# The MongoDB\Driver\ServerApi class

(mongodb >=1.10.0)

## 简介

## 类摘要

final class MongoDB\Driver\ServerApi implements MongoDB\BSON\Serializable, Serializable {
/* 常量 */
const string MongoDB\Driver\ServerAPI::V1 = "1";
/* 方法 */
final public function bsonSerialize(): stdClass
final public function __construct(string `$version`, ?bool `$strict` = `null`, ?bool `$deprecationErrors` = `null`)
}

## 预定义常量

`MongoDB\Driver\ServerApi::V1`
  Server API version 1.

## 示例

示例 #1 Declare an API version on a manager

    <?php

    use MongoDB\Driver\Manager;
    use MongoDB\Driver\ServerApi;

    $v1 = new ServerApi(ServerApi::v1);
    $manager = new Manager('mongodb://localhost:27017', [], ['serverApi' => $v1]);

    $command = new MongoDB\Driver\Command(['buildInfo' => 1]);

    try {
        $cursor = $manager->executeCommand('admin', $command);
    } catch(MongoDB\Driver\Exception $e) {
        echo $e->getMessage(), "\n";
        exit;
    }

    /* The buildInfo command returns a single result document, so we need to access
     * the first result in the cursor. */
    $buildInfo = $cursor->toArray()[0];

    echo $buildInfo->version, "\n";

    ?>

以上示例会输出：

    4.9.0-alpha7-49-gb968ca0

示例 #2 Declare a strict API version on a manager

The following example sets the `strict` flag, which tells the server to reject any command that is not part of the declared API version. This results in an error when running the buildInfo command.

    <?php

    use MongoDB\Driver\Manager;
    use MongoDB\Driver\ServerApi;

    $v1 = new ServerApi(ServerApi::v1, true);
    $manager = new Manager('mongodb://localhost:27017', [], ['serverApi' => $v1]);

    $command = new MongoDB\Driver\Command(['buildInfo' => 1]);

    try {
        $cursor = $manager->executeCommand('admin', $command);
    } catch(MongoDB\Driver\Exception $e) {
        echo $e->getMessage(), "\n";
        exit;
    }

    /* The buildInfo command returns a single result document, so we need to access
     * the first result in the cursor. */
    $buildInfo = $cursor->toArray()[0];

    echo $buildInfo->version, "\n";

    ?>

以上示例会输出：

    Provided apiStrict:true, but the command buildInfo is not in API Version 1

## 目录

- MongoDB\Driver\ServerApi::bsonSerialize — Returns an object for BSON serialization
- MongoDB\Driver\ServerApi::__construct — Create a new ServerApi instance

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