PHP - Manual: MongoCursorInterface::setReadPreference
2024-12-22
(PECL mongo >=1.6.0)
MongoCursorInterface::setReadPreference — Set the read preference for this query
$read_preference
[, array $tags
] ) : MongoCursorInterfaceread_preference
The read preference mode: MongoClient::RP_PRIMARY
, MongoClient::RP_PRIMARY_PREFERRED
, MongoClient::RP_SECONDARY
, MongoClient::RP_SECONDARY_PREFERRED
, or MongoClient::RP_NEAREST
.
tags
An array of zero or more tag sets, where each tag set is itself an array of criteria used to match tags on replica set members.
Returns this cursor.
Emits E_WARNING
if either parameter is invalid, or if one or more tag sets are provided with the MongoClient::RP_PRIMARY
read preference mode.
官方地址:https://www.php.net/manual/en/mongocursorinterface.setreadpreference.php