显示2个小数位而不四舍五入 [英] Show 2 decimal places without rounding off

问题描述

可能重复:
如何将数字格式化为只有两位小数地方?

Possible Duplicate:
How do I format numbers to have only two decimal places?

我到处都在寻找解决方案.假设我有一个变量，其数字是这样的:

I have looked all over for a solution. Say i have a variable with a number like this:

$price1 = 1597;
$price2 = 1497.85;

是否有一个函数显示偶数位的小数点后2位:

Is there a function that displays 2 decimal places without rounding off when there is a even number:

$price1 = 1597.00;
$price2 = 1497.85;

更新:

我发现了问题，MySQL SUM(总计)函数将值取整:

          $result = mysql_query("SELECT SUM(total), SUM(subtotal) FROM jos_vm_order_list WHERE user_id = '$user_id'");

while($totalrow = mysql_fetch_array($result))
  {



    $total = $row['SUM(total)'];
    $total = number_format($total, 2, '.', '');
    $subtotal = $row['SUM(subtotal)'];
    $subtotal = number_format($subtotal, 2, '.', '');

  }

在使用MySQL SUM()函数时，是否仍然无法舍入?

谢谢您的帮助.

推荐答案

请参见 http ://php.net/manual/en/function.number-format.php

number_format($number, 2, '.', '');

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