How to Use MongoDB as File Storage in PHP

/*
prerequisites

i) MongoDB 3.0 or higher
ii) PHP Driver

[Remember| install both on the same server]

This example will store a >1GB video on a MongoDB server.

the source code `mkdir src` must be stored in a directory so create one
to create a successful connection and understanding between your files and storage, create a settings file
your new directory will contain a `Settings.php` file with the following PHP contents:
*/

<?php
    # Remember| PHP 7.0 allows you to have one `define` using an array
    define("USERNAME_MONGODB", "[your_username]");
    define("PASSWORD_MONGODB", "[your_password]");
    define("DATABASE_MONGODB", "[your_databaseName]");
    define("SERVERIP_MONGODB", "[your_serverIP or your_hostname]");

    // the following script will enable file storage so you can store a file
    require_once(__DIR__ . '/Settings.php');

    if (!isset($argv[1]))
    {
        die("Please mention/pass the filepath to the file you want to store in MongoDB Server.");
    }

    $storage_filepath = $argv[1];

    if (!file_exists($storage_filepath) || is_dir($storage_filepath))
    {
        die("Invalid! Please, re-check your filepath.");
    }


    function mongo_Connect($your_username, $your_password, $your_database, $your_host_serverIP)
    {
        $con_MongoDB = new Mongo("mongodb://{$your_username}:{$your_password}@{$your_host_serverIP}"); // Connect to Mongo Server
        $con_database = $con_MongoDB -> selectDB($your_database); // Connect to Database
        return $con_database;
    }

    $con_database = mongo_Connect(
        USERNAME_MONGODB,
        PASSWORD_MONGODB,
        DATABASE_MONGODB,
        SERVERIP_MONGODB
    );

    $grid_FS = $con_database -> getGridFS();

    # you can stick any metadata here, e.g., upload the owner's ID, date of execution, etc.
    $add_metadata = array("date" => new MongoDate());
    $storage_filepath = $storage_filepath;
    $grid_FS -> storeFile($storage_filepath, array("metadata" => $add_metadata));

    // You can execute the script using the php `StoreFile.php` "filename.com.avi"
    // list files with the file size
    require_once(__DIR__ . '/Settings.php');

    function _mongoConnect($your_username, $your_password, $your_database, $your_host_serverIP)
    {
        $con_MongoDB = new Mongo("mongodb://{$your_username}:{$your_password}@{$your_host_serverIP}"); // Connect to Mongo Server
        $con_database = $con_MongoDB -> selectDB($your_database); // Connect to Database
        return $con_database;
    }

    $con_database = _mongoConnect(
        USERNAME_MONGODB,
        PASSWORD_MONGODB,
        DATABASE_MONGODB,
        SERVERIP_MONGODB
    );

    $grid_FS = $con_database -> getGridFS();

    # Loop over the files and output their names and file sizes
    $storage_files = $grid_FS -> find();

    while (($your_file = $storage_files -> getNext()) != null)
    {
        print $your_file -> getFilename() . "\t" . $your_file -> getSize() . PHP_EOL;
    }

    // retrieve files
    require_once(__DIR__ . '/Settings.php');

    if (!isset($argv[1]))
    {
        die("Please mention/pass the filepath to the file you want to store in MongoDB Server.");
    }

    $storage_filepath = $argv[1];

    if (!file_exists($storage_filepath) || is_dir($storage_filepath))
    {
        die("Invalid! Please, re-check your filepath.");
    }

    function mongoConnect($your_username, $your_password, $your_database, $your_host_serverIP)
    {
        $con_MongoDB = new Mongo("mongodb://{$your_username}:{$your_password}@{$your_host_serverIP}"); // Connect to Mongo Server
        $con_database = $con_MongoDB -> selectDB($your_database); // Connect to Database
        return $con_database;
    }

    $con_database = mongoConnect(
        USERNAME_MONGODB,
        PASSWORD_MONGODB,
        DATABASE_MONGODB,
        SERVERIP_MONGODB
    );

    $grid_FS = $con_database -> getGridFS();

    # in the following code, you can search for the filepath passed in as the first argument
    $search_fileParams = array("filename" => $storage_filepath);

    if (false)
    {
        # If you used absolute paths when storing files, then you could use the following to download a folder's contents.
        $folder = '/path/to/folder';

        # Refer to https://secure.php.net/manual/en/class.mongoregex.php
        $file_get_filename = new MongoRegex("/^$folder");

        $search_fileParams = array(
            'filename' => $file_get_filename
        );
    }

    # Alternatively, use findOne($search_fileParams) if you expect only one file with the provided name.
    $storage_files = $grid_FS -> find($search_fileParams);

    while (($your_file = $storage_files -> getNext()) != null)
    {
        # Use a random string in case there is a file with the same name in the current directory.
        $random_string = substr(str_shuffle(MD5(microtime())), 0, 10);
        $outputFile_path = __DIR__ . '/' . $random_string . "_" . basename($your_file -> getFilename());
        $your_file -> write($outputFile_path);
        print "Retrieved: " . $outputFile_path . PHP_EOL;
    }

    // use the script like
    // php RetrieveFiles.php "my_filename.mp4"
?>

Retrieved: my_filename.mp4