The MongoDB\BSON\Decimal128 class
(mongodb >=1.2.0)
简介
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….
Note: MongoDB\BSON\Decimal128 is only compatible with MongoDB 3.4+. Attempting to use the BSON type with an earlier version of MongoDB will result in an error.
类摘要
final
MongoDB\BSON\Decimal128
implements MongoDB\BSON\Decimal128Interface
, MongoDB\BSON\Type
, Serializable
, JsonSerializable {
/* 方法 */
}
Table of Contents
- MongoDB\BSON\Decimal128::__construct — Construct a new Decimal128
- MongoDB\BSON\Decimal128::jsonSerialize — Returns a representation that can be converted to JSON
- MongoDB\BSON\Decimal128::serialize — Serialize a Decimal128
- MongoDB\BSON\Decimal128::__toString — Returns the string representation of this Decimal128
- MongoDB\BSON\Decimal128::unserialize — Unserialize a Decimal128
