The MongoDB\BSON\Undefined class (deprecated)

    (mongodb >=1.4.0)

    Introduction

    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.

    Class synopsis

    final class MongoDB\BSON\Undefined implements MongoDB\BSON\Type, Serializable, JsonSerializable, Stringable {
    /* Methods */
    final private __construct()
    final public jsonSerialize(): mixed
    final public serialize(): string
    final public __toString(): string
    final public unserialize(string $data): void
    }

    Changelog

    Version Description
    PECL mongodb 1.12.0 Implements Stringable for PHP 8.0+.

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