MONGODB Gridfs Access file PHP sample

Recent projects need to use MongoDB access files, here is a simple PHP example:

Public Function run () {
Initialize Gridfs
$m = new Mongoclient (); Connection
$db = $m->selectdb ("Excel");
Dump ($m), exit;
$collection = $db->testexcel;
$grid = $db->getgridfs (); Get Gridfs Object

Gridfs has three ways of storing files
The first type of direct storage file
$id = $grid->storefile (dirname (__file__). /emptyaction.class.php ");
echo $id;

Get files
$file = $grid->findone (Array (' _id ' => $id)); Take _id as index to get files
Header (' content-type:image/png '); Output Picture Header
Dump ($file);
}

View all uploaded files on the MongoDB command line:

1.show DBS

List all databases

2.use Excel

Go to a database named Excel

3.db.fs.files.find ()

List all uploaded files

Upload the file through Gridfs, it is passed to fs.files this collection by default. Gridfs has two sets, "Fs.chunks" and "Fs.files", the former is fragmented storage, the latter is normal file storage, suitable for less than 4M of files.