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PHP – Round a value up to the nearest multiple value

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round(), ceil() and the like to a good job of most things in PHP.

But what if you need to round the number up to the nearest 10 or nearest 15 etc.  This little function makes this easy:

function roundToNearestMultiple($value, $roundTo)
{
    $mod = $value%$roundTo;
    return $value+($mod<($roundTo/2)?-$mod:$roundTo-$mod);
}

Usage:

$number= roundToNearestMultiple($input, 10);

/* 
    Outputs:
      $input= 7 -> $number= 10
      $input= 85 -> $number= 90
*/

$number= roundToNearestMultiple($input, 15);

/* 
    Outputs:
      $input= 89 -> $number= 90
      $input= 1869 -> $number= 1875
*/

 

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