number_format()导致错误“遇到格式错误的数值". [英] number_format() causes error "A non well formed numeric value encountered"

问题描述

我正在使用number_format将浮点数舍入到仅2个十进制数字.问题是我的某些输入开头没有超过2个小数位.所以代码:

I am using number_format to round floats to only 2 decimal digits. The problem is that some of my inputs don't have more than 2 decimals digits to begin with. So the code:

number_format($value, 2)

在没有足够的十进制数字的情况下，如果不是和平地加0，它将在Apache日志中引发错误，这是不希望的.

Instead of peacefully adding 0 in case it doesn't have enough decimal digits, it raises errors inside Apache log and that's not desirable.

因此number_format(2.1, 2)或number_format(0, 2)将在Apache日志中引发错误.

So number_format(2.1, 2) or number_format(0, 2) will raise error in Apache log.

[2011年6月30日星期四17:18:04] [错误] [客户端127.0.0.1] PHP注意:在线上的/home/tahoang/Desktop/Projects/weatherData/weatherData.php中遇到的格式不正确的数值41

[Thu Jun 30 17:18:04 2011] [error] [client 127.0.0.1] PHP Notice: A non well formed numeric value encountered in /home/tahoang/Desktop/Projects/weatherData/weatherData.php on line 41

该如何解决?

推荐答案

尝试强制类型转换 number_format()浮动:

Try type casting first parameter of number_format() to float:

$format = number_format((float)0, 2);

或

$format = number_format(floatval(0), 2);

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