Let’s suppose I have a **string** that contains “7.2769482308e+01” (this number came from 3rd party software, I cannot control the format).

What is the cheapest way to convert it into decimal `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?

**NOTE**: Guys, yes, I’ve read Convert exponential to a whole number in PHP and Convert exponential number to decimal in php. And that questions are irrelevant, since they already have a number, but I have a **string**.

What about a simple cast to a float value ?

```
$string = "7.2769482308e+01";
$float = (float) $string;
```

### Answer：

I had success using `number_format(1.2378147769392E+14, 0, '', '')`

which was originally provided by this question.

This also works when the value is a string, like so: `number_format("1.2378147769392E+14", 0, '', '')`

. Go ahead, give it a try.

### Answer：

Here is a very cheap one: `$float = "7.2769482308e+01" + 0;`