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 4Mb. For data that is larger than this (movies, music, Henry Kissinger's autobiography), use MongoGridFS. For data that is smaller than 4Mb, it's probably be easier to just embed it into 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.

MongoBinData::__construct — 创建一个新的二进制数据对象
MongoBinData::__toString — 二进制数据对象的字符串表达形式。

The MongoBinData class

简介

类摘要

预定义常量

Binary Data Types

Table of Contents

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