$where['username'] = $keywords;
$where['nickname'] = $keywords;
$Model->where($where)->select();如果按以上写法，则是and，会搜不到东西。我想实现：
select * from table where username=$keywords or nickname = $keywords 最佳答案
我想实现：
$where['username'] = $keywords;
$where['nickname'] = $keywords;
$Model->where($where)->select();如果按以上写法，则是and，会搜不到东西。select * from table where username=$keywords or nickname = $keywords