];
$did_you_mean['display'][] = '<em><strong>' . $smcFunc['htmlspecialchars']($suggestions[0]) . '</strong></em>';
$found_misspelling = true;
}
else
{
$did_you_mean['search'][] = $word;
$did_you_mean['display'][] = $smcFunc['htmlspecialchars']($word);
}
}
if ($found_misspelling)
{
// Don't spell check excluded words, but add them still...
$temp_excluded = array('search' => array(), 'display' => array());
foreach ($excludedWords as $word)
{
if (preg_match('~^\w+$~', $word) == 0)
{
$temp_excluded['search'][] = '-"' . $word . '"';
$temp_excluded['display'][] = '-"' . $smcFunc['htmlspecialchars']($word) . '"';
}
else
{
$temp_excluded['search'][] = '-' . $word;
$temp_excluded['display'][] = '-' . $smcFunc['htmlspecialchars']($word);
}
}
$did_you_mean['search'] = array_merge($did_you_mean['search'], $temp_excluded['search']);
$did_you_mean['display'] = array_merge($did_you_mean['display'], $temp_excluded['display']);
$temp_params = $search_params;
$temp_params['search'] = implode(' ', $did_you_mean['search']);
if (isset($temp_params['brd']))
$temp_params['brd'] = implode(',', $temp_params['brd']);
$context['params'] = array();
foreach ($temp_params as $k => $v)
$context['did_you_mean_params'][] = $k . '|\'|' . $v;
$context['did_you_mean_params'] = base64_encode(implode('|"|', $context['did_you_mean_params']));
$context['did_you_mean'] = implode(' ', $did_you_mean['display']);
}
}
// Let the user adjust the search query, should they wish?
$context['search_params'] = $search_params;
if (isset($context['search_params']['search']))
$context['search_params']['search'] = $smcFunc['htmlspecialchars']($context['search_params']['search']);
if (isset($context['search_params']['userspec']))
$context['search_params']['userspec'] = $smcFunc['htmlspecialchars']($context['search_params']['userspec']);
// Do we have captcha enabled?
if ($user_info['is_guest'] && !empty($modSettings['search_enable_captcha']) && empty($_SESSION['ss_vv_passed']) && (empty($_SESSION['last_ss']) || $_SESSION['last_ss'] != $search_params['search']))
{
// If we come from another search box tone down the error...
if (!isset($_REQUEST['search_vv']))
$context['search_errors']['need_verification_code'] = true;
else
{
require_once($sourcedir . '/Subs-Editor.php');
$verificationOptions = array(
'id' => 'search',
);
$context['require_verification'] = create_control_verification($verificationOptions, true);
if (is_array($context['require_verification']))
{
foreach ($context['require_verification'] as $error)
$context['search_errors'][$error] = true;
}
// Don't keep asking for it - they've proven themselves worthy.
else
$_SESSION['ss_vv_passed'] = true;
}
}
// *** Encode all search params
// All search params have been checked, let's compile them to a single string... made less simple by PHP 4.3.9 and below.
$temp_params = $search_params;
if (isset($temp_params['brd']))
$temp_params['brd'] = implode(',', $temp_params['brd']);
$context['params'] = array();
foreach ($temp_params as $k => $v)
$context['params'][] = $k . '|\'|' . $v;
if (!empty($context['params']))
{
// Due to old IE's 2083 character limit, we have to compress long search strings
$params = @gzcompress(implode('|"|', $context['params']));
// Gzcompress failed, use try non-gz
if (empty($params))
$params = implode('|"|', $context['params']);
// Base64 encode, then replace +/= with uri safe ones that can be reverted
$context['params'] = str_replace(array('+', '/', '='), array('-', '_', '.'), base64_encode($params));
}
// ... and add the links to the link tree.
$context['linktree'][] = array(
'url' => $scripturl . '?action=search;params=' . $context['params'],
'name' => $txt['search']
);
$context['linktree'][] = array(
'url' => $scripturl . '?action=search2;params=' . $context['params'],
'name' => $txt['search_results']
);
// *** A last error check
call_integration_hook('integrate_search_errors');
// One or more search errors? Go back to the first search screen.
if (!empty($context['search_errors']))
{
$_REQUEST['params'] = $context['params'];
return PlushSearch1();
}
// Spam me not, Spam-a-lot?
if (empty($_SESSION['last_ss']) || $_SESSION['last_ss'] != $search_params['search'])
spamProtection('search');
// Store the last search string to allow pages of results to be browsed.
$_SESSION['last_ss'] = $search_params['search'];
// *** Reserve an ID for caching the search results.
$query_params = array_merge($search_params, array(
'min_msg_id' => isset($minMsgID) ? (int) $minMsgID : 0,
'max_msg_id' => isset($maxMsgID) ? (int) $maxMsgID : 0,
'memberlist' => !empty($memberlist) ? $memberlist : array(),
));
// Can this search rely on the API given the parameters?
if ($searchAPI->supportsMethod('searchQuery', $query_params))
{
$participants = array();
$searchArray = array();
$num_results = $searchAPI->searchQuery($query_params, $searchWords, $excludedIndexWords, $participants, $searchArray);
}
// Update the cache if the current search term is not yet cached.
else