MongoDB\Driver\Manager::startSession

参数

options

options

Option	Type	Description	Default
causalConsistency	boolean	Configure causal consistency in a session. If TRUE, each operation in the session will be causally ordered after the previous read or write operation. Set to FALSE to disable causal consistency. See » Casual Consistency in the MongoDB manual for more information.	TRUE
defaultTransactionOptions	array	Default options to apply to newly created transactions. These options are used unless they are overridden when a transaction is started with different value for each option. options Option Type Description readConcern MongoDB\Driver\ReadConcern A read concern to apply to the operation. This option is available in MongoDB 3.2+ and will result in an exception at execution time if specified for an older server version. readPreference MongoDB\Driver\ReadPreference A read preference to use for selecting a server for the operation. writeConcern MongoDB\Driver\WriteConcern A write concern to apply to the operation. This option is available in MongoDB 4.0+.	[]