How to get whole and decimal part of a number?

Question

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

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

Answer 1

This code will split it up for you:

list($whole, $decimal) = explode('.', $your_number);

where $whole is the whole number and $decimal will have the digits after the decimal point.

Answer 2

This is the way which I use:

$float = 4.3;    

$dec = ltrim(($float - floor($float)),"0."); // result .3

Answer 3

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

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

---

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
  );
}

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

Answer 4

val = -3.1234

fraction = abs(val - as.integer(val) ) 

Answer 5

PHP 5.4+

$n = 12.343;
intval($n); // 12
explode('.', number_format($n, 1))[1]; // 3
explode('.', number_format($n, 2))[1]; // 34
explode('.', number_format($n, 3))[1]; // 343
explode('.', number_format($n, 4))[1]; // 3430

Answer 6

Brad Christie's method is essentially correct but it can be written more concisely.

function extractFraction ($value) 
{
    $fraction   = $value - floor ($value);
    if ($value < 0)
    {
        $fraction *= -1;
    }

    return $fraction;
}

This is equivalent to his method but shorter and hopefully easier to understand as a result.