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Installation

LibreDTE Core is distributed via Composer and requires PHP 8.5 or higher.

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Requirements

Before installing, ensure your system meets these requirements:
1

PHP Version

PHP 8.5 or higher is required
php -v
2

Required Extensions

Verify the following PHP extensions are installed:
  • ext-curl: HTTP communication with SII
  • ext-json: JSON data handling
  • ext-mbstring: Multibyte string processing
  • ext-openssl: Digital signatures and encryption
  • ext-soap: SOAP webservice client for SII
php -m | grep -E "curl|json|mbstring|openssl|soap"
3

Composer

Composer is required for dependency management
composer --version
If not installed, get it from getcomposer.org

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Install via Composer

composer require libredte/libredte-lib-core
LibreDTE Core has minimum-stability: dev with prefer-stable: true. This allows installation of development dependencies while preferring stable versions when available.

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Verify Installation

After installation, verify LibreDTE Core is properly installed: 
<?php

require 'vendor/autoload.php';

use libredte\lib\Core\Application;

// Create application instance
$app = Application::getInstance('prod', false);

echo "LibreDTE Core installed successfully!\n";

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Dependencies

LibreDTE Core automatically installs these key dependencies:

Symfony Components

  • symfony/cache: Caching support
  • symfony/filesystem: File operations
  • symfony/mailer: Email functionality
  • symfony/mime: MIME type handling

Document Processing

  • mpdf/mpdf: PDF generation
  • tecnickcom/tcpdf: Alternative PDF library
  • league/csv: CSV processing
  • phpseclib/phpseclib: Cryptography

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Environment Configuration

LibreDTE Core supports different environments: 
<?php

use libredte\lib\Core\Application;

// Development environment with debug enabled
$app = Application::getInstance('dev', true);

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Global Helper Function

LibreDTE Core provides a global helper function for convenient access: 
<?php

require 'vendor/autoload.php';

// Load the bootstrap file
require 'vendor/libredte/libredte-lib-core/app/bootstrap.php';

// Use the global helper function
$app = libredte_lib('prod', false);

// Access services
$billingPackage = $app->getService('libredte.lib.billing');
The singleton pattern via getInstance() is provided for convenience but is not recommended when using dependency injection. In DI environments, inject the Application instance from your container instead.

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Next Steps

Now that LibreDTE Core is installed:

Quick Start

Create your first electronic invoice

Core Concepts

Understand the architecture and components

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Troubleshooting

LibreDTE Core requires PHP 8.5+. If you see version errors:
# Check your PHP version
php -v

# Update PHP or use a different version
composer config platform.php 8.5
Install required extensions based on your system:
# Debian/Ubuntu
sudo apt install php8.5-curl php8.5-mbstring php8.5-soap php8.5-xml

# macOS with Homebrew
brew install [email protected]
If Composer runs out of memory during installation:
COMPOSER_MEMORY_LIMIT=-1 composer require libredte/libredte-lib-core

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