我从数组中得到了表格，并为不同的日期获得了许多金额$$$。
示例：
-2015年10月8日|金额：2500美元
-2015年10月19日|金额：1000美元
-2015年11月20日|金额：500美元
-2015年11月27日|金额：720$
-2015年12月30日|金额：100美元
-2015年12月31日|金额：250美元
我在smarty模板中的当前代码是：
{foreach from=$referrals item=referral}
{if $referral.date eq "08/10/2015"}
{assign var="sum" value="`$sum+$referral.amount`"}
{/if}
{/foreach}
<td>{$sum|number_format:2:",":"."} ден.</td>
{assign var="sum" value=0}
我只得到日期的总金额：2015年10月8日
我的问题是如何获得整个月（10）10月、整个月（11）11月和全年的总金额（以月为单位），并且只针对不为0（零）的金额，因为我也有这种金额？
这是我的数组（包含超过136个数组）：
Smarty_Variable Object (3)
->value = Array (137)
0 => Array (11)
id => "1514"
date => "05/01/2016"
service => "Рамка со податоци"
package => "Рамка со податоци"
userid => "500"
amount => "0.00"
billingcycle => "One Time"
amountdesc => "0,00 ден. One Time"
commission => "0,00 ден."
lastpaid => "Never"
status => "Active"
1 => Array (11)
id => "1515"
date => "05/01/2016"
service => "Лого со податоци"
package => "Лого со податоци"
userid => "500"
amount => "0.00"
billingcycle => "One Time"
amountdesc => "0,00 ден. One Time"
commission => "0,00 ден."
lastpaid => "Never"
status => "Active"
2 => Array (11)
id => "1496"
date => "29/12/2015"
service => "Рамка со податоци"
package => "Рамка со податоци"
userid => "493"
amount => "0.00"
billingcycle => "One Time"
amountdesc => "0,00 ден. One Time"
commission => "0,00 ден."
lastpaid => "Never"
status => "Active"
3 => Array (11)
id => "1497"
date => "29/12/2015"
service => "Лого со податоци"
package => "Лого со податоци"
userid => "493"
amount => "0.00"
billingcycle => "One Time"
amountdesc => "0,00 ден. One Time"
commission => "0,00 ден."
lastpaid => "Never"
status => "Active"
4 => Array (11)
id => "1498"
date => "29/12/2015"
service => "Реклама во црно-бела техника на 1/6 -..."
package => "Реклама во црно-бела техника на 1/6 -..."
userid => "493"
amount => "0.00"
billingcycle => "One Time"
amountdesc => "0,00 ден. One Time"
commission => "0,00 ден."
lastpaid => "Never"
status => "Active"
5 => Array (11)
id => "1500"
date => "29/12/2015"
service => "Лого и мапа на www.abv.mk"
package => "Лого и мапа на www.abv.mk"
userid => "493"
amount => "0.00"
billingcycle => "One Time"
amountdesc => "0,00 ден. One Time"
commission => "0,00 ден."
lastpaid => "Never"
status => "Active"
*//sum for october month*
{assign var="sum" value=0}
{foreach from=$referrals item=referral}
{if $referral.date|date_format:"%m" == 10 && $referral.amount != 0}
{assign var="sum" value=$sum+$referral.amount}
{/if}
{/foreach}
*//display sum*
{$sum|number_format:2:",":"."}