Question

我已经更新到PHP 7.1，这个简单的计算现在返回'遇到非正确形成的数值'错误

    $balance = "-16,438.56";
    $amount = "1000.00";

    return $balance-$amount;

我需要帮助知道如何管理它感谢

Answer 1

您需要从$ balance中删除逗号。

$balance = "-16438.56";

Answer 2

您可以将其转换为浮点值。

$balance = -16438.56;
$amount = 1000.00;

echo $balance-$amount;

$ -17438.56

Answer 3

您的余额中有逗号，请先删除逗号。如果您想确定，也可以输入提示。

$balance = str_replace(',','',$balance);
return (float) $balance - (float) $amount;

Answer 4

php的-运算符可以隐式地为浮点数转换为浮点数，但是该转换与千步逗号不兼容，因此请删除逗号，进行计算，然后重新添加逗号经过计算，例如

$balance = "-16,438.56";
$amount = "1000.00";
return number_format ( (( float ) (str_replace ( ",", "", $balance ))) - (( float ) (str_replace ( ",", "", $amount ))), 2, ".", "," );

PHP 7.1货币计算

4 个答案: