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

For those who just wants to convert float to string.

function float_to_string($float)
{
    $string = (string)$float;

    if (preg_match('~\.(\d+)E([+-])?(\d+)~', $string, $matches)) {
        $decimals = $matches[2] === '-' ? strlen($matches[1]) + $matches[3] : 0;
        $string = number_format($float, $decimals,'.','');
    }

    return $string;
}

$float = 0.00000000020001;

echo $float; // 2.0001E-10
echo PHP_EOL;
echo float_to_string($float); // 0.00000000020001
echo PHP_EOL;

$float = 10000000000000000000000;

echo $float; // 1.0E+22
echo PHP_EOL;
echo float_to_string($float); // 10000000000000000000000
echo PHP_EOL;