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<MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescriptionMongoDB\Driver\Monitoring\TopologyClosedEvent>
^MongoDB\Driver\Monitoring\TopologyChangedEventLast updated: Mon, 26 Oct 2026

MongoDB\Driver\Monitoring\TopologyChangedEvent::getTopologyId

(mongodb >=1.13.0)

MongoDB\Driver\Monitoring\TopologyChangedEvent::getTopologyId — Returns the topology ID

Description

final public function MongoDB\Driver\Monitoring\TopologyChangedEvent::getTopologyId(): MongoDB\BSON\ObjectId

Parameters

This function has no parameters.

Return Values

Returns the topology ID.

Errors/Exceptions


<MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescriptionMongoDB\Driver\Monitoring\TopologyClosedEvent>
^MongoDB\Driver\Monitoring\TopologyChangedEventLast updated: Mon, 26 Oct 2026