PHP 7.1.21 Released

MongoDB\Driver\ReadConcern::__construct

(mongodb >=1.0.0)

MongoDB\Driver\ReadConcern::__constructCreate 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

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);

?>
add a note add a note

User Contributed Notes

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