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