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=============================================
MongoDB\\GridFS\\Bucket::openDownloadStream()
=============================================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
Definition
----------
.. phpmethod:: MongoDB\\GridFS\\Bucket::openDownloadStream()
Selects a GridFS file by its ``_id`` and opens it as a readable stream.
.. code-block:: php
function openDownloadStream($id): resource
This method has the following parameters:
.. include:: /includes/apiargs/MongoDBGridFSBucket-method-openDownloadStream-param.rst
Return Values
-------------
A readable stream resource.
Errors/Exceptions
-----------------
.. include:: /includes/extracts/error-gridfs-filenotfoundexception.rst
.. include:: /includes/extracts/error-driver-runtimeexception.rst
Examples
--------
.. code-block:: php
<?php
$bucket = (new MongoDB\Client)->test->selectGridFSBucket();
$uploadStream = fopen('php://temp', 'w+b');
fwrite($uploadStream, "foobar");
rewind($uploadStream);
$id = $bucket->uploadFromStream('filename', $uploadStream);
$downloadStream = $bucket->openDownloadStream($id);
var_dump(stream_get_contents($downloadStream));
The output would then resemble::
string(6) "foobar"
See Also
--------
- :phpmethod:`MongoDB\\GridFS\\Bucket::downloadToStream()`
- :phpmethod:`MongoDB\\GridFS\\Bucket::downloadToStreamByName()`
- :phpmethod:`MongoDB\\GridFS\\Bucket::openDownloadStreamByName()`