如何删除浮点数小数部分末尾的零？

Question

I have in database product prices with 4 digits in decimal part, i.e;

4.5000
0.0050
5.0000

I want to show on the website these prices with minimum 2 decimal digits (without rounding), i.e;

4.50
0.005
5.00

I tried number_format, but it still leaves 4 digits in decimal part.

And also I need to use thousands separator on a base part of that number and own delimiter of decimal part.

How to do this?

Answer 1

function trimDecimalZero($num, $delim = ',', $tsep = ' ') {
    @list($base, $decimals) = explode('.',
        rtrim(number_format((float) $num, 4, '.', $tsep), '0'));

    if (intval($decimals)) {
        return sprintf('%s%s%s',
            $base, $delim, strlen($decimals) < 2 ? $decimals .'0' : $decimals);
    }

    return sprintf('%s%s%02d', $base, $delim, $decimals);
}

$nums = [4.5000, 0.0050, 5.0000];
foreach ($nums as $num) {
    var_dump(trimDecimalZero($num));
}

Result as expected;

string(4) "4,50"
string(5) "0,005"
string(4) "5,00"