BcMath\Number::mod
(PHP 8 >= 8.4.0)
BcMath\Number::mod — Gets the modulus of an arbitrary precision number
说明
Gets the remainder of dividing $this by num.
Unless num is 0, the result has the same sign
as $this.
参数
num- The divisor.
返回值
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.
错误／异常
This method throws a ValueError in the following cases:
numis string and not a well-formed BCMath numeric stringscaleis outside the valid range
This method throws a DivisionByZeroError exception if
num is 0.
示例
示例 #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);
?>以上示例会输出：
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)
}
示例 #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);
?>以上示例会输出：
object(BcMath\Number)#1 (2) {
["value"]=>
string(3) "8.3"
["scale"]=>
int(1)
}
object(BcMath\Number)#3 (2) {
["value"]=>
string(3) "1.6"
["scale"]=>
int(1)
}
object(BcMath\Number)#2 (2) {
["value"]=>
string(5) "0.000"
["scale"]=>
int(3)
}
object(BcMath\Number)#4 (2) {
["value"]=>
string(1) "3"
["scale"]=>
int(0)
}
参见
- bcmod() - 任意精度数字取模
- BcMath\Number::div() - Divides by an arbitrary precision number
- BcMath\Number::divmod() - Gets the quotient and modulus of an arbitrary precision number
- BcMath\Number::powmod() - Raises an arbitrary precision number, reduced by a specified modulus