Types
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The MongoBinData class

(PECL mongo >= 0.8.1)

简介

An object that can be used to store or retrieve binary data from the database.

The maximum size of a single object that can be inserted into the database is 16MB. For data that is larger than this (movies, music, Henry Kissinger's autobiography), use MongoGridFS. For data that is smaller than 16MB, you may find it easier to embed it within the document using MongoBinData.

For example, to embed an image in a document, one could write:

<?php

$profile = array("username" => "foobity",
    "pic" => new MongoBinData(file_get_contents("gravatar.jpg"))
);

$users->save($profile);

?>

This class contains a type field, which currently gives no additional functionality in the driver or the database. There are five predefined types (which are the class constants listed below), and the user can create their own (at the risk of the BSON spec catching up with them). By default, the PHP driver always uses type 2: a byte array.

类摘要

MongoBinData {
/* 常量 */
const int FUNC = 1 ;
const int BYTE_ARRAY = 2 ;
const int UUID = 3 ;
const int MD5 = 5 ;
const int CUSTOM = 128 ;
/* Fields */
public string $bin ;
public int $type = 2 ;
/* 方法 */
public __construct ( string $data [, int $type = 2 ] )
public string __toString ( void )
}

预定义常量

Binary Data Types

MongoBinData::FUNC
0x01
Function.
MongoBinData::BYTE_ARRAY
0x02
Array of bytes.
MongoBinData::UUID
0x03
Universally unique identifier.
MongoBinData::MD5
0x05
MD5.
MongoBinData::CUSTOM
0x80
User-defined type.

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Types
PHP 手册