php+mysql多字段模糊搜索

谁能帮我修改一下这个模糊搜索，我要多字段模糊搜索，帮帮忙

<?php

class SearchAction extends CommonAction{


public function index(){
$lang = $this->lang;
$_msg = ($lang=='c') ? '请输入关键词' : 'Please input the keywords' ;
$template = ($lang=='c') ? 'c_index' : 'e_index' ;


$keyword = I('get.name','','trim');
$rekeyword = ($lang=='c') ? '' : ' ' ;
$keyword = str_replace('+', $rekeyword , $keyword);

//C('URL_MODEL',0);
//if(isset($_GET['p'])) $keyword = str_replace('+', '', $keyword);

if ($keyword=="") {
$this->error($_msg);
}
$where = ($lang=='c') ? " name like '%%%s%%' " : " ename like '%%%s%%' " ;


$db=M('Product');
import('ORG.Util.Page');
$count=$db->where($where,array($keyword))->count();
$page=new Page($count,C('LIST_PRONUM'));
$prevs= ($lang=='c') ? '上一页' : 'Previous' ;
$nexts= ($lang=='c') ? '下一页' : 'Next' ;
$page->setConfig('prev',$prevs);
$page->setConfig('next',$nexts);
$page->setConfig('theme',"%upPage% %linkPage% %downPage%");
$this->page=$page->show();


$this->product=$db->field('id,name,ename,description,edescription,url,thumb')->where($where,array($keyword))->limit($page->firstRow.','.$page->listRows)->select();

$this->pid=M('List')->field('id')->where(array('type'=>'Product','pid'=>0))->limit(1)->order('sort')->find();
$this->keyword=$keyword;
//$urlmodels=require './static.php';
//C('URL_MODEL',$urlmodels['URL_MODEL']);
$this->display($template);
}




}

?>