PHP Manual: Divides by an arbitrary precision number

Description

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

Divides $this by num.

Parameters

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

Return Values

Returns the result of division as a new BcMath\Number object.

When the BcMath\Number::scale of the result object is automatically set, the BcMath\Number::scale of the dividend is used. However, in cases such as indivisible division, the BcMath\Number::scale of the result is expanded. Expansion is done only as needed, up to a maximum of +10.

That is, if the BcMath\Number::scale of the dividend is 5, the BcMath\Number::scale of the result is between 5 and 15.

Even in indivisible calculations, the BcMath\Number::scale will not always be +10. A 0 at the end of the result is considered not to need expansion, so the BcMath\Number::scale is reduced by that amount. The BcMath\Number::scale will never be less than the BcMath\Number::scale before expansion. See also the code example.

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
BcMath\Number::scale of the result object is outside the valid range

This method throws a DivisionByZeroError exception if num is 0.

Examples

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

<?php
$number = new BcMath\Number('0.002');

$ret1 = $number->div(new BcMath\Number('2.000'));
$ret2 = $number->div('-3');
$ret3 = $number->div(32);

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

The above example will output:

object(BcMath\Number)#1 (2) {
  ["value"]=>
  string(5) "0.002"
  ["scale"]=>
  int(3)
}
object(BcMath\Number)#3 (2) {
  ["value"]=>
  string(5) "0.001"
  ["scale"]=>
  int(3)
}
object(BcMath\Number)#2 (2) {
  ["value"]=>
  string(16) "-0.0006666666666"
  ["scale"]=>
  int(13)
}
object(BcMath\Number)#4 (2) {
  ["value"]=>
  string(9) "0.0000625"
  ["scale"]=>
  int(7)
}

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

<?php
$number = new BcMath\Number('0.002');

$ret1 = $number->div(new BcMath\Number('2.000'), 15);
$ret2 = $number->div('-3', 5);
$ret3 = $number->div(32, 2);

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

The above example will output:

object(BcMath\Number)#1 (2) {
  ["value"]=>
  string(5) "0.002"
  ["scale"]=>
  int(3)
}
object(BcMath\Number)#3 (2) {
  ["value"]=>
  string(17) "0.001000000000000"
  ["scale"]=>
  int(15)
}
object(BcMath\Number)#2 (2) {
  ["value"]=>
  string(8) "-0.00066"
  ["scale"]=>
  int(5)
}
object(BcMath\Number)#4 (2) {
  ["value"]=>
  string(4) "0.00"
  ["scale"]=>
  int(2)
}

Example #3 BcMath\Number::div example of expansioning BcMath\Number::scale of result object

<?php
var_dump(
    new BcMath\Number('0.001')->div('10001'),
    new BcMath\Number('0.001')->div('10001', 13),
    new BcMath\Number('0.001')->div('100000000000001'),
);
?>

The above example will output:

object(BcMath\Number)#2 (2) {
  ["value"]=>
  string(13) "0.00000009999"
  ["scale"]=>
  int(11)
}
object(BcMath\Number)#3 (2) {
  ["value"]=>
  string(15) "0.0000000999900"
  ["scale"]=>
  int(13)
}
object(BcMath\Number)#4 (2) {
  ["value"]=>
  string(5) "0.000"
  ["scale"]=>
  int(3)
}

BcMath\Number::div

Description

Parameters

Return Values

Errors/Exceptions

Examples

See Also