MongoDB\Driver\ReadConcern
PHP Manual

MongoDB\Driver\ReadConcern::__construct

Create a new ReadConcern

Description

final public MongoDB\Driver\ReadConcern::__construct(stringnull $level = null)

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

Parameters

level

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

Errors/Exceptions

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

Examples

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);

?>