SplFixedArray::jsonSerialize Returns a representation that can be converted to JSON &reftitle.description; public arraySplFixedArray::jsonSerialize Serializes the array to a value that can be serialized natively by json_encode. &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; Returns array data which can be serialized by json_encode, which is a value of any type other than a &resource;.