(PHP 8 >= 8.4.0)
BcMath\Number::div — Divides by an arbitrary precision number
Divides $this by num.
numscalenull, the BcMath\Number::scale of the calculation result will be set automatically.
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.
This method throws a ValueError in the following cases:
num is string and not a well-formed BCMath numeric stringscale is outside the valid range
This method throws a DivisionByZeroError exception if
num is 0.
示例 #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);
?>以上示例会输出：
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)
}
示例 #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);
?>以上示例会输出：
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)
}
示例 #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'),
);
?>以上示例会输出：
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)
}