PHP Emulated SQL Filesystem: Emulate a filesystem storing files in SQL database

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Ratings				Unique User Downloads		Download Rankings
62%				Total: 422		All time: 6,383 This week: 49

Version		License		PHP version		Categories
`sqlefs` 0.8.5		MIT/X Consortium ...		5.0		PHP 5, Files and Folders, Emulators

Description

Author

Ryan Cole

This class can emulate a file system storing files in a SQL database.

It can connect to a given database using PDO and performs several types of operations with names very similar to DOS and Linux to make it work like a file system. Currently it can:

- Set the name of the currently emulated disk
- Change the current directory to a given path
- List files of given path
- Fetch information of a file
- Fetch information of all files with a given path
- Get subdirectories of a given directory
- Change the current directory to the parent directory
- Read or write to a given file
- Remove a file or a directory
- Copy a file to another
- Check if a file exists
- Set or get the owner of a given file
- Write a file with a given uploaded file contents
- Serve a given file for download
- Load or save serialized data to a file
- Resolve the path of file with given parameters
- Create, list and describe disk volumes
- Format, check the status, defragment, and backup a disk

Innovation Award

April 2016
Number 5

Many applications need to store and retrieve files that need to be accessible by a cluster of Web servers.

One solution for this problem, is to store files, at least not very large files, in databases.

This class emulates a file system on a SQL database. It provides all sorts of commands to manage files, directories and disk with similar names to those used in Linux and DOS.

Manuel Lemos

Ryan Cole

Name:	Ryan Cole `<contact>`
Classes:	1 package by Ryan Cole
Country:	United States

Innovation award

Nominee: 1x

Example


<?php

# This script allows a user to make post their favorite color on the website.

# This program is a demostration of basic file handling methods in SQLEFS. 

# See it in action at: http://practicalproductivity.com/sqlefs/colorlog.php



### This file just handles your login details and sets the volume. ###

require_once 'sqlefs_login.php';



### Or you could specify that stuff in your script like so ###

# require_once '../sqlefs.class.php';

# $efs = new efsclass();

# $efs->connect('mysql:mysql:host=localhost;dbname=myefsdb name pass');

# $efs->cd('c:/');



$showlen = 10; # show this many entries

$namelen = 25; # max length of name

$do = isset($_REQUEST['color']) ? 'post' : 'view';



### Set the current working directory. ###

$efs->cd('/submissions/');   



# view comments

if ($do == 'view') {

    $content = '<h1>Visitors Favorite Colors</h1>';



    $content .= '

        <p>Enter your name and favorite color!</p>

        <div>

        <form role="form" method="post" enctype="multipart/form-data">

        <input type="text" name="name" placeholder="Name" size="' . $namelen . '">

        <input type="color" name="color">

        <input type="submit">

        </form>

        </div>

    ';



    ### Retrieve a listing of files and reverse it so newest are first. ###

    $files = array_reverse($efs->ls());



    # list each entry. We also reverse them to see newest first

    foreach ($files as $file) {



        ### Load our file as serialized data. ###

        $submission = $efs->load($file);



        $content .= '<div class="name">' . $submission['name'] . '</div>' ;

        $content .= '<div class="color" style="background-color: ' . $submission['color'] . '"></div>' ;

    }

}



# post a color

if ($do == 'post') {

    $content = '<b>Thanks for posting!</b>';

    $name = htmlspecialchars(  substr($_REQUEST['name'], 0, $namelen)  );

    if ($name === '') {$name = 'Anonymous';}

    $color = htmlspecialchars($_REQUEST['color']);

    $data = array('name' => $name, 'color' => $color);

    $filename = crc32($name . $color);



    ### Save data in serialized format. ###

    $efs->save($filename, $data);   



    # We intend to limit the number of entries we show...

    # SQLEFS orders file listings by oldest first by default,

    # so we'll just delete the first files in the listing

    # until we have the right number to show.



    ### Retrieve file listing. ###

    $files = $efs->ls();   



    $trimcount = count($files) - $showlen;

    while ($trimcount > 0) {



        ### Delete the file removed from the array. ###

        $efs->rm(  array_shift($files)  );



        $trimcount -= 1;

    }

    $content .= '<hr><a href="colorlog.php">view entries</a>';

}



?><html>

<head><head>

<style>

.name {width: 200px;text-align: center;}

.color {width: 200px;height: 25px;}

</style>

<body>

<?php echo $content; ?>

</body>

</html>

Examples

Screenshots (2)

Files (5)

File	Role	Description
`admin.php`	Example	Admin page with file manager & console
`colorlog.php`	Example	Example
`sqlefs.class.php`	Class	SQLEFS Class File

The PHP Classes site has supported package installation using the Composer tool since 2013, as you may verify by reading this instructions page.

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	sqlefs-2016-04-10.zip 122KB
	sqlefs-2016-04-10.tar.gz 123KB
	Install with Composer

Version Control

Unique User Downloads

Download Rankings

Total:	422
This week:	0

All time:	6,383
This week:	49

User Ratings

User Comments (2)

	All time
Utility:	90%
Consistency:	90%
Documentation:	-
Examples:	85%
Tests:	-
Videos:	-
Overall:	62%
Rank:	909

Very interesting initial idea that generates a lot of other i... 9 years ago (Christian Vigh)	52%
thats a amazing class ;-) 9 years ago (Jos� Filipe Lopes Santos)	70%