The following command will insert a single $document that contains an array of two key/value pairs, with the key names of isbn and name:

$document = array( "isbn" => "401", "name" => "MongoDB and PHP" );
$result = $collection->insertOne($document);
var_dump($result);

The output from the var_dump($result) command is shown as follows:

MongoDBInsertOneResult Object
(
   [writeResult:MongoDBInsertOneResult:private] => MongoDBDriverWriteResult Object
       (
           [nInserted] => 1
           [nMatched] => 0
           [nModified] => 0
           [nRemoved] => 0
           [nUpserted] => 0
           [upsertedIds] => Array
               (
               )

           [writeErrors] => Array
               (
               )

           [writeConcernError] =>
           [writeConcern] => MongoDBDriverWriteConcern Object
               (
               )

       )

   [insertedId:MongoDBInsertOneResult:private] => MongoDBBSONObjectID Object
       (
           [oid] => 5941ac50aabac9d16f6da142
       )

   [isAcknowledged:MongoDBInsertOneResult:private] => 1
)

This rather lengthy output contains all the information that we may need. We can get the ObjectId of the document inserted; the number of inserted, matched, modified, removed, and upserted documents by fields prefixed with n; and information about writeError or writeConcernError.

There are also convenience methods in the $result object if we want to get the information:

• $result->getInsertedCount(): To get the number of inserted objects
• $result->getInsertedId(): To get the ObjectId of the inserted document

We can also use the ->insertMany() method to insert many documents at once, as follows:

$documentAlpha = array( "isbn" => "402", "name" => "MongoDB and PHP, 2nd Edition" );
$documentBeta  = array( "isbn" => "403", "name" => "MongoDB and PHP, revisited" );
$result = $collection->insertMany([$documentAlpha, $documentBeta]);

print_r($result);

The result can be seen as follows:

(
   [writeResult:MongoDBInsertManyResult:private] => MongoDBDriverWriteResult Object
       (
           [nInserted] => 2
           [nMatched] => 0
           [nModified] => 0
           [nRemoved] => 0
           [nUpserted] => 0
           [upsertedIds] => Array
               (
               )

           [writeErrors] => Array
               (
               )

           [writeConcernError] =>
           [writeConcern] => MongoDBDriverWriteConcern Object
               (
               )

       )

   [insertedIds:MongoDBInsertManyResult:private] => Array
       (
           [0] => MongoDBBSONObjectID Object
               (
                   [oid] => 5941ae85aabac9d1d16c63a2
               )

           [1] => MongoDBBSONObjectID Object
               (
                   [oid] => 5941ae85aabac9d1d16c63a3
               )

       )

   [isAcknowledged:MongoDBInsertManyResult:private] => 1
)

Again, $result->getInsertedCount() will return 2, whereas $result->getInsertedIds() will return an array with the two newly-created ObjectIds:

array(2) {
 [0]=>
 object(MongoDBBSONObjectID)#13 (1) {
   ["oid"]=>
   string(24) "5941ae85aabac9d1d16c63a2"
 }
 [1]=>
 object(MongoDBBSONObjectID)#14 (1) {
   ["oid"]=>
   string(24) "5941ae85aabac9d1d16c63a3"
 }
}

Deleting documents is a similar process to inserting documents, but uses the deleteOne() and deleteMany() methods instead; an example of deleteMany() is shown as follows:

$deleteQuery = array( "isbn" => "401");
$deleteResult = $collection->deleteMany($deleteQuery);
print($deleteResult->getDeletedCount());

The following code block shows the output:

MongoDBDeleteResult Object
(
   [writeResult:MongoDBDeleteResult:private] => MongoDBDriverWriteResult Object
       (
           [nInserted] => 0
           [nMatched] => 0
           [nModified] => 0
           [nRemoved] => 2
           [nUpserted] => 0
           [upsertedIds] => Array
               (
               )

           [writeErrors] => Array
               (
               )

           [writeConcernError] =>
           [writeConcern] => MongoDBDriverWriteConcern Object
               (
               )

       )

   [isAcknowledged:MongoDBDeleteResult:private] => 1
)
2

In this example, we used ->getDeletedCount() to get the number of affected documents, which is printed in the last line of the output.