从php7将json插入Mongodb

Question

I'm working on a migration project from php5.6 to 7.x in which I have a json with special characters in keys. How can I insert this to mongodb?

In php5.6 I was using MongoClient as the driver which internally converts the special characters and hence I was able to insert the document. But I'm not able to achieve the same in php7. I'm using MongoDB\Driver\Manager to connect to Mongodb.

EDIT:

I have a set of api's coming from another system with the below format

$content_array=
{
    "context": {
        "extensions": {
            "http://id.tincanapi.com/extension/platform": "web",
            "http://id.tincanapi.com/extension/browser-info": "Mozilla/5.0",
            "http://id.tincanapi.com/extension/host-session-id": "4e320015"
        }
    }
}
$dbconnection = new MongoDB\Client($uri);
$db = $dbconnection->$dbname;
$collection = $db->$dbcoll;

$collection->insertOne(json_decode($content_array));

It fails in the above , saying "Invalid document for insert: keys cannot contain \".\":in the key". I understand its a not a good practice to use these characters in the key, however since this piece of code works in php5.6 using MongoClient I wanted to keep the changes as minimal as possible when migrating to php7.

EDIT 2:

The piece of code which works in php5.6

$dbconnection = new \MongoClient($dbhost, $options); 
if (!empty($dbconnection)) {
$db = $dbconnection->selectDB($dbname);
$collection = $db->selectCollection($dbcoll);
$status = 0;
if (!empty($collection)) {
$collection->insert(json_decode($content_array));
$status = 1;
}

EDIT3:

part of me was wrong in not giving all details at once.. i do a json_decode to convert to native php array before inserting to mongo.

Any help would be appreciated. Thanks.