Convert float to plain string representation

Question

SO,

The problem

My question is about trivial thing: how to convert numeric string to it\'s plain (\"native\") representation. That means: if

Answer 1

Because sprintf() with "%.f" has trouble with expressions such as "1e-8", some text processing may be required:

function convertFloat($floatAsString)
{
    $norm = strval(floatval($floatAsString));

    if (($e = strrchr($norm, 'E')) === false) {
        return $norm;
    }

    return number_format($norm, -intval(substr($e, 1)));
}

Tested with:

3          3
1.5        1.5
-15.482e-2 -0.15482
1e-8       0.00000001
1e+3       1000
-4.66E-2   -0.0466
3e-3       0.003