================================
MongoDB\\Collection::deleteOne()
================================

.. default-domain:: mongodb

.. contents:: On this page
   :local:
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   :depth: 1
   :class: singlecol

Definition
----------

.. phpmethod:: MongoDB\\Collection::deleteOne()

   Deletes at most one document that matches the filter criteria. If multiple
   documents match the filter criteria, only the :term:`first <natural order>`
   matching document will be deleted.

   .. code-block:: php

      function deleteOne($filter, array $options = []): MongoDB\DeleteResult

   This method has the following parameters:

   .. include:: /includes/apiargs/MongoDBCollection-method-deleteOne-param.rst

   The ``$options`` parameter supports the following options:

   .. include:: /includes/apiargs/MongoDBCollection-method-deleteOne-option.rst

   :returns:

      A :phpclass:`MongoDB\\DeleteResult` object, which encapsulates a
      :php:`MongoDB\\Driver\\WriteResult <class.mongodb-driver-writeresult>`
      object.

Example
-------

The following example deletes one document in the ``users`` collection that has
has ``"ny"`` as the value for the ``state`` field:

.. code-block:: php

   <?php

   $collection = (new MongoDB\Client)->demo->users;
   $collection->drop();

   $collection->insertOne(['name' => 'Bob', 'state' => 'ny']);
   $collection->insertOne(['name' => 'Alice', 'state' => 'ny']);
   $deleteResult = $collection->deleteOne(['state' => 'ny']);

   printf("Deleted %d document(s)\n", $deleteResult->getDeletedCount());

The output would then resemble::

   Deleted 1 document(s)

.. seealso::

   - :phpmethod:`MongoDB\\Collection::deleteMany()`
   - :phpmethod:`MongoDB\\Collection::bulkWrite()`
   - :doc:`/tutorial/crud`
   - :manual:`delete command reference </reference/command/delete`
     in the MongoDB manual
