284 lines
6.9 KiB
PHP
284 lines
6.9 KiB
PHP
<?php
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class Search
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{
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var $terms;
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var $text;
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var $xs;
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var $search;
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var $error;
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var $pager;
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var $count;
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var $related;
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var $corrected;
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var $total;
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var $search_cost;
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var $docs;
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var $hot;
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var $base_url;
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var $expanded;
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//require_once '/home/wlx/xunsearch/sdk/php/lib/XS.php';
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private function safe_query($search)
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{
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return preg_replace('/%|_|\'|\\\\/', '\\\\$0', stripslashes($search));
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}
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function parse_search($search="", $safe = true)
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{
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if (empty($search)) $search=$this->text;
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$temp = array();
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preg_match_all('/"([^"]+)"|([^\\s]+)/', (( $safe ) ? $this->safe_query($search) : $search), $temp);
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for ($i = 1; $i < count($temp); $i++)
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{
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foreach ( $temp[$i] as $value )
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{
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if ( strlen($value) >= 3 )
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{
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$this->terms[] = $value;
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}
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}
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}
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}
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function sql_expr($field)
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{
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$sql=" 1=1 ";
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if (!is_array($field))
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{
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$field=array($field);
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}
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if (!count($this->terms))
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$this->parse_search();
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foreach($this->terms as $t)
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{
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$sql.=" and (1<>1 ";
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foreach($field as $f)
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{
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$sql.=" or ".$f." ilike '%".$t."%' ";
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}
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$sql.=") ";
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}
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return $sql;
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}
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function __construct($text='')
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{
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require_once '/home/wlx/xunsearch/sdk/php/lib/XS.php';
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$this->xs=new XS('westdc');
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$this->search=$this->xs->search;
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$this->terms = array();
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$this->text=$text;
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// other variable maybe used
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$this->count = $this->total = $this->search_cost = 0;
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$this->docs = $this->related = $this->corrected =$this->expanded = $this->hot = array();
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$this->error = $this->pager = $this->base_url='';
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}
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function dosearch()
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{
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//
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// 支持的 GET 参数列表
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// q: 查询语句
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// m: 开启模糊搜索，其值为 yes/no
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// f: 只搜索某个字段，其值为字段名称，要求该字段的索引方式为 self/both
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// s: 排序字段名称及方式，其值形式为：xxx_ASC 或 xxx_DESC
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// p: 显示第几页，每页数量为 XSSearch::PAGE_SIZE 即 10 条
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// ie: 查询语句编码，默认为 UTF-8
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// oe: 输出编码，默认为 UTF-8
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// xml: 是否将搜索结果以 XML 格式输出，其值为 yes/no
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//
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// variables
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$eu = '';
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$__ = array('q', 'm', 'f', 's', 'p', 'ie', 'oe', 'syn', 'xml','east','west','south','north','begin','end');
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foreach ($__ as $_)
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$$_ = isset($_GET[$_]) ? $_GET[$_] : '';
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// recheck request parameters
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$q = get_magic_quotes_gpc() ? stripslashes($q) : $q;
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$f = empty($f) ? '_all' : $f;
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${'m_check'} = ($m == 'yes' ? ' checked' : '');
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${'syn_check'} = ($syn == 'yes' ? ' checked' : '');
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${'f_' . $f} = ' checked';
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${'s_' . $s} = ' selected';
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if (!isset($q)) $q='';
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// base url
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$this->base_url = '/search?q=' . urlencode($q) . '&m=' . $m . '&f=' . $f . '&s=' . $s .'&begin='.$begin.'&end='.$end.'&east='.$east.'&north='.$north.'&west='.$west.'&south='.$south. $eu;
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$total_begin = microtime(true);
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// perform the search
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try
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{
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$this->search->setCharset('UTF-8');
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if (empty($q))
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{
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// just show hot query
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$this->hot = $this->search->getHotQuery();
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}
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else
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{
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// fuzzy search
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$this->search->setFuzzy($m === 'yes');
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// synonym search
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$this->search->setAutoSynonyms($syn === 'yes');
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// set query
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if (!empty($f) && $f != '_all')
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{
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$this->search->setQuery($f . ':(' . $q . ')');
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}
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else
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{
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$this->search->setQuery($q);
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}
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//spatial search
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if (!empty($east) && !empty($west) && !empty($south) && !empty($north))
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{
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$this->search->addRange('east',null,$east);
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$this->search->addRange('west',$west,null);
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$this->search->addRange('south',$south,null);
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$this->search->addRange('north',null,$north);
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}
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//date search
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if (!empty($begin))
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{
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$from=strtotime($begin);
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$this->search->addRange('timebegin',$from,null);
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}
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if (!empty($end))
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{
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$to=strtotime($end);
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$this->search->addRange('timeend',null,$to);
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}
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// set sort
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if (($pos = strrpos($s, '_')) !== false)
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{
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$sf = substr($s, 0, $pos);
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$st = substr($s, $pos + 1);
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$this->search->setSort($sf, $st === 'ASC');
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}
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// set offset, limit
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$p = max(1, intval($p));
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$n = XSSearch::PAGE_SIZE;
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$this->search->setLimit($n, ($p - 1) * $n);
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// get the result
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$search_begin = microtime(true);
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$this->docs = $this->search->search();
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$this->search_cost = microtime(true) - $search_begin;
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// get other result
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$this->count = $this->search->getLastCount();
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$this->total = $this->search->getDbTotal();
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if ($xml !== 'yes')
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{
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if ($this->count<1)
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$this->expanded=$this->search->getExpandedQuery($q);
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// try to corrected, if resul too few
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if ($this->count < 1 || $this->count < ceil(0.001 * $this->total))
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$this->corrected = $this->search->getCorrectedQuery();
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// get related query
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$this->related = $this->search->getRelatedQuery();
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}
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// gen pager
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if ($this->count > $n)
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{
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$pb = max($p - 5, 1);
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$pe = min($pb + 10, ceil($this->count / $n) + 1);
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$this->pager = '';
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do
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{
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$this->pager .= ($pb == $p) ? '<strong>' . $p . '</strong>' : '<a href="' . $this->base_url . '&p=' . $pb . '">[' . $pb . ']</a>';
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}
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while (++$pb < $pe);
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}
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}
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}
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catch (XSException $e)
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{
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$this->error = strval($e);
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}
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// calculate total time cost
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$this->total_cost = microtime(true) - $total_begin;
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// XML OUPUT
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if ($xml === 'yes' && !empty($q))
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{
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header("Content-Type: text/xml; charset=$oe");
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echo "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n";
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echo "<xs:result count=\"$this->count\" total=\"$this->total\" cost=\"$this->total_cost\" xmlns:xs=\"http://www.xunsearch.com\">\n";
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if ($this->error !== '')
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echo " <error><![CDATA[" . $this->error . "]]></error>\n";
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foreach ($this->docs as $doc)
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{
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echo " <doc index=\"" . $doc->rank() . "\" percent=\"" . $doc->percent() . "%\">\n";
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foreach ($doc as $k => $v)
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{
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echo " <$k>";
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if (is_numeric($v))
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echo $v;
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else
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echo "\n <![CDATA[" . $v . "]]>\n ";
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echo "</$k>\n";
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}
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echo " </doc>\n";
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}
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echo "</xs:result>\n";
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exit(0);
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}
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}
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//搜索建议
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function suggest($q)
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{
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$terms = array();
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if (!empty($q) && strpos($q, ':') === false)
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{
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try {
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$terms = $this->search->setCharset('UTF-8')->getExpandedQuery($q);
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} catch (XSException $e) { }
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}
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return json_encode($terms);
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}
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//添加新文档
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//$data: 包含field和value的数组
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function add($data)
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{
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$doc=new XSDocument;
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$index=$this->xs->index;
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$doc->setFields($data);
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$index->add($doc);
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}
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//更新已有文档
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//$data: 包含field和value的数组
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function update($data)
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{
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$doc=new XSDocument;
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$index=$this->xs->index;
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$doc->setFields($data);
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$index->update($doc);
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}
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//根据主键删除对应的索引
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function del($data,$field='')
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{
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$index=$this->xs->index;
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if (empty($field))
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$index->del($data);
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else {
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$index->del($data,$field);
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}
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}
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}
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