--- /dev/null
+<?php
+
+/*
+ * Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/)
+ * Copyright (C) 2003-2009 The Nucleus Group
+ *
+ * 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.
+ * (see nucleus/documentation/index.html#license for more info)
+ */
+/**
+ * SEARCH(querystring) offers different functionality to create an
+ * SQL query to find certain items. (and comments)
+ *
+ * based on code by David Altherr:
+ * http://www.evolt.org/article/Boolean_Fulltext_Searching_with_PHP_and_MySQL/18/15665/
+ * http://davidaltherr.net/web/php_functions/boolean/funcs.mysql.boolean.txt
+ *
+ * @license http://nucleuscms.org/license.txt GNU General Public License
+ * @copyright Copyright (C) 2002-2009 The Nucleus Group
+ * @version $Id: SEARCH.php 1556 2011-07-11 14:18:48Z ftruscot $
+ */
+
+
+
+class SEARCH {
+
+ var $querystring;
+ var $marked;
+ var $inclusive;
+ var $blogs;
+
+
+ function SEARCH($text) {
+ global $blogid;
+ $text = preg_replace ("/[<,>,=,?,!,#,^,(,),[,\],:,;,\\\,%]/","",$text);
+ $this->querystring = $text;
+ $this->marked = $this->boolean_mark_atoms($text);
+ $this->inclusive = $this->boolean_inclusive_atoms($text);
+ $this->blogs = array();
+
+ // get all public searchable blogs, no matter what, include the current blog allways.
+ $res = sql_query('SELECT bnumber FROM '.sql_table('blog').' WHERE bincludesearch=1 ');
+ while ($obj = sql_fetch_object($res))
+ $this->blogs[] = intval($obj->bnumber);
+ }
+
+ function boolean_sql_select($match){
+ if (i18n::strlen($this->inclusive) > 0) {
+ /* build sql for determining score for each record */
+ $result=i18n::explode(" ",$this->inclusive);
+ for($cth=0;$cth<count($result);$cth++){
+ if(i18n::strlen($result[$cth])>=4){
+ $stringsum_long .= " $result[$cth] ";
+ }else{
+ $stringsum_a[] = ' '.$this->boolean_sql_select_short($result[$cth],$match).' ';
+ }
+ }
+
+ if(i18n::strlen($stringsum_long)>0){
+ $stringsum_long = sql_real_escape_string($stringsum_long);
+ $stringsum_a[] = " match ($match) against ('$stringsum_long') ";
+ }
+
+ $stringsum .= implode("+",$stringsum_a);
+ return $stringsum;
+ }
+ }
+
+ function boolean_inclusive_atoms($string){
+ $result = trim($string);
+ $result = preg_replace("#([[:space:]]{2,})#", ' ', $result);
+
+ # replaced eregi_replace() below with preg_replace(). ereg* functions are deprecated in PHP 5.3.0
+ # just added delimiters to regex and the 'i' for case-insensitive matching
+
+ /* convert normal boolean operators to shortened syntax */
+ $result = preg_replace('# not #i', ' -', $result);
+ $result = preg_replace('# and #i', ' ', $result);
+ $result = preg_replace('# or #i', ',', $result);
+
+ /* drop unnecessary spaces */
+ $result = str_replace(' ,', ',', $result);
+ $result = str_replace(', ', ',', $result);
+ $result = str_replace('- ', '-', $result);
+ $result = str_replace('+', '', $result);
+
+ /* strip exlusive atoms */
+ $result = preg_replace(
+ "#\-\([A-Za-z0-9]{1,}[A-Za-z0-9\-\.\_\,]{0,}\)#",
+ '',
+ $result);
+
+ $result = str_replace('(', ' ', $result);
+ $result = str_replace(')', ' ', $result);
+ $result = str_replace(',', ' ', $result);
+
+ return $result;
+ }
+
+ function boolean_sql_where($match){
+
+ $result = $this->marked;
+
+ $this->boolean_sql_where_cb1($match); // set the static $match
+
+ $result = preg_replace_callback(
+
+ "/foo\[\(\'([^\)]{4,})\'\)\]bar/",
+
+ array($this,'boolean_sql_where_cb1'),
+
+ $result);
+
+ $this->boolean_sql_where_cb2($match); // set the static $match
+
+ $result = preg_replace_callback(
+
+ "/foo\[\(\'([^\)]{1,3})\'\)\]bar/",
+
+ array($this,'boolean_sql_where_cb2'),
+
+ $result);
+
+ return $result;
+
+ }
+
+ function boolean_sql_where_cb1($matches){
+
+ static $match;
+
+ if (!is_array($matches)) $match=$matches;
+
+ else return ' match ('.$match.') against (\''.sql_real_escape_string($matches[1]).'\') > 0 ';
+
+ }
+
+ function boolean_sql_where_cb2($matches){
+
+ static $match;
+
+ if (!is_array($matches)) $match=$matches;
+
+ else return ' ('.$this->boolean_sql_where_short(sql_real_escape_string($matches[1]),$match).') ';
+
+ }
+
+ function boolean_mark_atoms($string){
+ $result = trim($string);
+ $result = preg_replace("/([[:space:]]{2,})/",' ',$result);
+
+ # replaced eregi_replace() below with preg_replace(). ereg* functions are deprecated in PHP 5.3.0
+ # just added delimiters to regex and the 'i' for case-insensitive matching
+
+ /* convert normal boolean operators to shortened syntax */
+ $result = preg_replace('# not #i', ' -', $result);
+ $result = preg_replace('# and #i', ' ', $result);
+ $result = preg_replace('# or #i', ',', $result);
+
+ /* strip excessive whitespace */
+ $result = str_replace('( ', '(', $result);
+ $result = str_replace(' )', ')', $result);
+ $result = str_replace(', ', ',', $result);
+ $result = str_replace(' ,', ',', $result);
+ $result = str_replace('- ', '-', $result);
+ $result = str_replace('+', '', $result);
+
+ // remove double spaces (we might have introduced some new ones above)
+ $result = trim($result);
+ $result = preg_replace("#([[:space:]]{2,})#", ' ', $result);
+
+ /* apply arbitrary function to all 'word' atoms */
+
+ $result_a = i18n::explode(' ', $result);
+
+ for($word = 0;$word<count($result_a);$word++)
+ {
+ $result_a[$word] = "foo[('" . $result_a[$word] . "')]bar";
+ }
+
+ $result = implode(' ', $result_a);
+
+ /* dispatch ' ' to ' AND ' */
+ $result = str_replace(' ', ' AND ', $result);
+
+ /* dispatch ',' to ' OR ' */
+ $result = str_replace(',', ' OR ', $result);
+
+ /* dispatch '-' to ' NOT ' */
+ $result = str_replace(' -', ' NOT ', $result);
+ return $result;
+ }
+
+ function boolean_sql_where_short($string,$match){
+ $match_a = i18n::explode(',',$match);
+ for($ith=0;$ith<count($match_a);$ith++){
+ $like_a[$ith] = " $match_a[$ith] LIKE '% $string %' ";
+ }
+ $like = implode(" OR ",$like_a);
+
+ return $like;
+ }
+ function boolean_sql_select_short($string,$match){
+ $match_a = i18n::explode(',',$match);
+ $score_unit_weight = .2;
+ for($ith=0;$ith<count($match_a);$ith++){
+ $score_a[$ith] =
+ " $score_unit_weight*(
+ LENGTH(" . sql_real_escape_string($match_a[$ith]) . ") -
+ LENGTH(REPLACE(LOWER(" . sql_real_escape_string($match_a[$ith]) . "),LOWER('" . sql_real_escape_string($string) . "'),'')))
+ /LENGTH('" . sql_real_escape_string($string) . "') ";
+ }
+ $score = implode(" + ",$score_a);
+
+ return $score;
+ }
+}
+?>
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