The MongoBinData class

(PECL mongo >= 0.8.1)

Вступ

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().

Короткий Огляд Класа

MongoBinData {

/* Константи */

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 ;

/* Методи */

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

public string __toString ( void )

}

Предвизначені Константи

Binary Data Types

MongoBinData::GENERIC
0x00: Generic binary data.
MongoBinData::FUNC
0x01: Function.
MongoBinData::BYTE_ARRAY
0x02: Generic binary data (deprecated in favor of MongoBinData::GENERIC).
MongoBinData::UUID
0x03: Universally unique identifier (deprecated in favor of MongoBinData::UUID_RFC4122).
MongoBinData::UUID_RFC4122
0x04: Universally unique identifier (according to » RFC 4122).
MongoBinData::MD5
0x05: MD5.
MongoBinData::CUSTOM
0x80: User-defined type.

Журнал Змін

Версія	Опис
1.5.0	Added `MongoBinData::GENERIC` and `MongoBinData::UUID_RFC4122` constants.

Зміст

MongoBinData::__construct — Creates a new binary data object.
MongoBinData::__toString — The string representation of this binary data object.

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