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MongoDB\Database::dropCollection()

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Definition

MongoDB\Database::dropCollection

Drop a collection within the current database.

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function dropCollection($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
session MongoDB\Driver\Session

Optional. Client session to associate with the operation.

Sessions are not supported for server versions prior to 3.6.

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.

This is not supported for server versions prior to 3.4 and will result in an exception at execution time if used.

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:

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<?php

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

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

var_dump($result);

The output would then resemble:

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

See Also

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