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The MongoBinData class

(PECL mongo >= 0.8.1)

Warning

This extension that defines this class is deprecated. Instead, the MongoDB extension should be used. Alternatives to this class include:

MongoDB\BSON\Binary

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"), MongoBinData::GENERIC),
);

$users->save($profile);

?>

This class contains a type field, which currently gives no additional functionality in the PHP driver or the database. There are seven predefined types, which are defined as class constants below. For backwards compatibility, the PHP driver uses MongoBinData::BYTE_ARRAY as the default; however, this may change to MongoBinData::GENERIC in the future. Users are encouraged to specify a type in MongoBinData::__construct().

类摘要

MongoBinData {

/* 常量 */

const int GENERIC = 0 ;

const int FUNC = 1 ;

const int BYTE_ARRAY = 2 ;

const int UUID = 3 ;

const int UUID_RFC4122 = 4 ;

const int MD5 = 5 ;

const int CUSTOM = 128 ;

/* Fields */

public string $bin ;

public int $type = 2 ;

/* 方法 */

public __construct ( string $data [, int $type = 0 ] )

public __toString ( void ) : string

}

预定义常量

Binary Data Types

MongoBinData::GENERIC: Generic binary data.
MongoBinData::FUNC: Function.
MongoBinData::BYTE_ARRAY: Generic binary data (deprecated in favor of MongoBinData::GENERIC).
MongoBinData::UUID: Universally unique identifier (deprecated in favor of MongoBinData::UUID_RFC4122).
MongoBinData::UUID_RFC4122: Universally unique identifier (according to » RFC 4122).
MongoBinData::MD5: MD5.
MongoBinData::CUSTOM: User-defined type.

更新日志

版本	说明
1.5.0	Added `MongoBinData::GENERIC` and `MongoBinData::UUID_RFC4122` constants.

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。

User Contributed Notes

sander at steffann dot nl 27-May-2010 04:04


Note MongoBinData::CUSTOM has value 0x80, not 0xf0

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