[英]not showing value returned from database
我正在從表中獲取某列的總和,查詢是正確的,但是當我嘗試顯示在表中時它顯示為零。 以下是我的DAO
public function getTotal_paid($id)
{
$dbHandler = new dbConfig();
$query="select SUM(payed) from itemsale where custId = $id";
$results = $dbHandler->Query($query);
return $results;
} // End-Function
以下是我的邏輯
public function getTotal_paid($id)
{
$objDAO = new itemsaleDAO();
$results = $objDAO->getTotal_paid($id);
return $results;
} // End-Function
這是我的前端頁面
<table cellpadding="0" cellspacing="0" border="1" align="right">
<tr><th style="height:10px" class="heading_text">Total Paid</th><th style="height:10px width:10px" class="heading_text">Total Remaining</th></tr>
<?
include_once($commonLocation.'Logic/itemSaleLogic.php');
$var= new itemSale();
$object= new itemSaleLogic();
$object1= array();
$object1[0]= new stdClass;
$object1[0]->custId = $_GET['id'];
$var->payed=$object->getTotal_paid($object1[0]);
//$var->remaining=$object->getTotal_rem(6);
echo $var->payed;
echo "<tr><td class=\"inner_text\">".$var->payed."</td>";
//echo "<td class=\"inner_text\">".$var->remaining."</td></tr>";
?>
</table>
$ var-> payed對象顯示為零(忽略payed的拼寫)
這不會精簡嗎? 好像您是在以奇怪的方式來上課。 未經檢查或測試,但作為改進示例:
班級銷售:
public function getTotal_paid($id)
{
global $dbHandler; // important! this pulls your DB object in..
$query="select SUM(payed) as itemSum from itemsale where custId = $id"; // note query change here!
$results = $dbHandler->Query($query);
return $results;
}
前端頁面
include_once($commonLocation.'Logic/itemSaleLogic.php');
$dbHandler = new dbConfig(); // make sure you have your DB object...
$var= new itemSale();
$var->getTotal_paid(intval($_GET['id']));
var_dump($var); // for debug
echo $var->itemSum; // to output your sum.. do with what you want!
?>
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