Php/docs/mongodb-driver-readconcern.construct

• PHP Manual
• MongoDB\Driver\ReadConcern
• Create a new ReadConcern

MongoDB\Driver\ReadConcern::__construct

(mongodb >=1.0.0)

MongoDB\Driver\ReadConcern::__construct — Create a new ReadConcern

说明

final public MongoDB\Driver\ReadConcern::__construct ([ string $level ] )

Constructs a new MongoDB\Driver\ReadConcern, which is an immutable value object.

参数

level

The » read concern level. You may use, but are not limited to, one of the class constants.

错误／异常

• Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

范例

Example #1 MongoDB\Driver\ReadConcern::__construct() example

<?php/* Unspecified read isolation level (uses the server's default behavior) */$rc = new MongoDB\Driver\ReadConcern();/* Request read isolation from a single replica set node */$rc = new MongoDB\Driver\ReadConcern(MongoDB\Driver\ReadConcern::LOCAL);/* Request read isolation from a majority of the replica set nodes */$rc = new MongoDB\Driver\ReadConcern(MongoDB\Driver\ReadConcern::MAJORITY);?>

参见

• » Read Concern reference