#### 双字段模糊查询
用例：
~~~
if(IS_POST){
$date=I('date_sample');
$keyw=I('keyw');
if($date)$map['date_sample']=$date;
if($keyw){
$where['patient_name'] = array('like', '%'.$keyw.'%');
$where['patient_tel'] = array('like','%'.$keyw.'%');
$where['_logic'] = 'or';
$map['_complex'] = $where;
}
}
~~~
