PHP redis实现超迷你全文检索

//自动补全
  //不限输入汉字的前后顺序: 输入"国三杀" => 输出 "三国杀"
  function getAutoComplate()
  {
    //$word = $this->input->post('word');
    $word = '三国';
    if (empty($word)) {
      exit('0');
    }
    $intWordLength = mb_strlen($word, 'UTF-8');

    $this->load->library('iredis');
    if (1 == $intWordLength) {
      $arrGid = $this->iredis->getAutoComplate($word);
    } else {
      $arrGid = array();
      for ($i=0; $i < $intWordLength; $i++) {
        $strOne = mb_substr($word, $i, 1, 'UTF-8');
        $arrGidTmp = $this->iredis->getAutoComplate($strOne);
        $arrGid = empty($arrGid) ? $arrGidTmp : array_intersect($arrGid, $arrGidTmp); //求交集,因为传入的参数个数不确定,因此不能直接求交集
      }
    }

    $arrGame = $this->gamemodel->getGameNameForAutoComplate($arrGid);
    // var_dump($arrGame);exit;
    $jsonGame = json_encode($arrGame);
    exit($jsonGame);
  }

  //自动补全, 建立索引
  function setAutoComplate()
  {
    $arrGame = $this->gamemodel->getAllGameNameForAutoComplate();
    $arrIndex = array();
    foreach ($arrGame as $gid => $gname) {
      $intGnameLength = mb_strlen($gname, 'UTF-8');
      for ($i=0; $i < $intGnameLength; $i++) {
        $strOne = mb_substr($gname, $i, 1, 'UTF-8');
        $arrIndex[$strOne][] = $gid;
      }
    }
    
    $this->load->library('iredis');
    foreach ($arrIndex as $word => $arrGid) {
      foreach ($arrGid as $gid) {
        $this->iredis->setAutoComplate($word, $gid);
      }
    }
    
  }

//自动补全功能
  public function setAutoComplate($key, $value)
  {
    $youxikey = 'youxi_'.$key;
    $this->sAdd($youxikey, $value);
  }

  //自动补全功能
  public function getAutoComplate($key)
  {
    $youxikey = 'youxi_'.$key;
    return $this->sMembers($youxikey);
  }