The MongoDB\BSON\Undefined class

(mongodb >=1.4.0)

简介

BSON type for the "Undefined" type. This BSON type is deprecated, and this class can not be instantiated. It will be created from a BSON undefined type while converting BSON to PHP, and can also be converted back into BSON while storing documents in the database.

类摘要

final class MongoDB\BSON\Undefined implements MongoDB\BSON\Type, JsonSerializable, Stringable {
/* 方法 */
final private __construct()
final public jsonSerialize(): mixed
final public __toString(): string
}

更新日志

版本 说明
PECL mongodb 2.0.0

此类不再实现 Serializable 接口。

PECL mongodb 1.12.0 Implements Stringable for PHP 8.0+.

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