我正在尝试获取包含数字的变量的总数,有些可能是小数。我需要将其保留到小数点后两位,并且正在使用 number_format() 函数。
$total = $order->order->net+$order->order->deductions+$order->order->vat+$order->order->postage+$order->order->postage_tax;
echo number_format((float)$total, 2, '.', '');?>
我注意到以下值加起来不正确,似乎忽略了小数。总数应该是 118.50,但我得到的是 118.00。
100+0+17.5+1+0
我对此进行了研究并发现了以下内容
http://floating-point-gui.de/basic/
我对此有点困惑。谁能解释我需要做什么?
*编辑 下面是 $order 变量的转储,显示了我要加起来的数字。您可以看到 17.5 是 17.5 而不是 17。是不是因为它们被指定为字符串?
object(SimpleXMLElement)#12 (21) { ["id"]=> string(6) "922704" ["shopkeeper_orderno"]=> string(4) "1001" ["customer"]=> string(6) "797893" ["creationdate"]=> string(16) "29-05-2012 11:55" ["net"]=> string(3) "100" ["vat"]=> string(4) "17.5" ["status"]=> string(1) "1" ["isnew"]=> string(1) "0" ["deductions"]=> string(1) "0" ["postage"]=> string(1) "1" ["paymentmethod"]=> string(20) "PayPal " ["instructions"]=> object(SimpleXMLElement)#17 (0) { } [2]=> object(SimpleXMLElement)#22 (1) { ["items"]=> object(SimpleXMLElement)#30 (9) { ["id"]=> string(7) "1384486" ["headerID"]=> string(6) "922704" ["productID"]=> string(7) "4959678" ["description"]=> string(13) "Wedding dress" ["net"]=> string(3) "100" ["vat"]=> string(4) "17.5" ["qty"]=> string(1) "1" ["formID"]=> string(2) "-1" ["options"]=> object(SimpleXMLElement)#31 (1) { ["options"]=> array(2) { [0]=> object(SimpleXMLElement)#32 (6) { ["id"]=> string(6) "519981" ["orderDetailsID"]=> string(7) "1384486" ["optionid"]=> string(6) "646934" ["optionCost"]=> string(1) "0" ["optionVAT"]=> string(1) "0" ["customText"]=> string(9) "size : 12" } [1]=> object(SimpleXMLElement)#33 (6) { ["id"]=> string(6) "519982" ["orderDetailsID"]=> string(7) "1384486" ["optionid"]=> string(6) "647285" ["optionCost"]=> string(1) "0" ["optionVAT"]=> string(1) "0" ["customText"]=> string(14) "Colour : Ivory" } } } } } } ["postage_tax"]=> string(1) "0" ["dispatched"]=> string(1) "0" ["paybyotherid"]=> string(2) "-1" ["wheredidyouhearid"]=> string(2) "-1"
}