Returns a representation that can be converted to JSON

# MongoDB\BSON\Undefined::jsonSerialize

(mongodb >=1.4.0)

MongoDB\BSON\Undefined::jsonSerialize — Returns a representation that can be converted to JSON

### 説明

final public function MongoDB\BSON\Undefined::jsonSerialize(): mixed

### パラメータ

この関数にはパラメータはありません。

### 戻り値

Returns data which can be serialized by json_encode() to produce an extended JSON representation of the MongoDB\BSON\Undefined.

> 注意: The output is consistent with the MongoDB\BSON\toJSON() function, which uses the driver-specific legacy extended JSON format. This does not necessarily match the » relaxed or » canonical extended JSON representations used by MongoDB\BSON\toRelaxedExtendedJSON() and MongoDB\BSON\toCanonicalExtendedJSON(), respectively.

### エラー / 例外

- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

### 参考

- JsonSerializable::jsonSerialize() - JSON にシリアライズしたいデータを指定する
- json_encode() - 値を JSON 形式にして返す
- MongoDB\BSON\toCanonicalExtendedJSON() - Returns the Canonical Extended JSON representation of a BSON value
- MongoDB\BSON\toRelaxedExtendedJSON() - Returns the Relaxed Extended JSON representation of a BSON value
- » MongoDB Extended JSON

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