# MongoDB\BSON\fromJSON

(mongodb >=1.0.0)

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

### 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).

### 范例

Example #1 MongoDB\BSON\fromJSON() example

    <?php

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

    ?>

以上例程会输出：

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

### 参见

- MongoDB\BSON\toJSON() - Returns the Legacy Extended JSON representation of a BSON value
- » MongoDB Extended JSON
- » MongoDB BSON