如何在PHP中将Exponentials转换为小数 [英] How to convert Exponentials to Decimals in PHP
问题描述
我有这样一个字符串:
9.018E-14
现在我想将其转换为正常的十进制数字。
编辑:这里有一些PHP的魔力:
$ stringval =12e-3;
$ numericval = 0 + $ stringval;
从:
如果字符串不包含任何字符'。','e'或'E',并且数值适合整数类型限制(由PHP_INT_MAX定义),则字符串将被评估为整数。如果您需要更灵活的格式(例如从相同的数字中提取四个数字)字符串),使用
sscanf
像这样:
$ stringval =12e -3\" ;
$ numericval = sscanf($ stringval,%f)[0];
echo $ numericval;
I have a string like this:
9.018E-14
Now I want to convert to this to the normal decimal numbers.
解决方案EDIT: Here is some PHP magic:
$stringval = "12e-3"; $numericval = 0 + $stringval;
From the PHP docs:
If the string does not contain any of the characters '.', 'e', or 'E' and the numeric value fits into integer type limits (as defined by PHP_INT_MAX), the string will be evaluated as an integer. In all other cases it will be evaluated as a float.
If you need a more flexible format (e.g. extract four numbers from the same string), use
sscanf
like this:$stringval = "12e-3"; $numericval = sscanf($stringval, "%f")[0]; echo $numericval;
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