thinkphp多条件查询怎么写？
比如表user，字段id，name，nickname。现在根据name和adress多条件查询，$name和$nickname，两个条件是或，不是并。怎么写？
另外，如果查询条件为数组的话怎么写？比如$id=array(1,2,3)，查找id为1，2,3的三条数据
1:
$a=M('user);$b=$a->where("name='你的名字' or nickname='你的昵称'")->select();$a=M('user'); $data['id']=array('in',array(1,2,3)); $b=$a->where($data)->select(); 
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