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Vendor kenod
Package invoice-generator
Short Description Professional PHP library for generating PDF invoices, proforma invoices, and other accounting documents with QR payment codes, IBAN validation, and multi-language support
License MIT

Keywords pdf TCPDF invoice IBAN billing czech faktura QR-Payment invoice-generator

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Informations about the package invoice-generator

Invoice Generator

Professional PHP library for generating PDF invoices, proforma invoices, credit notes, and other accounting documents with QR payment codes, IBAN validation, and multi-language support.

Migrating from v2.x? See the Migration Guide for step-by-step instructions.

Features

Multiple Document Types: Invoice, Proforma, Credit Note, Storno
VAT Calculations: Support for multiple VAT rates with automatic calculations
QR Payment Codes: Generate Czech QR payment codes (SPD format)
IBAN Validation: Validate and format Czech IBAN numbers
Electronic Signatures: PDF digital signature support
Multi-language: Easy localization with translation files
Professional Styling: Customizable colors, fonts, and branding
Barcode Support: 1D and 2D barcode generation
Customizable Margins: Adjustable top margin and signature area spacing
Type Safety: Full PHP 8.3+ type hints and strict types
Unit Tested: Comprehensive test coverage with PHPUnit

Requirements

PHP 8.3, 8.4 or 8.5
TCPDF library (automatically installed via Composer)
GD extension (for image handling)

Installation

Quick Start

Complete API Reference

InvoiceGenerator Class

Main class for generating invoices.

Core Methods

Settings Class

Accessed via $invoice->getSettings(). All methods return $this for chaining.

Basic Settings

PDF Metadata

Financial Settings

VAT Settings

Display Options

Styling

Page Margins

Images and Branding

QR Payment Codes

Barcodes

Electronic Signature

Final Recipient

Additional Information

Utility Methods

Address Class

Used for supplier, customer, and final recipient. Accessed via $invoice->getSupplier(), $invoice->getCustomer(), $invoice->getEndRecipient().

Information Class

Invoice information. Accessed via $invoice->getInformation().

PaymentDetails Class

Payment details. Accessed via $invoice->getPaymentDetails().

Iban Class

Static utility class for IBAN operations.

Translator Class

Static utility class for translations.

Advanced Usage Examples

Multiple Document Types

Complex Invoice with All Features

Reverse Charge Invoice

Getting Price Information

Testing

The library includes comprehensive unit tests with PHPUnit.

Running Tests

Test Coverage

The library includes 93 tests with 280 assertions covering:

InvoiceGenerator: Basic invoice generation, price calculations, VAT handling, discounts, rounding, deposits, reverse charge
Settings: Configuration options, fluent interface, type safety, all setter/getter methods
Address: All address fields and translation
Information: Date handling and custom parameters
PaymentDetails: Payment method configuration
InvoiceItem: All item properties and setters
Translator: Translation loading, key lookup, fallbacks
Comprehensive: All features working together, multi-document generation, clearData()
Price Calculations: Non-VAT payer, VAT payer, multiple rates, discounts, deposits, rounding

All tests use strict type checking and follow PHPUnit 11 best practices.

Code Quality

This library follows strict coding standards and includes automated quality checks:

Quality Tools

PHPStan Level 8: Strictest static analysis
PHP CodeSniffer: PSR-12 + Slevomat Coding Standard
PHPUnit 11: Latest testing framework
Strict Types: declare(strict_types=1) on all files

Localization

The library includes Czech (cs), Slovak (sk), and English (en) translations.

Available Translation Keys

All translation keys use English snake_case format:

Creating Custom Translations

Migration from Version 2.x

If you're upgrading from the old WFPfaktury class, please read the complete Migration Guide which includes:

Complete property name mapping
Complete method name mapping
Step-by-step migration instructions
Side-by-side code comparisons
List of removed deprecated methods

Quick example:

Old code (v2.x):

New code (v3.0):

Key Changes:

Namespace: WFPfaktury → Kenod\InvoiceGenerator
Main class: WFPfaktury → InvoiceGenerator
All method names now use camelCase: SetX() → setX()
All property names translated to English
PHP 8.3+ required
Deprecated methods removed
Email functionality removed (use external library)

See MIGRATION.md for complete details.

Examples

See the examples/ directory for complete working examples:

01_basic_invoice.php - Simple invoice with minimal setup
02_eet.php - Invoice with Electronic Registration of Sales (EET)
03_reverse_charge.php - Reverse charge invoice
04_translations.php - Using different languages
05_eco_print.php - Eco-friendly compact layout
06_images.php - Adding logos and images
07_custom_callback.php - Custom PDF modifications
08_english.php - English language invoice
09_multiple_documents.php - Multiple documents in one PDF
10_credit_note.php - Credit note with all features
11_comprehensive.php - Comprehensive test with all available features

See the examples README for detailed descriptions of each example.

Performance Tips

Reuse instance: Create one InvoiceGenerator instance and use clearData() between invoices
Disable features: Turn off unused features (QR codes, barcodes, signatures) for faster generation
Optimize images: Use compressed images with appropriate dimensions
Font subsetting: Enabled by default, reduces PDF size
Batch processing: Generate multiple invoices in one script execution

Troubleshooting

Common Issues

PDF not generating:

Check that TCPDF is installed: composer show tecnickcom/tcpdf
Verify PHP version: php -v (must be 8.3+)
Check error logs for TCPDF errors

QR codes not showing:

Verify account number format (with bank code)
Check that amount is > 0
Ensure QR payment is enabled: setQRPayment(true, ...)

Images not displaying:

Check file path is absolute or correct relative path
Verify GD extension is installed: php -m | grep -i gd
Supported formats: PNG, JPG, GIF

Wrong language:

Ensure language file exists in langs/ directory
Call setLanguage() before any translation occurs
Check translation key names (use English snake_case)

License

This project is licensed under the MIT License.

You are free to use, modify, and distribute this library in your commercial and non-commercial projects.

See the LICENSE file for full details.

Author

Petr Daněk - Original author
Email: [email protected]
Website: https://www.danekpetr.cz

Credits

Built on TCPDF library
Refactored for PHP 8.3+ compatibility
Follows Slevomat Coding Standard

Support

For issues and feature requests, please use the GitHub issue tracker.

Version

Current version: 3.0.9

Changelog

3.0.9

Fixed QR payment SPAYD string missing the currency (CC) parameter; the currency from settings is now included (ISO 4217), so banking apps no longer default to CZK

3.0.8

Added setDisplayDeposits() — hide the paid advances (deposits) row when it is disabled and the deposit amount is zero; the "total to pay" box shifts up to fill the gap. Non-zero deposits are always shown.

3.0.6

Added PHP 8.5 support
Added setMarginTop() — configurable top margin for page content (first page only or all pages), useful for larger logos in the header area
Added setSignatureMarginTop() — extra vertical space above the signature line for larger stamps or seals
Both margin settings are fully integrated with automatic page break calculations

3.0.5

Fixed QR payment generation from bank account number

3.0.4

VAT rate for items without a predefined VAT rate will be assigned dynamically

3.0.3

Added 3 new languages (DE, HU, PL) translations
Footer middle text added to translations

3.0.2

Fixed setRounding(0) bug
Added modifyTranslations() method in Translator
Added setHideFooterTexts() method in Settings

3.0.0

Complete refactoring for PHP 8.3+, English API, type safety, unit tests

2.x

Legacy WFPfaktury implementation

All versions of invoice-generator with dependencies

PHP Build Version

Package Version

Version v3.0.9 Release 13. Jun 2026
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Requires php Version ^8.3 || ^8.4 || ^8.5
tecnickcom/tcpdf Version ^6.2
ext-gd Version *

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