mirror of
https://github.com/moodle/moodle.git
synced 2025-01-19 14:27:22 +01:00
298 lines
8.9 KiB
PHP
298 lines
8.9 KiB
PHP
<?php
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/**
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* The query page - accepts a user-entered query string and returns results.
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*
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* Queries are boolean-aware, e.g.:
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*
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* '+' term required
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* '-' term must not be present
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* '' (no modifier) term's presence increases rank, but isn't required
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* 'field:' search this field
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*
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* Examples:
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*
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* 'earthquake +author:michael'
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* Searches for documents written by 'michael' that contain 'earthquake'
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*
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* 'earthquake +doctype:wiki'
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* Search all wiki pages for 'earthquake'
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*
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* '+author:helen +author:foster'
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* All articles written by Helen Foster
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*
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*/
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require_once('../config.php');
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require_once("$CFG->dirroot/search/lib.php");
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if ($CFG->forcelogin) {
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require_login();
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}
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if (empty($CFG->enableglobalsearch)) {
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error('Global searching is not enabled.');
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}
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$adv = new Object();
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//check for php5, but don't die yet (see line 52)
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if ($check = search_check_php5()) {
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require_once("$CFG->dirroot/search/querylib.php");
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$page_number = optional_param('page', -1, PARAM_INT);
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$pages = ($page_number == -1) ? false : true;
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$advanced = (optional_param('a', '0', PARAM_INT) == '1') ? true : false;
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$query_string = optional_param('query_string', '', PARAM_CLEAN);
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if ($pages && isset($_SESSION['search_advanced_query'])) {
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//if both are set, then we are busy browsing through the result pages of an advanced query
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$adv = unserialize($_SESSION['search_advanced_query']);
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} else if ($advanced) {
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//otherwise we are dealing with a new advanced query
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unset($_SESSION['search_advanced_query']);
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session_unregister('search_advanced_query');
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//chars to strip from strings (whitespace)
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$chars = " \t\n\r\0\x0B,-+";
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//retrieve advanced query variables
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$adv->mustappear = trim(optional_param('mustappear', '', PARAM_CLEAN), $chars);
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$adv->notappear = trim(optional_param('notappear', '', PARAM_CLEAN), $chars);
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$adv->canappear = trim(optional_param('canappear', '', PARAM_CLEAN), $chars);
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$adv->module = optional_param('module', '', PARAM_CLEAN);
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$adv->title = trim(optional_param('title', '', PARAM_CLEAN), $chars);
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$adv->author = trim(optional_param('author', '', PARAM_CLEAN), $chars);
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} //else
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if ($advanced) {
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//parse the advanced variables into a query string
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//TODO: move out to external query class (QueryParse?)
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$query_string = '';
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//get all available module types
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$module_types = array_merge(array('All'), array_values(search_get_document_types()));
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$adv->module = in_array($adv->module, $module_types) ? $adv->module : 'All';
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//convert '1 2' into '+1 +2' for required words field
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if (strlen(trim($adv->mustappear)) > 0) {
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$query_string = ' +'.implode(' +', preg_split("/[\s,;]+/", $adv->mustappear));
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} //if
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//convert '1 2' into '-1 -2' for not wanted words field
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if (strlen(trim($adv->notappear)) > 0) {
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$query_string .= ' -'.implode(' -', preg_split("/[\s,;]+/", $adv->notappear));
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} //if
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//this field is left untouched, apart from whitespace being stripped
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if (strlen(trim($adv->canappear)) > 0) {
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$query_string .= ' '.implode(' ', preg_split("/[\s,;]+/", $adv->canappear));
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} //if
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//add module restriction
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if ($adv->module != 'All') {
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$query_string .= ' +doctype:'.$adv->module;
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} //if
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//create title search string
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if (strlen(trim($adv->title)) > 0) {
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$query_string .= ' +title:'.implode(' +title:', preg_split("/[\s,;]+/", $adv->title));
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} //if
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//create author search string
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if (strlen(trim($adv->author)) > 0) {
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$query_string .= ' +author:'.implode(' +author:', preg_split("/[\s,;]+/", $adv->author));
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} //if
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//save our options if the query is valid
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if (!empty($query_string)) {
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$_SESSION['search_advanced_query'] = serialize($adv);
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} //if
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} //if
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//normalise page number
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if ($page_number < 1) {
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$page_number = 1;
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} //if
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//run the query against the index
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$sq = new SearchQuery($query_string, $page_number, 10, false);
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} //if
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if (!$site = get_site()) {
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redirect("index.php");
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} //if
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$strsearch = "Search"; //get_string();
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$strquery = "Enter your search query"; //get_string();
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print_header("$site->shortname: $strsearch: $strquery", "$site->fullname",
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"<a href=\"index.php\">$strsearch</a> -> $strquery");
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//keep things pretty, even if php5 isn't available
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if (!$check) {
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print_heading(search_check_php5(true));
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print_footer();
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exit(0);
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} //if
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print_simple_box_start('center', '100%', '', 20);
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print_heading($strquery);
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print_simple_box_start('center', '', '', 20);
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$vars = get_object_vars($adv);
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if (isset($vars)) {
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foreach ($vars as $key => $value) {
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$adv->$key = stripslashes(htmlentities($value));
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} //foreach
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}
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?>
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<form id="query" method="get" action="query.php">
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<?php if (!$advanced) { ?>
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<input type="text" name="query_string" length="50" value="<?php print stripslashes(htmlentities($query_string)) ?>" />
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<input type="submit" value="Search" />
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<a href="query.php?a=1">Advanced search</a> |
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<a href="stats.php">Statistics</a>
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<?php } else {
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print_simple_box_start('center', '', 'white', 10);
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?>
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<input type="hidden" name="a" value="<?php print $advanced; ?>"/>
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<table border="0" cellpadding="3" cellspacing="3">
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<tr>
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<td width="240">These words must appear:</td>
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<td><input type="text" name="mustappear" length="50" value="<?php print $adv->mustappear; ?>" /></td>
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</tr>
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<tr>
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<td>These words must not appear:</td>
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<td><input type="text" name="notappear" length="50" value="<?php print $adv->notappear; ?>" /></td>
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</tr>
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<tr>
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<td>These words help improve rank:</td>
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<td><input type="text" name="canappear" length="50" value="<?php print $adv->canappear; ?>" /></td>
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</tr>
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<tr>
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<td>Which modules to search?:</td>
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<td>
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<select name="module">
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<?php foreach($module_types as $mod) {
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if ($mod == $adv->module) {
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print "<option value='$mod' selected>$mod</option>\n";
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} else {
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print "<option value='$mod'>$mod</option>\n";
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} //else
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} ?>
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</select>
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</td>
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</tr>
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<tr>
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<td>Words in title:</td>
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<td><input type="text" name="title" length="50" value="<?php print $adv->title; ?>" /></td>
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</tr>
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<tr>
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<td>Author name:</td>
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<td><input type="text" name="author" length="50" value="<?php print $adv->author; ?>" /></td>
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</tr>
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<tr>
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<td colspan="3" align="center"><br /><input type="submit" value="Search" /></td>
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</tr>
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<tr>
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<td colspan="3" align="center">
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<table border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td><a href="query.php">Normal search</a> |</td>
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<td> <a href="stats.php">Statistics</a></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<?php
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print_simple_box_end();
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} //if
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?>
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</form>
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<br/>
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<?php
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print '<div align="center">';
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print 'Searching: ';
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if ($sq->is_valid_index()) {
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//use cached variable to show up-to-date index size (takes deletions into account)
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print $CFG->search_index_size;
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} else {
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print "0";
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} //else
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print ' documents.';
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if (!$sq->is_valid_index() and isadmin()) {
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print "<p>Admin: There appears to be no search index. Please <a href='indexersplash.php'>create an index</a>.</p>\n";
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} //if
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print '</div>';
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print_simple_box_end();
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if ($sq->is_valid()) {
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print_simple_box_start('center', '50%', 'white', 10);
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search_stopwatch();
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$hit_count = $sq->count();
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print "<br />";
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print $hit_count." results returned for '".stripslashes($query_string)."'.";
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print "<br />";
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if ($hit_count > 0) {
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$page_links = $sq->page_numbers();
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$hits = $sq->results();
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if ($advanced) {
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//if in advanced mode, search options are saved in the session, so
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//we can remove the query string var from the page links, and replace
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//it with a=1 (Advanced = on) instead
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$page_links = preg_replace("/query_string=[^&]+/", 'a=1', $page_links);
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} //if
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print "<ol>";
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foreach ($hits as $listing) {
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print "<li value='".($listing->number+1)."'><a href='".$listing->url."'>$listing->title</a><br />\n"
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."<em>".search_shorten_url($listing->url, 70)."</em><br />\n"
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."Type: ".$listing->doctype.", score: ".round($listing->score, 3).", author: ".$listing->author."\n"
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."</li>\n";
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} //for
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print "</ol>";
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print $page_links;
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} //if
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print_simple_box_end();
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?>
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<div align="center">
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It took <?php search_stopwatch(); ?> to fetch these results.
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</div>
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<?php
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} //if (sq is valid)
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print_simple_box_end();
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print_footer();
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?>
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