如何获得数字的整数和小数部分? [英] How to get whole and decimal part of a number?

问题描述

给出1.25，我如何获得该数字的"1"和".25"部分?

Given, say, 1.25 - how do I get "1" and ."25" parts of this number?

我需要检查小数部分是.0，.25，.5还是.75.

I need to check if the decimal part is .0, .25, .5, or .75.

推荐答案

$n = 1.25;
$whole = floor($n);      // 1
$fraction = $n - $whole; // .25

然后将其与1/4、1/2、3/4等进行比较.

Then compare against 1/4, 1/2, 3/4, etc.

在负数的情况下，使用此:

In cases of negative numbers, use this:

function NumberBreakdown($number, $returnUnsigned = false)
{
  $negative = 1;
  if ($number < 0)
  {
    $negative = -1;
    $number *= -1;
  }

  if ($returnUnsigned){
    return array(
      floor($number),
      ($number - floor($number))
    );
  }

  return array(
    floor($number) * $negative,
    ($number - floor($number)) * $negative
  );
}

$returnUnsigned阻止其将 -1.25 设置为 -1 ， -0.25

The $returnUnsigned stops it from making -1.25 in to -1 & -0.25

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