PHPCon Poland 2024


(mongodb >=1.4.0)

MongoDB\Driver\Manager::startSessionStart a new client session for use with this client


final public MongoDB\Driver\Manager::startSession(?array $options = null): MongoDB\Driver\Session

Creates a MongoDB\Driver\Session for the given options. The session may then be specified when executing commands, queries, and write operations.

Note: A MongoDB\Driver\Session can only be used with the MongoDB\Driver\Manager from which it was created.

Liste de paramètres


Option Type Description Default
causalConsistency bool

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.

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.

Option Type Description
maxCommitTimeMS integer

Le temps maximum en millisecondes pour permettre à une seule commande commitTransaction de s'exécuter.

Si spécifié, maxCommitTimeMS doit être un entier 32 bits signé supérieur ou égal à zéro.

readConcern MongoDB\Driver\ReadConcern

Une préoccupation de lecture à appliquer à l'opération.

Cette option est disponible dans MongoDB 3.2+ et se traduira par une exception au moment de l'exécution si elle est spécifiée pour une version plus ancienne du serveur.

readPreference MongoDB\Driver\ReadPreference

Une préférence de lecture à utiliser pour sélectionner un serveur pour l'opération.

writeConcern MongoDB\Driver\WriteConcern

Une préoccupation d'écriture à appliquer à l'opération.

This option is available in MongoDB 4.0+.

snapshot bool

Configure snapshot reads in a session. If true, a timestamp will be obtained from the first supported read operation in the session (i.e. find, aggregate, or unsharded distinct). Subsequent read operations within the session will then utilize a "snapshot" read concern level to read majority-committed data from that timestamp. Set to false to disable snapshot reads.

Snapshot reads require MongoDB 5.0+ and cannot be used with causal consistency, transactions, or write operations. If "snapshot" is true, "causalConsistency" will default to false.

See » Read Concern "snapshot" in the MongoDB manual for more information.


Valeurs de retour

Returns a MongoDB\Driver\Session.

Erreurs / Exceptions


Version Description
PECL mongodb 1.11.0

The "snapshot" option was added.

PECL mongodb 1.6.0

The "maxCommitTimeMS" option was added to "defaultTransactionOptions".

PECL mongodb 1.5.0

The "defaultTransactionOptions" option was added.

Voir aussi

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top