php实现搜索类封装示例

<?php
/**
 * soclass.php
 * 索引与搜索类 */
 
class soclass {
 
  private $_xindex;
 
  private $_xsearch;
 
  private $_project;
 
  public function __construct($project){
 
    //载入引导文件
    require_once 'lib/xs.php';
    //初始化
    $xs = new xs($project); 
    $this->_project = $project;
    $this->_xindex = $xs->index; 
    $this->_xsearch = $xs->search;
    $this->_xsearch->setcharset('utf-8');
  }
 
  public function query($keyword,$row=20,$jnum=0){
 
    $xs = new xs($this->_project);
    $xs->search->setfuzzy();
    $xs->search->setautosynonyms();
    $xs->search->setquery($keyword); //支持同义词搜索，默认打开
    $xs->search->setlimit($row, $jnum); //设置返回结果最多为 5 条，并跳过前 10 条
    $docs = $xs->search->search(); //执行搜索，将搜索结果文档保存在 $docs 数组中    
    $count = $xs->search->count(); //获取搜索结果的匹配总数估算值
    if($count){
      $data = array();
      foreach ($docs as $key=>$doc){
        $data[$key]['pid'] = $doc->pid;
        $data[$key]['nid'] = $doc->nid;
        $data[$key]['category'] = $doc->category;
        $data[$key]['url'] = $doc->url;
        $data[$key]['name'] = $xs->search->highlight(htmlspecialchars($doc->name));
        $data[$key]['message'] = $xs->search->highlight(htmlspecialchars($doc->message));
      }
 
      return array('data'=>$data,'count'=>$count);
    }
    return array();
  }
 
  public function hotword($num,$type='lastnum'){
 
    return $this->_xsearch->gethotquery($num,$type);
  }
 
  public function expanded($keyword){
 
    return $this->_xsearch->getexpandedquery($keyword);
  }
 
  public function lastcount(){
 
    return $this->_xsearch->getlastcount();
  }
 
  public function index($data,$update=0){
 
    // 创建文档对象
    $doc = new xsdocument;
    $doc->setfields($data);
 
    // 添加或更新到索引数据库中
    if(!$update){
      $this->_xindex->add($doc);
    }else{
      $this->_xindex->update($doc);
    }
  }
 
  public function delete($idarray){
 
    //删除索引(主键删除array('1','2','3'))
    $this->_xindex->del($idarray); 
  }
 
  public function addsynonym($word1,$word2){
 
    $this->_xindex->addsynonym($word1,$word2);
  }
 
  public function clearindex(){
 
    $this->_xindex->clean();
  }
 
}
 
?>