PHP 8.1.0 Alpha 2 available for testing

The MongoDB\BSON\Decimal128 class

(mongodb >=1.2.0)

はじめに

BSON type for the » Decimal128 floating-point format, which supports numbers with up to 34 decimal digits (i.e. significant digits) and an exponent range of −6143 to +6144.

Unlike the double BSON type (i.e. float in PHP), which only stores an approximation of the decimal values, the decimal data type stores the exact value. For example, MongoDB\BSON\Decimal128('9.99') has a precise value of 9.99 where as a double 9.99 would have an approximate value of 9.9900000000000002131628….

注意: MongoDB\BSON\Decimal128 は、 MongoDB 3.4 以降でしか使えません。それより前のバージョンの MongoDB の BSON 型でこれを使おうとすると、エラーが発生します。

クラス概要

final MongoDB\BSON\Decimal128 implements MongoDB\BSON\Decimal128Interface , MongoDB\BSON\Type , Serializable , JsonSerializable {
/* メソッド */
final public __construct(string $value = ?)
final public jsonSerialize(): mixed
final public serialize(): string
final public __toString(): string
final public unserialize(string $serialized): void
}

変更履歴

バージョン 説明
PECL mongodb 1.3.0 Implements MongoDB\BSON\Decimal128Interface.
PECL mongodb 1.2.0 Implements Serializable and JsonSerializable.

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