1. class
  2. MongoDB
  3. \
  4. BSON
  5. \
  6. Undefined

Undefined

final class Undefined implements Type, Serializable, JsonSerializable (View source)

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.

Methods

string|null
serialize()

Serialize an Undefined

void
unserialize(string $data)

Unserialize an Undefined

mixed
jsonSerialize()

Returns a representation that can be converted to JSON

string
__toString()

Returns the Undefined as a string

Details

at line 26
final string|null serialize()

Since: 1.2.0

Serialize an Undefined

Return Value

string|null

The string representation of the object or null

Exceptions

InvalidArgumentException

at line 35
final void unserialize(string $data)

Since: 1.2.0

Unserialize an Undefined

Parameters

string $data

The string representation of the object.

Return Value

void

Exceptions

InvalidArgumentException
UnexpectedValueException

at line 44
final mixed jsonSerialize()

Since: 1.2.0

Returns a representation that can be converted to JSON

Return Value

mixed

data which can be serialized by json_encode, which is a value of any type other than a resource.

Exceptions

InvalidArgumentException

at line 50
final string __toString()

Returns the Undefined as a string

Return Value

string

Returns the string representation of this Symbol.