(mongodb >=1.4.0)
MongoDB\Driver\Manager::startSession — Start a new client session for use with this client
$options
  ] )Creates a MongoDB\Driver\Session for the given options. The session may then be specified when executing commands, queries, and write operations.
Hinweis: A MongoDB\Driver\Session can only be used with the MongoDB\Driver\Manager from which it was created.
options
| Option | Type | Description | Default | 
|---|---|---|---|
| causalConsistency | boolean | 
            
            Configure causal consistency in a session. If  See » Casual Consistency in the MongoDB manual for more information.  | 
          TRUE | 
         
Returns a MongoDB\Driver\Session.