(mongodb >=1.2.0)
MongoDB\Driver\WriteConcern::bsonSerialize — Returns an object for BSON serialization
此函数没有参数。
Returns an object for serializing the WriteConcern as BSON.
示例 #1 MongoDB\Driver\WriteConcern::bsonSerialize() with majority write concern
<?php
$wc = new MongoDB\Driver\WriteConcern(MongoDB\Driver\WriteConcern::MAJORITY);
var_dump($wc->bsonSerialize());
echo "\n", MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($wc));
?>以上示例的输出类似于：
object(stdClass)#2 (1) { ["w"]=> string(8) "majority" } { "w" : "majority" }示例 #2 MongoDB\Driver\WriteConcern::bsonSerialize() with wtimeout and journal
<?php
$wc = new MongoDB\Driver\WriteConcern(2, 1000, true);
var_dump($wc->bsonSerialize());
echo "\n", MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($wc));
?>以上示例的输出类似于：
object(stdClass)#2 (3) { ["w"]=> int(2) ["j"]=> bool(true) ["wtimeout"]=> int(1000) } { "w" : 2, "j" : true, "wtimeout" : 1000 }