MongoDB\Driver\ReadConcern::getLevel
(mongodb >=1.0.0)
MongoDB\Driver\ReadConcern::getLevel — Returns the ReadConcern's "level" option
说明
final public MongoDB\Driver\ReadConcern::getLevel
( void
) : string|null
参数
此函数没有参数。
返回值
Returns the ReadConcern's "level" option.
错误／异常
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
范例
Example #1 MongoDB\Driver\ReadConcern::getLevel() example
<?php
$rc = new MongoDB\Driver\ReadConcern();
var_dump($rc->getLevel());
$rc = new MongoDB\Driver\ReadConcern(MongoDB\Driver\ReadConcern::LOCAL);
var_dump($rc->getLevel());
$rc = new MongoDB\Driver\ReadConcern(MongoDB\Driver\ReadConcern::MAJORITY);
var_dump($rc->getLevel());
?>
以上例程会输出：
NULL string(5) "local" string(8) "majority"