PHP添加行时出错

Question

我想在所有行中添加金额。这里是代码。请帮助我。

$tot1=mysql_query("select SUM(Amount) from wp_product_details"); 
while($row1 = mysql_fetch_array($tot1)) 
{ 
echo $row1['Amount']; 
} 

Answer 1

更改查询一点点使用量与$row1[]

$tot1=mysql_query("select SUM(Amount) as Amount from wp_product_details"); 

或更改$row1[]语法

while($row1 = mysql_fetch_array($tot1)) 
{ 
echo $row1['SUM(Amount)']; 
} 

Answer 2

试试这个代码

$tot1=mysql_query("select SUM(Amount) as amount from wp_product_details"); 
    while($row1 = mysql_fetch_array($tot1)) 
    { 
    echo $row1['amount']; 
    }