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Informations about the package log4php
Xsga Log4PHP
A modern, PSR-compliant successor to Apache Log4PHP (now unmaintained).
Xsga Log4PHP is a heavily refactored and redesigned logging library for PHP, originally inspired by Apache Log4PHP and rebuilt for the current PHP ecosystem. It targets PHP 8.4+, follows PSR-3, ships with PSR-4 autoloading, and provides a flexible logging pipeline with appenders, layouts, context interpolation, and XML or programmatic configuration.
Table of Contents
- Why this project exists
- Key Features
- What makes it different
- Quick Start
- Basic Configuration
- Documentation
- Who should use this
- License
- Acknowledgements
📌 Why this project exists
Apache Log4PHP is no longer actively maintained and does not align with current PHP versions, tooling, or interoperability expectations.
This project exists to:
- Provide a conceptual successor for teams familiar with Apache Log4PHP
- Preserve the strengths of the original model while removing outdated constraints
- Modernize the architecture, code style, and runtime requirements
- Align the library with current PHP standards, especially PSR-3 and PSR-4
- Offer a maintainable codebase suitable for static analysis, code style checks, and ongoing development
✨ Key Features
- ✅ PSR-3 compatible logging interface and context placeholder interpolation
- ✅ PSR-4 autoloading support via Composer
- ✅ PHP 8.4+ compatibility
- ✅ XML-based and programmatic array-based configuration
- ✅ Multiple appenders, including File, DailyFile, RollingFile, Console, and Loki
- ✅ Multiple layouts, including Pattern, JSON, and Simple
- ✅ Full log level support from ALL through OFF, aligned with modern logging expectations
- ✅ Refactored architecture with cleaner separation of responsibilities
- ✅ Improved maintainability, extensibility, and static-analysis friendliness
🔍 What makes it different
Compared to the original Apache Log4PHP:
- The internals have been substantially refactored for modern PHP and stricter typing expectations
- The package is distributed as a Composer-first library with PSR-4 autoloading
- Logging follows the PSR-3 method set and context conventions
- Configuration remains familiar, but the implementation is cleaner and easier to maintain
- Appenders and layouts are designed for present-day use cases, including structured JSON output and Loki integration
- Development tooling now includes linting, PSR-12 style checks, and Psalm-based static analysis
For a detailed comparison, see:
👉 doc/differences-from-apache-log4php.md
🚀 Quick Start
Install via Composer:
Basic usage:
If you prefer to configure the library without XML, you can also pass a PHP array directly to Logger::configure().
⚙️ Basic Configuration
Configuration can be defined using XML or arrays.
XML example:
Programmatic example:
📚 Documentation
Project documentation is currently centered on the repository itself:
- Differences from Apache Log4PHP: doc/differences-from-apache-log4php.md
- Project documentation: doc/DOCUMENTATION.md
👥 Who should use this
This project is a good fit if you:
- Are currently using Apache Log4PHP and need a modern successor with a familiar mental model
- Need a PHP 8.4+ logging library with PSR-3 semantics
- Want XML-driven logging configuration without giving up programmatic configuration options
- Need appenders for local files, rolling files, console output, or Grafana Loki
- Prefer a lightweight logging library over larger framework-coupled solutions
📄 License
This project is based on Apache Log4PHP and remains licensed under the Apache 2.0 License. See LICENSE for details.
It includes substantial refactoring, modernization, and new implementation work tailored to the current PHP ecosystem.
🙌 Acknowledgements
- Apache Log4PHP
- Apache Software Foundation
