search/query.php

   1 <?php
   2   /**
   3    * The query page - accepts a user-entered query string and returns results.
   4    *
   5    * Queries are boolean-aware, e.g.:
   6    *
   7    * '+'      term required
   8    * '-'      term must not be present
   9    * ''       (no modifier) term's presence increases rank, but isn't required
  10    * 'field:' search this field
  11    *
  12    * Examples:
  13    *
  14    * 'earthquake +author:michael'
  15    *   Searches for documents written by 'michael' that contain 'earthquake'
  16    *
  17    * 'earthquake +doctype:wiki'
  18    *   Search all wiki pages for 'earthquake'
  19    *
  20    * '+author:helen +author:foster'
  21    *   All articles written by Helen Foster
  22    *
  23    */
  24
  25   require_once('../config.php');
  26   require_once("$CFG->dirroot/search/lib.php");
  27
  28   if ($CFG->forcelogin) {
  29     require_login();
  30   }
  31
  32   if (empty($CFG->enableglobalsearch)) {
  33     error('Global searching is not enabled.');
  34   }
  35
  36   $adv = new Object();
  37
  38   //check for php5, but don't die yet (see line 52)
  39   if ($check = search_check_php5()) {
  40     require_once("$CFG->dirroot/search/querylib.php");
  41
  42     $page_number  = optional_param('page', -1, PARAM_INT);
  43     $pages        = ($page_number == -1) ? false : true;
  44     $advanced     = (optional_param('a', '0', PARAM_INT) == '1') ? true : false;
  45     $query_string = optional_param('query_string', '', PARAM_CLEAN);
  46
  47     if ($pages && isset($_SESSION['search_advanced_query'])) {
  48       //if both are set, then we are busy browsing through the result pages of an advanced query
  49       $adv = unserialize($_SESSION['search_advanced_query']);
  50     } else if ($advanced) {
  51       //otherwise we are dealing with a new advanced query
  52       unset($_SESSION['search_advanced_query']);
  53       session_unregister('search_advanced_query');
  54
  55       //chars to strip from strings (whitespace)
  56       $chars = " \t\n\r\0\x0B,-+";
  57
  58       //retrieve advanced query variables
  59       $adv->mustappear  = trim(optional_param('mustappear', '', PARAM_CLEAN), $chars);
  60       $adv->notappear   = trim(optional_param('notappear', '', PARAM_CLEAN), $chars);
  61       $adv->canappear   = trim(optional_param('canappear', '', PARAM_CLEAN), $chars);
  62       $adv->module      = optional_param('module', '', PARAM_CLEAN);
  63       $adv->title       = trim(optional_param('title', '', PARAM_CLEAN), $chars);
  64       $adv->author      = trim(optional_param('author', '', PARAM_CLEAN), $chars);
  65     } //else
  66
  67     if ($advanced) {
  68       //parse the advanced variables into a query string
  69       //TODO: move out to external query class (QueryParse?)
  70
  71       $query_string = '';
  72
  73       //get all available module types
  74       $module_types = array_merge(array('All'), array_values(search_get_document_types()));
  75       $adv->module = in_array($adv->module, $module_types) ? $adv->module : 'All';
  76
  77       //convert '1 2' into '+1 +2' for required words field
  78       if (strlen(trim($adv->mustappear)) > 0) {
  79         $query_string  = ' +'.implode(' +', preg_split("/[\s,;]+/", $adv->mustappear));
  80       } //if
  81
  82       //convert '1 2' into '-1 -2' for not wanted words field
  83       if (strlen(trim($adv->notappear)) > 0) {
  84         $query_string .= ' -'.implode(' -', preg_split("/[\s,;]+/", $adv->notappear));
  85       } //if
  86
  87       //this field is left untouched, apart from whitespace being stripped
  88       if (strlen(trim($adv->canappear)) > 0) {
  89         $query_string .= ' '.implode(' ', preg_split("/[\s,;]+/", $adv->canappear));
  90       } //if
  91
  92       //add module restriction
  93       if ($adv->module != 'All') {
  94         $query_string .= ' +doctype:'.$adv->module;
  95       } //if
  96
  97       //create title search string
  98       if (strlen(trim($adv->title)) > 0) {
  99         $query_string .= ' +title:'.implode(' +title:', preg_split("/[\s,;]+/", $adv->title));
 100       } //if
 101
 102       //create author search string
 103       if (strlen(trim($adv->author)) > 0) {
 104         $query_string .= ' +author:'.implode(' +author:', preg_split("/[\s,;]+/", $adv->author));
 105       } //if
 106
 107       //save our options if the query is valid
 108       if (!empty($query_string)) {
 109         $_SESSION['search_advanced_query'] = serialize($adv);
 110       } //if
 111     } //if
 112
 113     //normalise page number
 114     if ($page_number < 1) {
 115       $page_number = 1;
 116     } //if
 117
 118     //run the query against the index
 119     $sq = new SearchQuery($query_string, $page_number, 10, false);
 120   } //if
 121
 122   if (!$site = get_site()) {
 123     redirect("index.php");
 124   } //if
 125
 126   $strsearch = "Search"; //get_string();
 127   $strquery  = "Enter your search query"; //get_string();
 128
 129   print_header("$site->shortname: $strsearch: $strquery", "$site->fullname",
 130                "<a href=\"index.php\">$strsearch</a> -> $strquery");
 131
 132   //keep things pretty, even if php5 isn't available
 133   if (!$check) {
 134     print_heading(search_check_php5(true));
 135     print_footer();
 136     exit(0);
 137   } //if
 138
 139   print_simple_box_start('center', '100%', '', 20);
 140   print_heading($strquery);
 141
 142   print_simple_box_start('center', '', '', 20);
 143
 144   $vars = get_object_vars($adv);
 145
 146   if (isset($vars)) {
 147     foreach ($vars as $key => $value) {
 148       $adv->$key = stripslashes(htmlentities($value));
 149     } //foreach
 150   }
 151 ?>
 152
 153 <form name="query" method="get" action="query.php">
 154   <?php if (!$advanced) { ?>
 155     <input type="text" name="query_string" length="50" value="<?php print stripslashes(htmlentities($query_string)) ?>" />
 156     &nbsp;<input type="submit" value="Search" /> &nbsp;
 157     <a href="query.php?a=1">Advanced search</a> |
 158     <a href="stats.php">Statistics</a>
 159   <?php } else {
 160     print_simple_box_start('center', '', 'white', 10);
 161   ?>
 162     <input type="hidden" name="a" value="<?php print $advanced; ?>"/>
 163
 164     <table border="0" cellpadding="3" cellspacing="3">
 165
 166     <tr>
 167       <td width="240">These words must appear:</td>
 168       <td><input type="text" name="mustappear" length="50" value="<?php print $adv->mustappear; ?>" /></td>
 169     </tr>
 170
 171     <tr>
 172       <td>These words must not appear:</td>
 173       <td><input type="text" name="notappear" length="50" value="<?php print $adv->notappear; ?>" /></td>
 174     </tr>
 175
 176     <tr>
 177       <td>These words help improve rank:</td>
 178       <td><input type="text" name="canappear" length="50" value="<?php print $adv->canappear; ?>" /></td>
 179     </tr>
 180
 181     <tr>
 182       <td>Which modules to search?:</td>
 183       <td>
 184         <select name="module">
 185           <?php foreach($module_types as $mod) {
 186             if ($mod == $adv->module) {
 187               print "<option value='$mod' selected>$mod</option>\n";
 188             } else {
 189               print "<option value='$mod'>$mod</option>\n";
 190             } //else
 191           } ?>
 192         </select>
 193       </td>
 194     </tr>
 195
 196     <tr>
 197       <td>Words in title:</td>
 198       <td><input type="text" name="title" length="50" value="<?php print $adv->title; ?>" /></td>
 199     </tr>
 200
 201     <tr>
 202       <td>Author name:</td>
 203       <td><input type="text" name="author" length="50" value="<?php print $adv->author; ?>" /></td>
 204     </tr>
 205
 206     <tr>
 207       <td colspan="3" align="center"><br /><input type="submit" value="Search" /></td>
 208     </tr>
 209
 210     <tr>
 211       <td colspan="3" align="center">
 212         <table border="0" cellpadding="0" cellspacing="0">
 213           <tr>
 214             <td><a href="query.php">Normal search</a> |</td>
 215             <td>&nbsp;<a href="stats.php">Statistics</a></td>
 216           </tr>
 217         </table>
 218       </td>
 219     </tr>
 220     </table>
 221   <?php
 222     print_simple_box_end();
 223   } //if
 224   ?>
 225 </form>
 226
 227 <br>
 228
 229 <?php
 230
 231   print '<div align="center">';
 232   print 'Searching: ';
 233
 234   if ($sq->is_valid_index()) {
 235     //use cached variable to show up-to-date index size (takes deletions into account)
 236     print $CFG->search_index_size;
 237   } else {
 238     print "0";
 239   } //else
 240
 241   print ' documents.';
 242
 243   if (!$sq->is_valid_index() and isadmin()) {
 244     print "<p>Admin: There appears to be no search index. Please <a href='indexersplash.php'>create an index</a>.</p>\n";
 245   } //if
 246
 247   print '</div>';
 248
 249   print_simple_box_end();
 250
 251   if ($sq->is_valid()) {
 252     print_simple_box_start('center', '50%', 'white', 10);
 253
 254     search_stopwatch();
 255     $hit_count = $sq->count();
 256
 257     print "<br />";
 258
 259     print $hit_count." results returned for '".stripslashes($query_string)."'.";
 260     print "<br />";
 261
 262     if ($hit_count > 0) {
 263       $page_links = $sq->page_numbers();
 264       $hits       = $sq->results();
 265
 266       if ($advanced) {
 267         //if in advanced mode, search options are saved in the session, so
 268         //we can remove the query string var from the page links, and replace
 269         //it with a=1 (Advanced = on) instead
 270         $page_links = preg_replace("/query_string=[^&]+/", 'a=1', $page_links);
 271       } //if
 272
 273       print "<ol>";
 274
 275       foreach ($hits as $listing) {
 276         print "<li value='".($listing->number+1)."'><a href='".$listing->url."'>$listing->title</a><br />\n"
 277              ."<em>".search_shorten_url($listing->url, 70)."</em><br />\n"
 278              ."Type: ".$listing->doctype.", score: ".round($listing->score, 3).", author: ".$listing->author."\n"
 279              ."</li>\n";
 280       } //for
 281
 282       print "</ol>";
 283       print $page_links;
 284     } //if
 285
 286     print_simple_box_end();
 287 ?>
 288
 289 <div align="center">
 290   It took <?php search_stopwatch(); ?> to fetch these results.
 291 </div>
 292
 293 <?php
 294   } //if (sq is valid)
 295
 296   print_simple_box_end();
 297   print_footer();
 298 ?>