PHP Manual: Gets the modulus of an arbitrary precision number

Description

public BcMath\Number BcMath\Number::mod(BcMath\Numberstringint $num, intnull $scale = null)

Gets the remainder of dividing $this by num. Unless num is 0, the result has the same sign as $this.

Parameters

num: The divisor.
scale: BcMath\Number::scale explicitly specified for calculation results. If null, the BcMath\Number::scale of the calculation result will be set automatically.

Return Values

Returns the modulus as a new BcMath\Number object.

When the BcMath\Number::scale of the result object is automatically set, the greater BcMath\Number::scale of the two numbers used for modulus operation is used.

That is, if the BcMath\Number::scales of two values are 2 and 5 respectively, the BcMath\Number::scale of the result will be 5.

Errors/Exceptions

This method throws a ValueError in the following cases:

num is string and not a well-formed BCMath numeric string
scale is outside the valid range

This method throws a DivisionByZeroError exception if num is 0.

Examples

Example #1 BcMath\Number::mod example when scale is not specified

<?php
$number = new BcMath\Number('8.3');

$ret1 = $number->mod(new BcMath\Number('2.22'));
$ret2 = $number->mod('8.3');
$ret3 = $number->mod(-5);

var_dump($number, $ret1, $ret2, $ret3);
?>

The above example will output:

object(BcMath\Number)#1 (2) {
  ["value"]=>
  string(3) "8.3"
  ["scale"]=>
  int(1)
}
object(BcMath\Number)#3 (2) {
  ["value"]=>
  string(4) "1.64"
  ["scale"]=>
  int(2)
}
object(BcMath\Number)#2 (2) {
  ["value"]=>
  string(3) "0.0"
  ["scale"]=>
  int(1)
}
object(BcMath\Number)#4 (2) {
  ["value"]=>
  string(3) "3.3"
  ["scale"]=>
  int(1)
}

Example #2 BcMath\Number::mod example of explicitly specifying scale

<?php
$number = new BcMath\Number('8.3');

$ret1 = $number->mod(new BcMath\Number('2.22'), 1);
$ret2 = $number->mod('8.3', 3);
$ret3 = $number->mod(-5, 0);

var_dump($number, $ret1, $ret2, $ret3);
?>