$where['title'] = array(['like', "%bh%"],['like',"%nk%",'or');
$data=M('news')
->field('id,title,keyword')
->where($where)
->order('add_time DESC')
->select();
$where['title'] = array(['like', "%bh%"],['like',"%nk%",'or');
$data=M('news')
->field('id,title,keyword')
->where($where)
->order('add_time DESC')
->select();