PHP - Manual: MongoDB\BSON\Serializable::bsonSerialize

2024-11-15

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MongoDB\BSON\Serializable::bsonSerialize

(mongodb >=1.0.0)

MongoDB\BSON\Serializable::bsonSerialize — Provides an array or document to serialize as BSON

说明

abstract public MongoDB\BSON\Serializable::bsonSerialize(): array|object

Called during serialization of the object to BSON. The method must return an array or stdClass.

Root documents (e.g. a MongoDB\BSON\Serializable passed to MongoDB\BSON\fromPHP()) will always be serialized as a BSON document. For field values, associative arrays and stdClass instances will be serialized as a BSON document and sequential arrays (i.e. sequential, numeric indexes starting at 0) will be serialized as a BSON array.

Users are encouraged to include an _id property (e.g. a MongoDB\BSON\ObjectId initialized in your constructor) when returning data for a BSON root document; otherwise, the driver or database will need to generate a MongoDB\BSON\ObjectId when inserting or upserting the document, respectively.

参数

此函数没有参数。

返回值

An array or stdClass to be serialized as a BSON array or document.

范例

示例 #1 MongoDB\BSON\Serializable::bsonSerialize() returning an associative array for root document


<?php

class MyDocument implements MongoDB\BSON\Serializable
{
    private $id;

    function __construct()
    {
        $this->id = new MongoDB\BSON\ObjectId;
    }

    function bsonSerialize()
    {
        return ['_id' => $this->id, 'foo' => 'bar'];
    }
}

$bson = MongoDB\BSON\fromPHP(new MyDocument);
echo MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程的输出类似于：

{ "_id" : { "$oid" : "56cccdcada14d8755a58c591" }, "foo" : "bar" }

示例 #2 MongoDB\BSON\Serializable::bsonSerialize() returning a sequential array for root document


<?php

class MyArray implements MongoDB\BSON\Serializable
{
    function bsonSerialize()
    {
        return [1, 2, 3];
    }
}

$bson = MongoDB\BSON\fromPHP(new MyArray);
echo MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程会输出：

{ "0" : 1, "1" : 2, "2" : 3 }

示例 #3 MongoDB\BSON\Serializable::bsonSerialize() returning an associative array for document field


<?php

class MyDocument implements MongoDB\BSON\Serializable
{
    function bsonSerialize()
    {
        return ['foo' => 'bar'];
    }
}

$value = ['document' => new MyDocument];
$bson = MongoDB\BSON\fromPHP($value);
echo MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程会输出：

{ "document" : { "foo" : "bar" } }

示例 #4 MongoDB\BSON\Serializable::bsonSerialize() returning a sequential array for document field


<?php

class MyArray implements MongoDB\BSON\Serializable
{
    function bsonSerialize()
    {
        return [1, 2, 3];
    }
}

$value = ['array' => new MyArray];
$bson = MongoDB\BSON\fromPHP($value);
echo MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程会输出：

{ "array" : [ 1, 2, 3 ] }

参见

MongoDB\BSON\Unserializable::bsonUnserialize() - Constructs the object from a BSON array or document
MongoDB\BSON\Persistable
Persisting Data

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User Contributed Notes 1 note

down

Anonymous ¶

6 years ago


This documentation seems to be obsolete because I tried the first example and it doesn't convert the objectId to a string.

This seems to be more current documentation but I can't figure out how to get bson to json

http://mongodb.github.io/mongo-php-library/api/source-class-MongoDB.Model.BSONDocument.html#48-57

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官方地址：https://www.php.net/manual/en/mongodb-bson-serializable.bsonserialize.php

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MongoDB\BSON\Serializable::bsonSerialize

说明

参数

返回值

范例

参见

User Contributed Notes 1 note