# MongoDB\BSON\fromJSON

(mongodb >=1.0.0)

MongoDB\BSON\fromJSON — Returns the BSON representation of a JSON value

警告

This function has been DEPRECATED as of extension version 1.20.0 and was removed in 2.0. Applications should use MongoDB\BSON\Document::fromJSON() instead.

### 说明

MongoDB\BSON\fromJSON(string `$json`): string

Converts an » extended JSON string to its BSON representation.

### 参数

`json` (string)

  JSON value to be converted.

### 返回值

The serialized BSON document as a binary string.

### 错误／异常

- Throws MongoDB\Driver\Exception\UnexpectedValueException if the JSON value cannot be converted to BSON (e.g. due to a syntax error).

### 更新日志

版本 | 说明
--- | ---
PECL mongodb 2.0.0 | 此函数已被移除。

### 示例

示例 #1 MongoDB\BSON\fromJSON() example

`<?php
$json = '{ "_id": { "$oid": "563143b280d2387c91807965" } }';
$bson = MongoDB\BSON\fromJSON($json);
$value = MongoDB\BSON\toPHP($bson);
var_dump($value);
?>`

以上示例会输出：

    object(stdClass)#2 (1) {
      ["_id"]=>
      object(MongoDB\BSON\ObjectId)#1 (1) {
        ["oid"]=>
        string(24) "563143b280d2387c91807965"
      }
    }

### 参见

- MongoDB\BSON\Document::fromJSON() - Construct a new document instance from a JSON string
- MongoDB\BSON\toJSON() - Returns the Legacy Extended JSON representation of a BSON value
- » MongoDB Extended JSON
- » MongoDB BSON

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