(mongodb >=1.0.0)
MongoDB\Driver\WriteResult::getUpsertedIds — 傳回已插入文件的識別碼陣列
此函式沒有參數。
傳回一個包含更新插入文件識別碼（即 `"_id"` 欄位值）的陣列。陣列鍵將對應到負責更新插入的寫入操作索引（來自 MongoDB\Driver\BulkWrite）。
範例 #1 MongoDB\Driver\WriteResult::getUpsertedIds() 範例
<?php
$manager = new MongoDB\Driver\Manager;
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['x' => 1]);
$bulk->update(['x' => 1], ['$set' => ['y' => 3]]);
$bulk->update(['x' => 2], ['$set' => ['y' => 1]], ['upsert' => true]);
$bulk->update(['x' => 3], ['$set' => ['y' => 2]], ['upsert' => true]);
$bulk->delete(['x' => 1]);
$result = $manager->executeBulkWrite('db.collection', $bulk);
var_dump($result->getUpsertedIds());
?>上述範例將輸出類似以下的內容：
array(2) {
[2]=>
object(MongoDB\BSON\ObjectId)#4 (1) {
["oid"]=>
string(24) "580e62a224f2302f191b880b"
}
[3]=>
object(MongoDB\BSON\ObjectId)#5 (1) {
["oid"]=>
string(24) "580e62a224f2302f191b880c"
}
}