php 将显示为字符串的指数数转换为十进制数
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Convert exponential number presented as string to a decimal
提问by zerkms
Let's suppose I have a stringthat contains "7.2769482308e+01" (this number came from 3rd party software, I cannot control the format).
假设我有一个包含“7.2769482308e+01”的字符串（这个数字来自 3rd 方软件，我无法控制格式）。
What is the cheapest way to convert it into decimal 72.769482308?
将其转换为十进制最便宜的方法是什么72.769482308？
The only solution I can think of is to split decimal + exponential part and use multiplication. But may be there some built it function to do the same?
我能想到的唯一解决方案是拆分小数+指数部分并使用乘法。但是可能有一些内置的功能来做同样的事情吗？
NOTE: Guys, yes, I've read Convert exponential to a whole number in PHPand Convert exponential number to decimal in php. And that questions are irrelevant, since they already have a number, but I have a string.
注：伙计们，是的，我读过转换指数在PHP中的整数和在PHP转换指数数为十进制。这些问题无关紧要，因为它们已经有了一个数字，但我有一个string。
回答by hsz
What about a simple cast to a float value ?
简单地转换为浮点值怎么样？
$string = "7.2769482308e+01";
$float = (float) $string;
回答by jwhat
I had success using number_format(1.2378147769392E+14, 0, '', '')which was originally provided by this question.
我成功使用了number_format(1.2378147769392E+14, 0, '', '')最初由this question提供的内容。
This also works when the value is a string, like so: number_format("1.2378147769392E+14", 0, '', ''). Go ahead, give it a try.
这也适用，如果值是一个字符串，像这样：number_format("1.2378147769392E+14", 0, '', '')。来吧，试一试。
回答by steloh
Here is a very cheap one: $float = "7.2769482308e+01" + 0;
这是一个非常便宜的： $float = "7.2769482308e+01" + 0;
