# log_reply

(PECL mongo >= 1.5.0)

log_reply — Callback When Reading the MongoDB reply

### 说明

log_reply ( array `$server` , array `$messageHeaders` , array `$operationHeaders` )

A callable function, used by the log_reply context option, when reading a reply from MongoDB.

> Note:

> This is not a real function, only a prototype of how the function should be.

### 参数

`server`

  An array containing the basic information about the server that was picked.

  key | value
  --- | ---
  hash | server hash, example: localhost:27017;-;X;56052
  type | Node type (primary/secondary/mongos/arbiter): 2
  max_bson_size | The maximum BSON Size over the wire this node accepts: 16777216
  max_message_size | The maximum Message Size over the wire this node accepts: 48000000
  request_id | The request identifier for this message: 42

`messageHeaders`

  key | value
  --- | ---
  length | integer, bytes, message reply length
  request_id | integer, the server request identifier
  response_id | integer, the driver request identifier this message is a response of
  opcode | integer, the opcode id

`operationHeaders`

  key | value
  --- | ---
  flags | integer, bitmask of protocol flags
  cursor_id | integer, ID of the cursor created on the server (0 if none created, or its been exhausted)
  start | The starting offset of this cursor
  returned | integer, how many documents are returned in this trip

### 参见

- The » OP_REPLY definition in the Wire Protocol