• API Documentation >
• MongoDB\Database Class >
• MongoDB\Database::dropCollection()

MongoDB\Database::dropCollection()

Definition

MongoDB\Database::dropCollection

Drop a collection within the current database.

copy

function dropCollection(string $collectionName, array $options = []): array|object

This method has the following parameters:

Parameter	Type	Description
$collectionName	string	The name of the collection to drop.
$options	array	Optional. An array specifying the desired options.

The $options parameter supports the following options:

Option	Type	Description
encryptedFields	array|object	Optional. A document describing encrypted fields for queryable encryption. If omitted, the encryptedFieldsMap option within the autoEncryption driver option will be consulted. If encryptedFieldsMap was defined but does not specify this collection, the library will make a final attempt to consult the server-side value for encryptedFields. See Field Encryption and Queryability in the MongoDB manual for more information. Note This option is not passed to the drop command. The library uses it to determine related metadata collections that should be dropped in addition to an encrypted collection. New in version 1.13.
comment	mixed	Optional. Enables users to specify an arbitrary comment to help trace the operation through the database profiler, currentOp output, and logs. This is not supported for server versions prior to 4.4 and will result in an exception at execution time if used. New in version 1.13.
session	MongoDB\Driver\Session	Optional. Client session to associate with the operation. New in version 1.3.
typeMap	array	Optional. The type map to apply to cursors, which determines how BSON documents are converted to PHP values. Defaults to the database’s type map. This will be used for the returned command result document.
writeConcern	MongoDB\Driver\WriteConcern	Optional. Write concern to use for the operation. Defaults to the database’s write concern.

Return Values

An array or object with the result document of the drop command. The return type will depend on the typeMap option.

Errors/Exceptions

MongoDB\Exception\UnsupportedException if options are used and not supported by the selected server (e.g. collation, readConcern, writeConcern).

MongoDB\Exception\InvalidArgumentException for errors related to the parsing of parameters or options.

MongoDB\Driver\Exception\RuntimeException for other errors at the driver level (e.g. connection errors).

Example

The following example drops the users collection in the test database:

copy

<?php

$db = (new MongoDB\Client)->test;

$result = $db->dropCollection('users');

var_dump($result);

The output would then resemble:

copy

object(MongoDB\Model\BSONDocument)#8 (1) {
  ["storage":"ArrayObject":private]=>
  array(3) {
    ["ns"]=>
    string(10) "test.users"
    ["nIndexesWas"]=>
    int(1)
    ["ok"]=>
    float(1)
  }
}

See Also

• MongoDB\Collection::drop()
• drop command reference in the MongoDB manual

←   MongoDB\Database::drop() MongoDB\Database::getDatabaseName()  →

© MongoDB, Inc 2008-present. MongoDB, Mongo, and the leaf logo are registered trademarks of MongoDB, Inc.