php中变量的使用有关问题

WBOY

풀어 주다： 2016-06-13 12:30:06

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php中变量的使用问题
从数据库中获得了各区的销售金额和销售数量，要对数量和金额求和。代码如下：

<br />
<?PHP<br />
	<br />
	ob_start();<br />
	require_once 'DB.php';<br />
	ob_end_clean();<br />
	  $db=DB::Connect();<br />
	$result=$db->QueryLastMonth();<br />
   	$result1=$db->QueryLastMonthByArea();<br />
	 $all_sales_amount;<br />
	$all_sales_money;<br />
	 echo  'begin '.$all_sales_amount;<br />
	while($row1= sybase_fetch_assoc($result1))<br />
	{<br />
  ?><br />
  <tr><br />
                <th data-options="field:'itemid',width:80"><?php <br />
				switch($row1["areacode"]){<br />
				case "E":<br />
				echo "华东区";<br />
				break;<br />
				case "C":<br />
				echo "东北区";<br />
				break;<br />
				case "N":<br />
				echo "华北区";<br />
				break;<br />
				case "W":<br />
				echo "西大区(W)";<br />
				break;<br />
				case "H":<br />
				echo "华中区";<br />
				break;<br />
				case "S":<br />
				echo "华南区";<br />
				break;<br />
				case "F":<br />
				echo "华东区(经销)";<br />
				break;<br />
				case "T":<br />
				echo "西大区(T)";<br />
				break;<br />
				}<br />
				?></th><br />
                <th data-options="field:'productid',width:80"><?php echo $row1["area_salesgoodssum"]?></th><br />
                <th data-options="field:'listprice',width:100,align:'right'"><?php echo $row1["area_salesmoneysum"]?></th><br />
                <th data-options="field:'unitcost',width:80,align:'right'">--</th><br />
                <th data-options="field:'status',width:60,align:'center'">--</th><br />
            </tr><br />
			<br />
	<?php <br />
	 $all_sales_amount+=$row1["area_salesgoodssum"];<br />
	 $all_sales_money+=$row1["area_salesmoney"];<br />
	 echo '循环中数量'.$all_sales_amount."金额".$all_sales_money."<br>";<br />
	 }<br />
	 ?><br />
        </thead><br />
    </table><br />
</div><br />
<br />
<br />
    <div class="easyui-draggable" data-options="handle:'#title'" style="width:220px;height:160px;background:#fafafa;border:1px solid #ccc;margin-top:10px"><br />
        <div id="title" style="padding:5px;background:#ccc;color:#FA0000">销售简报<?php ?></div><br />
		<span>总金额：<?php echo $all_sales_money; ?> </span><br><br />
		<span>总数量：<?php echo  $all_sales_amount?> </span><br />

로그인 후 복사

$all_sales_amount为销售数量，$all_sales_money为销售金额。但运行的结果销售数量计算出的结果是错误的，销售金额总是为0（如下）请问上面的代码出了什么问题？