The BcMath\Number class

(PHP 8 >= 8.4.0)

Giriş

A class for an arbitrary precision number. These objects support overloaded arithmetic and comparison operators.

Bilginize: This class is not affected by the bcmath.scale INI directive set in php.ini.

Bilginize: The behavior of an overloaded operator is the same as specifying null for the scale parameter on the corresponding method.

Sınıf Sözdizimi

namespace BcMath;

final readonly class Number implements Stringable {

/* Özellikler */

public string $value;

public int $scale;

/* Yöntemler */

public __construct(string|int $num)

public add(BcMath\Number|string|int $num, ?int $scale = null): BcMath\Number

public ceil(): BcMath\Number

public compare(BcMath\Number|string|int $num, ?int $scale = null): int

public div(BcMath\Number|string|int $num, ?int $scale = null): BcMath\Number

public divmod(BcMath\Number|string|int $num, ?int $scale = null): array

public floor(): BcMath\Number

public mod(BcMath\Number|string|int $num, ?int $scale = null): BcMath\Number

public mul(BcMath\Number|string|int $num, ?int $scale = null): BcMath\Number

public pow(BcMath\Number|string|int $exponent, ?int $scale = null): BcMath\Number

public powmod(BcMath\Number|string|int $exponent, BcMath\Number|string|int $modulus, ?int $scale = null): BcMath\Number

public round(int $precision = 0, RoundingMode $mode = RoundingMode::HalfAwayFromZero): BcMath\Number

public __serialize(): array

public sqrt(?int $scale = null): BcMath\Number

public sub(BcMath\Number|string|int $num, ?int $scale = null): BcMath\Number

public __toString(): string

public __unserialize(array $data): void

}

Özellikler

value: A string representation of an arbitrary precision number.
scale: The scale value currently set on the object. For objects resulting from calculations, this value is automatically computed and set, unless the scale parameter was set in the calculation method.

İçindekiler

BcMath\Number::add — Adds an arbitrary precision number
BcMath\Number::ceil — Rounds up an arbitrary precision number
BcMath\Number::compare — Compares two arbitrary precision numbers
BcMath\Number::__construct — Creates a BcMath\Number object
BcMath\Number::div — Divides by an arbitrary precision number
BcMath\Number::divmod — Gets the quotient and modulus of an arbitrary precision number
BcMath\Number::floor — Rounds down an arbitrary precision number
BcMath\Number::mod — Gets the modulus of an arbitrary precision number
BcMath\Number::mul — Multiplies an arbitrary precision number
BcMath\Number::pow — Raises an arbitrary precision number
BcMath\Number::powmod — Raises an arbitrary precision number, reduced by a specified modulus
BcMath\Number::round — Rounds an arbitrary precision number
BcMath\Number::__serialize — Serializes a BcMath\Number object
BcMath\Number::sqrt — Gets the square root of an arbitrary precision number
BcMath\Number::sub — Subtracts an arbitrary precision number
BcMath\Number::__toString — Converts BcMath\Number to string
BcMath\Number::__unserialize — Deserializes a data parameter into a BcMath\Number object

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User Contributed Notes 2 notes

down

harl at gmail dot com ¶

1 year ago

BcMath\Number is one of those classes that overloads boolean casting.
If $z = new BcMath\Number(0) then $z is considered falsy (and hence, for example, empty($z)==true) even though it is a genuine Number object.

down

miken32 at gmail dot com ¶

19 days ago

This class overloads many operators so you can do operations more naturally. But a big caveat is that the strict equality operator *does not work* as demonstrated with this code:

<?php
$sum = new BcMath\Number('23.93') + new BcMath\Number(17) - 6;
echo $sum;            // outputs 34.93

if ($sum < 99 && $sum > 34) {
    echo "foo";       // outputs foo
}

$comp = new BcMath\Number('34.93');
if ($sum === $comp) {
    echo "bar";       // outputs nothing!
}

if ($sum == $comp) {
    // yuck, don't do this
}

if ($sum->compare($comp) === 0) {
    echo "baz";       // outputs baz
}
?>

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