Question

我有一个来自数据库的数字列表，范围从0.001到10，我需要以最小精度显示2位小数但没有最大精度。

示例数字和预期转换：

1 - ＆gt; 1.00
0.1 - > 0.10
0.01 - ＆gt; 0.01
0.001 - ＆gt; 0.001
1.234 - ＆gt; 1.234
0.035 - ＆gt; 0.035
25.5 - ＆gt; 25.50

任何想法？

Answer 1

function min_precision($x, $p)
{
  $e = pow(10,$p);
  return floor($x*$e)==$x*$e?sprintf("%.${p}f",$x):$x;
}

foreach (Array(1,0.1,0.01,0.001,1.234,0.035,25.5) as $x)
{
  echo $x . " -> " . min_precision($x,2) . "\n";
}

输出：

1 -> 1.00
0.1 -> 0.10
0.01 -> 0.01
0.001 -> 0.001
1.234 -> 1.234
0.035 -> 0.035
25.5 -> 25.50

Answer 2

$number = split('.', $dbNumber);
if(strlen($number[1]) < 2)
     $resultNumber = number_format($dbNumber,2);
else
     $resultNumber = $dbNumber;

其中$ dbNumber是来自数据库的数字

Answer 3

number_format(25.5, 2)

http://us.php.net/number_format

PHP上的最小精度

3 个答案: