ThinkPHP“邏輯或”關係的多條件查詢

thinkPHP連貫操作時，有時會用到多個條件的查詢。thinkPHP默認條件下的多條件查詢的邏輯關係是"與"。
以下是邏輯"或"的示例代碼
$where['count1'] = $count1;

$where1['count1'] = $count1;
$where2['count2'] = $count2;
$data = $demoModel->where(array($where1,$where2,'_logic'=>'or'))->select();