MongoDB\BSON\Undefined::jsonSerialize

(mongodb >=1.4.0)

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

说明

参数

此函数没有参数。

返回值

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.

错误／异常

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

参见

• JsonSerializable::jsonSerialize() - 指定需要被序列化成 JSON 的数据
• json_encode() - 对变量进行 JSON 编码
• 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