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Example code of weichie-com/blur

Informations about the package blur

Blur

PHP Version

A data protection and de-identification SDK for BeNeLux (Belgium, Netherlands, Luxembourg) and US identifiers, inspired by Microsoft Presidio.

Features

Installation

Install via Composer:

Or add to your composer.json:

Requirements

Quick Start

Usage Examples

1. Detecting BeNeLux National IDs

2. Detecting IBAN Codes

3. Multiple Anonymization Strategies

4. Context Enhancement

Boost detection confidence when context keywords appear near entities:

5. Entity Filtering

Detect only specific entity types:

6. Allow List

Whitelist specific values to ignore:

Supported Recognizers

BeNeLux-Specific

Entity Type Description Validation Country
NL_BSN Dutch Burgerservicenummer 11-proof checksum 🇳🇱 NL
BE_NATIONAL_NUMBER Belgian National Number mod-97 checksum 🇧🇪 BE
LU_NATIONAL_ID Luxembourg National ID Date validation 🇱🇺 LU
IBAN_CODE IBAN (BE/NL/LU) mod-97 checksum 🇧🇪🇳🇱🇱🇺
PHONE_NUMBER Phone numbers libphonenumber 🇧🇪🇳🇱🇱🇺

US-Specific

Entity Type Description Validation Country
US_SSN Social Security Number Area/group/serial rules 🇺🇸 US
US_ITIN Individual Taxpayer ID Format + digit ranges 🇺🇸 US
US_PASSPORT Passport Number Pattern (context-boosted) 🇺🇸 US
US_DRIVER_LICENSE Driver License Multi-state patterns 🇺🇸 US
US_BANK_NUMBER Bank Account Number Pattern (context-boosted) 🇺🇸 US
US_ABA_ROUTING ABA Routing Number Weighted checksum (mod 10) 🇺🇸 US

Generic

Entity Type Description Validation
EMAIL_ADDRESS Email addresses RFC validation
CREDIT_CARD Credit card numbers Luhn checksum
IP_ADDRESS IPv4/IPv6 addresses IP validation
URL URLs URL validation

Supported Operators

Operator Description Parameters
replace Replace with custom value new_value
redact Remove completely None
mask Partial/full masking masking_char, chars_to_mask, from_end
hash SHA-256/SHA-512 hashing algorithm (default: sha256)
encrypt AES-256-CBC encryption key
decrypt AES-256-CBC decryption key

Validation Algorithms

Luhn Checksum (Credit Cards)

Used to validate credit card numbers. Prevents false positives from random digit sequences.

Mod-97 Checksum (IBAN, Belgian National Number)

ISO 7064 mod-97 algorithm for IBAN codes and Belgian National Numbers.

11-Proof Checksum (Dutch BSN)

Dutch "elfproef" (11-check) algorithm for validating BSN numbers.

ABA Routing Checksum (US ABA Routing)

Weighted sum mod-10 algorithm (weights: 3, 7, 1) for validating US ABA routing numbers.

Architecture

Design Principles

  1. Simple but Complete: Focus on core functionality without ML/NLP complexity
  2. Pattern-Based: Fast regex matching with validation for accuracy
  3. Type-Safe: PHP 8.1+ with strict types throughout
  4. UTF-8 First: Proper multibyte string handling everywhere
  5. Extensible: Easy to add custom recognizers and operators
  6. Immutable Results: Thread-safe result objects

Performance

Examples

See examples/benelux_example.php for a comprehensive demonstration including:

Run it:

Contributing

Contributions are welcome! To add support for additional countries:

  1. Create a recognizer in src/Analyzer/Recognizers/CountryName/
  2. Extend PatternRecognizer or implement EntityRecognizer
  3. Add validation logic (checksum, format, etc.)
  4. Include context words in local language(s)
  5. Add tests and examples

License

MIT License - See LICENSE file for details

Credits

This project is inspired by Microsoft Presidio. Special thanks to the Presidio team for their excellent work on PII detection and de-identification.

Roadmap

Support

For issues, questions, or contributions, please visit the GitHub repository.

All versions of blur with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
ext-mbstring Version *
ext-openssl Version *
giggsey/libphonenumber-for-php Version ^8.13
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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