README

Production-ready PHP library for secure file uploads with validation, virus scanning, rate limiting, and cloud storage support.

Features

• Security First: MIME type validation, extension filtering, forbidden filename blocking, path traversal prevention
• Validation System: Chainable validators with detailed result objects
• Rate Limiting: Prevent abuse with configurable rate limiters (in-memory or file-based)
• Virus Scanning: ClamAV integration for malware detection
• Storage Abstraction: Local storage with Flysystem-compatible interface for cloud providers
• Event System: Hook into upload lifecycle with event listeners
• Image Processing: Resize, compress, watermark, and convert images
• Logging: PSR-3 compatible logging interface
• Multi-File Upload: Handle single and multiple file uploads

Requirements

• PHP 8.1 or higher
• fileinfo extension
• json extension
• gd extension (for image processing)

Installation

composer require farisc0de/phpfileuploading

Quick Start

Basic Upload

<?php

use Farisc0de\PhpFileUploading\Upload;
use Farisc0de\PhpFileUploading\File;
use Farisc0de\PhpFileUploading\Utility;

$upload = new Upload(new Utility());

$upload->setUploadFolder([
    'folder_name' => 'uploads',
    'folder_path' => realpath('uploads')
]);

$upload->enableProtection();

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $file = new File($_FILES['file'], new Utility());
    $upload->setUpload($file);

    if ($upload->checkIfNotEmpty() && 
        $upload->checkExtension() && 
        $upload->checkMime() && 
        $upload->checkSize()) {
        
        $upload->hashName(); // Generate secure filename
        $upload->upload();
        
        echo "File uploaded successfully!";
    }
}

Using the Validation Chain

<?php

use Farisc0de\PhpFileUploading\File;
use Farisc0de\PhpFileUploading\Utility;
use Farisc0de\PhpFileUploading\Validation\ValidationChain;
use Farisc0de\PhpFileUploading\Validation\Validators\ExtensionValidator;
use Farisc0de\PhpFileUploading\Validation\Validators\MimeTypeValidator;
use Farisc0de\PhpFileUploading\Validation\Validators\SizeValidator;
use Farisc0de\PhpFileUploading\Validation\Validators\FilenameValidator;

$file = new File($_FILES['file'], new Utility());

$validator = new ValidationChain();
$validator
    ->addValidator(new ExtensionValidator(['jpg', 'png', 'gif', 'pdf']))
    ->addValidator(new MimeTypeValidator([
        'image/jpeg', 'image/png', 'image/gif', 'application/pdf'
    ]))
    ->addValidator(new SizeValidator(null, '10 MB'))
    ->addValidator(new FilenameValidator(['shell.php', 'backdoor.php']));

$result = $validator->validate($file);

if ($result->isValid()) {
    // Proceed with upload
} else {
    // Handle errors
    foreach ($result->getErrors() as $error) {
        echo $error->getMessage() . "\n";
    }
}

Rate Limiting

<?php

use Farisc0de\PhpFileUploading\RateLimiting\FileRateLimiter;

// Allow 10 uploads per minute per IP
$limiter = new FileRateLimiter('/path/to/rate-limit-storage', 10, 60);

$clientIp = $_SERVER['REMOTE_ADDR'];
$result = $limiter->check($clientIp);

if (!$result->isAllowed()) {
    http_response_code(429);
    header('Retry-After: ' . $result->getRetryAfter());
    die('Rate limit exceeded. Try again later.');
}

// Proceed with upload...

Virus Scanning

<?php

use Farisc0de\PhpFileUploading\Security\ClamAvScanner;

$scanner = new ClamAvScanner(
    socketPath: '/var/run/clamav/clamd.sock'
);

if ($scanner->isAvailable()) {
    $result = $scanner->scan($file->getTempName());
    
    if ($result->isInfected()) {
        die('Virus detected: ' . $result->getVirusName());
    }
}

Event System

<?php

use Farisc0de\PhpFileUploading\Events\EventDispatcher;
use Farisc0de\PhpFileUploading\Events\UploadEvents;
use Farisc0de\PhpFileUploading\Events\FileEvent;

$dispatcher = new EventDispatcher();

// Log all uploads
$dispatcher->addListener(UploadEvents::AFTER_UPLOAD, function (FileEvent $event) {
    $logger->info('File uploaded: ' . $event->getFilename());
});

// Block certain file types
$dispatcher->addListener(UploadEvents::BEFORE_VALIDATION, function (FileEvent $event) {
    $file = $event->getFile();
    if (str_ends_with($file->getName(), '.exe')) {
        $event->stopPropagation();
        throw new \Exception('EXE files are not allowed');
    }
});

Storage Abstraction

<?php

use Farisc0de\PhpFileUploading\Storage\LocalStorage;
use Farisc0de\PhpFileUploading\Storage\StorageManager;

// Single disk
$storage = new LocalStorage('/var/www/uploads', 0755, 0644, 'https://example.com/uploads');

$storage->write('path/to/file.jpg', $contents);
$url = $storage->publicUrl('path/to/file.jpg');

// Multiple disks
$manager = new StorageManager();
$manager->createLocalDisk('uploads', '/var/www/uploads', 'https://example.com/uploads');
$manager->createLocalDisk('temp', '/tmp/uploads');

$manager->disk('uploads')->write('file.jpg', $contents);

Logging

<?php

use Farisc0de\PhpFileUploading\Logging\FileLogger;
use Farisc0de\PhpFileUploading\Logging\LogLevel;

$logger = new FileLogger('/var/log/uploads.log', LogLevel::INFO);

$upload->setLogger($logger);
$validator->setLogger($logger);

Image Processing

<?php

use Farisc0de\PhpFileUploading\Image;

$image = new Image();

// Resize
$image->resize('source.jpg', 'thumb.jpg', 200, 200);

// Compress
$image->compress('source.jpg', 'compressed.jpg', 75);

// Add watermark
$image->addWatermark('source.jpg', 'watermark.png', 'output.jpg', 'bottom-right');

// Convert format
$image->convert('source.png', 'output.webp', 'webp', 80);

Configuration

Filter Configuration (filter.json)

The library uses a JSON configuration file for extension/MIME mappings and size limits:

{
    "extensions": {
        "jpg": "image/jpeg",
        "png": "image/png",
        "pdf": "application/pdf"
    },
    "forbidden": [
        "shell.php",
        "backdoor.php",
        ".htaccess"
    ],
    "size_limits": {
        "image": "10 MB",
        "document": "20 MB",
        "video": "100 MB",
        "default": "50 MB"
    },
    "categories": {
        "images": ["image/jpeg", "image/png", "image/gif"],
        "documents": ["application/pdf", "application/msword"]
    }
}

Exception Handling

The library provides specific exception types for different error scenarios:

use Farisc0de\PhpFileUploading\Exception\ValidationException;
use Farisc0de\PhpFileUploading\Exception\StorageException;
use Farisc0de\PhpFileUploading\Exception\FileNotFoundException;
use Farisc0de\PhpFileUploading\Exception\ConfigurationException;
use Farisc0de\PhpFileUploading\Exception\ImageException;

try {
    $upload->upload();
} catch (ValidationException $e) {
    // Handle validation errors
    echo "Validation failed: " . $e->getMessage();
    echo "Type: " . $e->getValidationType();
    print_r($e->getContext());
} catch (StorageException $e) {
    // Handle storage errors
} catch (FileNotFoundException $e) {
    // Handle missing files
}

Testing

# Run tests
composer test

# Run tests with coverage
composer test-coverage

# Static analysis
composer phpstan

# Code style check
composer cs-check

Directory Structure

src/
├── Exception/          # Custom exception classes
├── Events/             # Event system
├── Logging/            # PSR-3 logging
├── RateLimiting/       # Rate limiting
├── Security/           # Virus scanning
├── Storage/            # Storage abstraction
├── Validation/         # Validation system
│   └── Validators/     # Individual validators
├── File.php            # File representation
├── Image.php           # Image processing
├── Upload.php          # Main upload handler
├── Utility.php         # Helper functions
└── filter.json         # Default filter config

Security Best Practices

1. Always validate file types using both extension and MIME type checking
2. Use hashed filenames to prevent overwriting and path traversal
3. Store uploads outside web root when possible
4. Enable virus scanning in production environments
5. Implement rate limiting to prevent abuse
6. Set appropriate file permissions (0644 for files, 0755 for directories)
7. Use HTTPS for file uploads
8. Validate image dimensions to prevent resource exhaustion

License

MIT License - see LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Credits

Developed by FarisCode