Doctrine\ODM\MongoDB\SchemaManager::enableShardingForDbByDocumentName PHP Method

    public function enableShardingForDbByDocumentName($documentName)
    {
        $dbName = $this->dm->getDocumentDatabase($documentName)->getName();
        $adminDb = $this->dm->getConnection()->selectDatabase('admin');
        $result = $adminDb->command(array('enableSharding' => $dbName));
        // Error code is only available with MongoDB 3.2. MongoDB 3.0 only returns a message
        // Thus, check code if it exists and fall back on error message
        if ($result['ok'] == 1 || isset($result['code']) && $result['code'] == 23 || $result['errmsg'] == 'already enabled') {
            return;
        }
        throw MongoDBException::failedToEnableSharding($dbName, $result['errmsg']);
    }