(mongodb >=0.2.0)
MongoDB\Driver\BulkWrite::insert — Add a insert operation to the bulk
$document
   )
documentA document to add to the insert bulk.
   If the document did not have an _id, a
   BSON\ObjectID will be generated and returned.
   Otherwise no value is returned.
  
Example #1 MongoDB\Driver\BulkWrite::insert() example
<?php
$bulk = new MongoDB\Driver\BulkWrite(true);
$document1 = array(
    "title" => "Example#1",
);
$document2 = array(
    "_id"   => "custom pregenerated ID",
    "title" => "Example#1",
);
$document3 = array(
     "_id"   => new BSON\ObjectID,
    "title" => "Example#1",
);
$_id1 = $bulk->insert($document1);
$_id2 = $bulk->insert($document2);
$_id3 = $bulk->insert($document3);
var_dump($_id1, $_id2, $_id3);
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$writeConcern = new MongoDB\Driver\WriteConcern(MongoDB\Driver\WriteConcern::MAJORITY, 1000);
$result = $manager->executeBulkWrite("databaseName.collectionName", $bulk, $writeConcern);
?>
以上例程的输出类似于:
object(BSON\ObjectID)#3 (1) {
  ["oid"]=>
  string(24) "54d51146bd21b91405401d92"
}
NULL
NULL