A curated list of amazingly awesome PHP libraries, resources and shiny things.

Please see CONTRIBUTING, CODE-OF-CONDUCT and COLLABORATING for details.

• Awesome PHP
  • Composer Repositories
  • Dependency Management
  • Dependency Management Extras
  • Frameworks
  • Framework Extras
  • Content Management Systems
  • Components
  • Micro Frameworks
  • Micro Framework Extras
  • Routers
  • Templating
  • Static Site Generators
  • HTTP
  • Scraping
  • Middlewares
  • URL
  • Email
  • Files
  • Streams
  • Dependency Injection
  • Imagery
  • Testing
  • Continuous Integration
  • Documentation
  • Security
  • Passwords
  • Code Analysis
  • Code Quality
  • Static Analysis
  • Architectural
  • Debugging and Profiling
  • Build Tools
  • Task Runners
  • Navigation
  • Asset Management
  • Geolocation
  • Date and Time
  • Event
  • Logging
  • E-commerce
  • PDF
  • Office
  • Database
  • Migrations
  • NoSQL
  • Queue
  • Search
  • Command Line
  • Authentication and Authorization
  • Markup
  • Strings
  • Numbers
  • Filtering and Validation
  • API
  • Caching
  • Data Structure and Storage
  • Notifications
  • Deployment
  • Internationalisation and Localisation
  • Serverless
  • Configuration
  • Third Party APIs
  • Extensions
  • Miscellaneous
• Software
  • PHP Installation
  • Development Environment
  • Virtual Machines
  • Text Editors and IDEs
  • Web Applications
  • Infrastructure
• Resources
  • PHP Websites
  • PHP Books
  • PHP Videos
  • PHP Podcasts
  • PHP Newsletters
  • PHP Magazines
  • PHP Reading
  • PHP Internals Reading

Composer Repositories.

• Firegento - Magento Module Composer Repository.
• Packagist - The PHP Package Repository.
• Private Packagist - Composer package archive as a service for PHP.
• WordPress Packagist - Manage your plugins with Composer.

Libraries for dependency and package management.

• Composer Installers - A multi framework Composer library installer.
• Composer - A package and dependency manager.
• Melody - A tool to build one file Composer scripts.
• Pickle - A PHP extension installer.

Extras related to dependency management.

• Composed - A library to parse your project's Composer environment at runtime.
• Composer Merge Plugin - A composer plugin to merge several composer.json files.
• Prestissimo - A composer plugin which enables parallel install process.
• Repman - A private PHP package repository manager and Packagist proxy.
• Satis - A static Composer repository generator.
• tooly - A library to manage PHAR files in project using Composer.
• Toran Proxy - A static Composer repository and proxy.

Web development frameworks.

• CakePHP - A rapid application development framework.
• Laminas - A framework comprised of individual components (previously Zend Framework).
• Laravel - A web application framework with expressive, elegant syntax.
• Nette - A web framework comprised of mature components.
• Phalcon - A framework implemented as a C extension.
• Spiral - A high performance PHP/Go framework.
• Symfony - A set of reuseable components and a web framework.
• Yii2 - A fast, secure, and efficient web framework.

Extras related to web development frameworks.

• CakePHP CRUD - A Rapid Application Development (RAD) plugin for CakePHP.
• Knp RAD Components - A set of Rapid Application Development (RAD) components for Symfony.
• LaravelS - Glue for using Swoole in Laravel or Lumen.
• Symfony CMF - A Content Management Framework to create custom CMS.

Tools for managing digital content.

• Backdrop - A CMS targeting small-to-medium sized business and non-profits (a fork of Drupal).
• Concrete5 - A CMS targeting users with a minimum of technical skills.
• CraftCMS - A flexible, user-friendly CMS for creating custom digital experiences on the web and beyond.
• Drupal - An enterprise level CMS.
• Grav - A modern flat-file CMS.
• Joomla - Another leading CMS.
• Kirby - A flat-file CMS that adapts to any project.
• Magento - The most popular ecommerce platform.
• Moodle - An open-source learning platform.
• Pico CMS - A stupidly simple, blazing fast, flat file CMS.
• Statamic - Build beautiful, easy to manage websites.
• WordPress - A blogging platform and CMS.

Standalone components from web development frameworks and development groups.

• Aura - Independent components, fully decoupled from each other and from any framework.
• CakePHP Plugins - A directory of CakePHP plugins.
• Hoa Project - Another package of PHP components.
• Laravel Components - The Laravel Framework components.
• League of Extraordinary Packages - A PHP package development group.
• Spatie Open Source - A collection of open source PHP and Laravel packages.
• Symfony Components - The components that make Symfony.
• Laminas Components - The components that make the Laminas Framework.

Micro frameworks and routers.

• Laravel-Zero - A micro-framework for console applications.
• Lumen - A micro-framework by Laravel.
• Mezzio - A micro-framework by Laminas.
• Radar - An Action-Domain-Responder implementation for PHP.
• Silly - A micro-framework for CLI applications.
• Slim - Another simple micro framework.

Extras related to micro frameworks and routers.

• Slim Skeleton - A skeleton for Slim.
• Slim Twig View - Integrate Twig into Slim.
• Slim PHP View - A simple PHP renderer for Slim.

Libraries for handling application routing.

• Aura.Router - A full-featured routing library.
• Fast Route - A fast routing library.
• Klein - A flexible router.
• Pux - Another fast routing library.
• Route - A routing library built on top of Fast Route.

Libraries and tools for templating and lexing.

• MtHaml - A PHP implementation of the HAML template language.
• Mustache - A PHP implementation of the Mustache template language.
• PHPTAL - A PHP implementation of the TAL templating language.
• Plates - A native PHP templating library.
• Smarty - A template engine to complement PHP.
• Twig - A comprehensive templating language.

Tools for pre-processing content to generate web pages.

• Couscous - Couscous turns Markdown documentation into beautiful websites. It's GitHub Pages on steroids.
• Sculpin - A tool that converts Markdown and Twig into static HTML.
• Spress - An extensible tool that converts Markdown and Twig into HTML.

Libraries for working with HTTP.

• Buzz - Another HTTP client.
• Guzzle - A comprehensive HTTP client.
• HTTPlug - An HTTP client abstraction without binding to a specific implementation.
• Nyholm PSR-7 - A super lightweight PSR-7 implementation. Very strict and very fast.
• PHP VCR - A library for recording and replaying HTTP requests.
• Requests - A simple HTTP library.
• Retrofit - A library to ease creation of REST API clients.
• Symfony HTTP Client - A component to fetch HTTP resources synchronously or asynchronously.
• Laminas Diactoros - PSR-7 HTTP Message implementation.

Libraries for scraping websites.

• DiDOM - A super fast HTML scrapper and parser.
• Embed - An information extractor from any web service or page.
• Goutte - A simple web scraper.
• Symfony Panther - A browser testing and web crawling library for PHP and Symfony.
• PHP Spider - A configurable and extensible PHP web spider.

Libraries for building application using middlewares.

• PSR-7 Middlewares - Inspiring collection of handy middlewares.
• Relay - A PHP 5.5 PSR-7 middleware dispatcher.
• Stack - A library of stackable middleware for Symfony.
• Laminas Stratigility - Middleware for PHP built on top of PSR-7.

Libraries for parsing URLs.

• PHP Domain Parser - A domain suffix parser library.
• Purl - A URL manipulation library.
• sabre/uri - A functional URI manipulation library.
• Uri - Another URL manipulation library.

Libraries for sending and parsing email.

• CssToInlineStyles - A library to inline CSS in email templates.
• Email Reply Parser - An email reply parser library.
• Email Validator - A small email address validation library.
• Fetch - An IMAP library.
• Mautic - Email marketing automation
• PHPMailer - Another mailer solution.
• PHP IMAP - A library to access mailboxes via POP3, IMAP and NNTP.
• Stampie - A library for email services such as SendGrid, PostMark, MailGun and Mandrill.
• SwiftMailer - A mailer solution.
• Symfony Mailer - A powerful library for creating and sending emails.

Libraries for file manipulation and MIME type detection.

• CSV - A CSV data manipulation library.
• Flysystem - Abstraction for local and remote filesystems.
• Gaufrette - A filesystem abstraction layer.
• Hoa Mime - Another MIME detection library.
• PHP FFmpeg - A wrapper for the FFmpeg video library.
• UnifiedArchive - A unified reader and writer of compressed archives.

Libraries for working with streams.

• ByteStream - An asynchronous stream abstraction.
• Streamer - A simple object-orientated stream wrapper library.

Libraries that implement the dependency injection design pattern.

• Aura.Di - A serializable dependency injection container with constructor and setter injection, interface and trait awareness, configuration inheritance, and much more.
• Acclimate - A common interface to dependency injection containers and service locators.
• Auryn - A recursive dependency injector.
• Container - Another flexible dependency injection container.
• Disco - A PSR-11 compatible, annotation-based dependency injection container.
• PHP-DI - A dependency injection container that supports autowiring.
• Pimple - A tiny dependency injection container.
• Symfony DI - A dependency injection container component.

Libraries for manipulating images.

• Color Extractor - A library for extracting colours from images.
• Glide - An on-demand image manipulation library.
• Image Hash - A library for generating perceptual image hashes.
• Image Optimizer - A library for optimizing images.
• Imagine - An image manipulation library.
• Intervention Image - Another image manipulation library.
• PHP Image Workshop - Another image manipulation library.

Libraries for testing codebases and generating test data.

• Alice - An expressive fixture generation library.
• AspectMock - A mocking framework for PHPUnit/Codeception.
• Atoum - A simple testing library.
• Behat - A behaviour driven development (BDD) testing framework.
• Codeception - A full stack testing framework.
• Faker - A fake data generator library.
• HTTP Mock - A library for mocking HTTP requests in unit tests.
• Infection - An AST-based PHP Mutation testing framework.
• Kahlan - Full stack Unit/BDD testing framework with built-in stub, mock and code-coverage support.
• Mink - Web acceptance testing.
• Mockery - A mock object library for testing.
• ParaTest - A parallel testing library for PHPUnit.
• Pest - A testing framework with a focus on simplicity.
• Peridot - An event driven test framework.
• Phake - Another mock object library for testing.
• Pho - Another behaviour driven development testing framework.
• PHP-Mock - A mock library for built-in PHP functions (e.g. time()).
• PHPSpec - A design by specification unit testing library.
• PHPT - A test tool used by PHP itself.
• PHPUnit - A unit testing framework.
• Prophecy - A highly opinionated mocking framework.
• VFS Stream - A virtual filesystem stream wrapper for testing.

Libraries and applications for continuous integration.

• CircleCI - A continuous integration platform.
• GitlabCi - Let GitLab CI test, build, deploy your code. TravisCi like.
• Jenkins - A continuous integration platform with PHP support.
• JoliCi - A continuous integration client written in PHP and powered by Docker.
• PHPCI - An open source continuous integration platform for PHP.
• SemaphoreCI - A continuous integration platform for open source and private projects.
• Shippable - A Docker based continious integration platform for open source and private projects.
• Travis CI - A continuous integration platform.
• Setup PHP - A GitHub Action for PHP.

Libraries for generating project documentation.

• APIGen - Another API documentation generator.
• daux.io - A documentation generator which uses Markdown files.
• PHP Documentor 2 - A documentation generator.
• phpDox - A documentation generator for PHP projects (that is not limited to API documentation).

Libraries for generating secure random numbers, encrypting data and scanning and testing for vulnerabilities.

• Halite - A simple library for encryption using libsodium.
• HTML Purifier - A standards compliant HTML filter.
• IniScan - A tool that scans PHP INI files for security.
• Optimus - Id obfuscation based on Knuth's multiplicative hashing method.
• PHPGGC - A library of PHP unserializeable payloads along with a tool to generate them.
• PHP Encryption - Secure PHP Encryption Library.
• PHP SSH - An experimental object orientated SSH wrapper library.
• PHPSecLib - A pure PHP secure communications library.
• random_compat - PHP 5.x support for random_bytes() and random_int()
• RandomLib - A library for generating random numbers and strings.
• Symfony Security Monitoring - A web tool to check your Composer dependencies for security advisories, previously known as "SensioLabs Security Check".
• SQLMap - An automatic SQL injection and database takeover tool.
• TCrypto - A simple encrypted key-value storage library.
• VAddy - A continuous security testing platform for web applications.
• Zap - An integrated penetration testing tool for web applications.

Libraries and tools for working with and storing passwords.

• GenPhrase - A library for generating secure random passphrases.
• Password Compat - A compatibility library for the new PHP 5.5 password functions.
• Password Policy - A password policy library for PHP and JavaScript.
• Password Validator - A library for validating and upgrading password hashes.
• Password-Generator - PHP library to generate random passwords.
• PHP Password Lib - A library for generating and validating passwords.
• phpass - A portable password hashing framework.
• Zxcvbn PHP - A realistic PHP password strength estimate library based on Zxcvbn JS.

Libraries and tools for analysing, parsing and manipulating codebases.

• Better Reflection - AST-based reflection library that allows analysis and manipulation of code
• Code Climate - An automated code review.
• PHP Parser - A PHP parser written in PHP.
• PHP Semantic Versioning Checker - A command line utility that compares two source sets and determines the appropriate semantic versioning to apply.
• Phpactor - PHP completion, refactoring and introspection tool.
• PHPLOC - A tool for quickly measuring the size of a PHP project.
• PHPQA - A tool for running QA tools (phploc, phpcpd, phpcs, pdepend, phpmd, phpmetrics).
• Qafoo Quality Analyzer - A tool to visualize metrics and source code.
• Rector - A tool to upgrade and refactor code.
• Scrutinizer - A web tool to scrutinise PHP code.
• UBench - A simple micro benchmark library.

Libraries for managing code quality, formatting and linting.

• PHP CodeSniffer - A library that detects PHP, CSS and JS coding standard violations.
• PHP CS Fixer - A coding standards fixer library.
• PHP Mess Detector - A library that scans code for bugs, sub-optimal code, unused parameters and more.
• PHPCheckstyle - A tool to help adhere to certain coding conventions.
• PHPCPD - A library that detects copied and pasted code.

Libraries for performing static analysis of PHP code.

• Exakat - A static analysis engine for PHP.
• Deptrac - A static code analysis tool that helps to enforce rules for dependencies between software layers.
• Mondrian - A code analysis tool using Graph Theory.
• phan - A static analyzer based on PHP 7 and the php-ast extension.
• PHP Architecture Tester - Easy to use architecture testing tool for PHP.
• PHPCompatibility - A PHP compatibility checker for PHP CodeSniffer.
• PhpDependencyAnalysis - A tool to create customisable dependency graphs.
• PHP Metrics - A static metric library.
• PHP Migration - A static analyzer for PHP version migration.
• PHPStan - A PHP Static Analysis Tool.
• Psalm - A static analysis tool for finding errors in PHP applications.

Libraries related to design patterns, programming approaches and ways to organize code.

• Design Patterns PHP - A repository of software patterns implemented in PHP.
• Finite - A simple PHP finite state machine.
• Functional PHP - A functional programming library.
• Iter - A library that provides iteration primitives using generators.
• Patchwork - A library for redefining userland functions.
• Pipeline - A pipeline pattern implementation.
• Porter - Data import abstraction library for consuming Web APIs and other data sources.
• Ruler - A simple stateless production rules engine.
• RulerZ - A powerful rule engine and implementation of the Specification pattern.

Libraries and tools for debugging errors and profiling code.

• APM - Monitoring extension collecting errors and statistics into SQLite/MySQL/StatsD.
• Barbushin PHP Console - Another web debugging console using Google Chrome.
• Blackfire.io - A low-overhead code profiler.
• Kint - A debugging and profiling tool.
• PCOV - A self contained code coverage compatible driver.
• PHP Console - A web debugging console.
• PHP Debug Bar - A debugging toolbar.
• PHPBench - A benchmarking Framework.
• PHPSpy - A low-overhead sampling profiler.
• Symfony VarDumper - A variable dumper component.
• Tideways.io - Monitoring and profiling tool.
• Tracy - A simple error detection, logging and time measuring library.
• Whoops - A pretty error handling library.
• xDebug - A debug and profile tool for PHP.
• XHProf - A profiling tool originally developed by Facebook.
• Z-Ray - A debug and profile tool for Zend Server.

Project build and automation tools.

• Box - A utility to build PHAR files.
• Construct - A PHP project/micro-package generator.
• Phing - A PHP project build system inspired by Apache Ant.

Libraries for automating and running tasks.

• Bldr - A PHP Task runner built on Symfony components.
• Jobby - A PHP cron job manager without modifying crontab.
• Robo - A PHP Task runner with object-orientated configurations.
• Task - A pure PHP task runner inspired by Grunt and Gulp.

Tools for building navigation structures.

• KnpMenu - A menu library.
• Menu - A flexible menu library with a fluent interface.

Tools for managing, compressing and minifying website assets.

• JShrink - A JavaScript minifier library.
• Laravel Mix - An elegant wrapper around Webpack for the 80% use case.
• Symfony Asset - Manages URL generation and versioning of web assets.
• Symfony Encore - A simple but powerful API for processing and compiling assets built around Webpack.

Libraries for geocoding addresses and working with latitudes and longitudes.

• GeoCoder - A geocoding library.
• GeoJSON - A GeoJSON implementation.
• GeoTools - A library of geo-related tools.
• PHPGeo - A simple geo library.

Libraries for working with dates and times.

• CalendR - A calendar management library.
• Carbon - A simple DateTime API extension.
• Chronos - A DateTime API extension supporting both mutable and immutable date/time.
• Moment.php - Moment.js inspired PHP DateTime handler with i18n support.
• Yasumi - An library to help you calculate the dates and names of holidays.

Libraries that are event-driven or implement non-blocking event loops.

• Amp - An event driven non-blocking I/O library.
• Broadway - An event source and CQRS library.
• CakePHP Event - An event dispatcher library.
• Elephant.io - Yet another web socket library.
• Evenement - An event dispatcher library.
• Event - An event library with a focus on domain events.
• Hoa EventSource - An event source library.
• Hoa WebSocket - Another web socket library.
• Prooph Event Store - An event source component to persist event messages
• PHP Defer - Golang's defer statement for PHP.
• Ratchet - A web socket library.
• ReactPHP - An event driven non-blocking I/O library.
• RxPHP - A reactive extension library.
• Swoole - An event-driven asynchronous and concurrent networking communication framework with high performance for PHP written in C.
• Workerman - An event driven non-blocking I/O library.

Libraries for generating and working with log files.

• Monolog - A comprehensive logger.

Libraries and applications for taking payments and building online e-commerce stores.

• Money - A PHP implementation of Fowler's money pattern.
• Brick\Money - A money library for PHP, with support for contexts, cash roundings, currency conversion.
• OmniPay - A framework agnostic multi-gateway payment processing library.
• Payum - A payment abstraction library.
• Shopware - Highly customizable e-commerce software
• Swap - An exchange rates library.
• Sylius - An open source e-commerce solution.

Libraries and software for working with PDF files.

• Dompdf - A HTML to PDF converter.
• PHPPdf - A library for generating PDFs and images from XML.
• Snappy - A PDF and image generation library.
• WKHTMLToPDF - A tool to convert HTML to PDF.

Libraries for working with office suite documents.

• PHPPowerPoint - A library for working with Microsoft PowerPoint Presentations.
• PHPWord - A library for working with Microsoft Word documents.
• PHPSpreadsheet - A pure PHP library for reading and writing spreadsheet files (successor of PHPExcel).
• Spout - Read and write spreadsheet files (CSV, XLSX and ODS), in a fast and scalable way .

Libraries for interacting with databases using object-relational mapping (ORM) or datamapping techniques.

• Atlas.Orm - A data mapper implementation for your persistence model in PHP.
• Aura.Sql - Provides an extension to the native PDO along with a profiler and connection locator.
• Aura.SqlQuery - Independent query builders for MySQL, PostgreSQL, SQLite, and Microsoft SQL Server.
• Baum - A nested set implementation for Eloquent.
• CakePHP ORM - Object-Relational Mapper, implemented using the DataMapper pattern.
• Cycle ORM - PHP DataMapper, ORM.
• Doctrine Extensions - A collection of Doctrine behavioural extensions.
• Doctrine - A comprehensive DBAL and ORM.
• Laravel Eloquent - A simple ORM.
• Pomm - An Object Model Manager for PostgreSQL.
• ProxyManager - A set of utilities to generate proxy objects for data mappers.
• RedBean - A lightweight, configuration-less ORM.
• Spot2 - A MySQL datamapper ORM.

Libraries to help manage database schemas and migrations.

• Doctrine Migrations - A migration library for Doctrine.
• Migrations - A migration management library.
• Phinx - Another database migration library.
• PHPMig - Another migration management library.
• Ruckusing - Database migrations for PHP ala ActiveRecord Migrations with support for MySQL, Postgres, SQLite.

Libraries for working with "NoSQL" backends.

• PHPMongo - A MongoDB ORM.
• Predis - A feature complete Redis library.

Libraries for working with event and task queues.

• Bernard - A multibackend abstraction library.
• BunnyPHP - A performant pure-PHP AMQP (RabbitMQ) sync and also async (ReactPHP) library.
• Pheanstalk - A Beanstalkd client library.
• PHP AMQP - A pure PHP AMQP library.
• Tarantool Queue - PHP bindings for Tarantool Queue.
• Thumper - A RabbitMQ pattern library.
• Enqueue - A message queue packages for PHP that supports RabbitMQ, AMQP, STOMP, Amazon SQS, Redis and Doctrine transports.

Libraries and software for indexing and performing search queries on data.

• Elastica - A client library for ElasticSearch.
• ElasticSearch PHP - The official client library for ElasticSearch.
• Solarium - A client library for Solr.
• Sphinx Search - Sphinx Search library provides SphinxQL indexing and searching features
• SphinxQL query builder - A query library for the Sphinx search engine.

Libraries related to the command line.

• Aura.Cli - Provides the equivalent of request ( Context ) and response ( Stdio ) objects for the command line interface, including Getopt support, and an independent Help object for describing commands.
• Boris - A tiny PHP REPL.
• Cilex - A micro framework for building command line tools.
• CLI Menu - A library for building CLI menus.
• CLIFramework - A command-line framework supports zsh/bash completion generation, subcommands and option constraints. It also powers phpbrew.
• CLImate - A library for outputting colours and special formatting.
• Commando - Another simple command line opt parser.
• Cron Expression - A library to calculate cron run dates.
• GetOpt - A command line opt parser.
• GetOptionKit - Another command line opt parser.
• Hoa Console - Another command line library.
• PsySH - Another PHP REPL.
• ShellWrap - A simple command line wrapper library.

Libraries for implementing user authentication and authorization.

• Aura.Auth - Provides authentication functionality and session tracking using various adapters.
• SocialConnect Auth - An open source social sign (OAuth1\OAuth2\OpenID\OpenIDConnect).
• Json Web Token - Json Tokens to authenticate and transmit information.
• OAuth 1.0 Client - An OAuth 1.0 client library.
• OAuth 2.0 Client - An OAuth 2.0 client library.
• OAuth2 Server - Another OAuth2 server implementation.
• OAuth2 Server - An OAuth2 authentication server, resource server and client library.
• Opauth - A multi-provider authentication framework.
• PHP oAuthLib - Another OAuth library.
• Sentinel Social - A library for social network authentication.
• Sentinel - A framework agnostic authentication & authorisation library.
• TwitterOAuth - A Twitter OAuth library.

Libraries for working with markup.

• Cebe Markdown - An fast and extensible Markdown parser.
• CommonMark PHP - Highly-extensible Markdown parser which fully supports the CommonMark spec.
• Decoda - A lightweight markup parser library.
• Emoji - A library that converts unicode characters and names into emoji images.
• HTML to Markdown - Converts HTML into Markdown.
• HTML5 PHP - An HTML5 parser and serializer library.
• Parsedown - Another Markdown parser.
• PHP Markdown - A Markdown parser.

Libraries for parsing and manipulating strings.

• Agent - A PHP desktop/mobile user agent parser, based on Mobiledetect.
• ANSI to HTML5 - An ANSI to HTML5 converter library.
• Color Jizz - A library for manipulating and converting colours.
• Device Detector - Another library for parsing user agent strings.
• Hoa String - Another UTF-8 string library.
• Jieba-PHP - A PHP port of Python's jieba. Chinese text segmentation for natural language processing.
• Mobile-Detect - A lightweight PHP class for detecting mobile devices (including tablets).
• Patchwork UTF-8 - A portable library for working with UTF-8 strings.
• Portable UTF-8 - A string manipulation library with UTF-8 safe replacement methods.
• Slugify - A library to convert strings to slugs.
• SQL Formatter - A library for formatting SQL statements.
• Stringy - A string manipulation library with multibyte support.
• UA Parser - A library for parsing user agent strings.
• URLify - A PHP port of Django's URLify.js.
• UUID - A library for generating UUIDs.

Libraries for working with numbers.

• Brick\Math - A library providing large number support: BigInteger, BigDecimal and BigRational.
• ByteUnits - A library to parse, format and convert byte units in binary and metric systems.
• LibPhoneNumber for PHP - A PHP implementation of Google's phone number handling library.
• PHP Conversion - Another library for converting between units of measure.
• PHP Units of Measure - A library for converting between units of measure.
• MathPHP - A math library for PHP.

Libraries for filtering and validating data.

• Assert - A validation library with a rich set of assertions. Supports assertion chaining and lazy assertions.
• Aura.Filter - Provides tools to validate and sanitize objects and arrays.
• CakePHP Validation - Another validation library.
• Filterus - A simple PHP filtering library.
• ISO-codes - A library for validating inputs according standards from ISO, International Finance, Public Administrations, GS1, Book Industry, Phone numbers & Zipcodes for many countries.
• JSON Schema - A JSON Schema validation library.
• MetaYaml - A schema validation library that supports YAML, JSON and XML.
• Respect Validation - A simple validation library.
• Upload - A library for handling file uploads and validation.
• Valitron - Another validation library.
• Volan - Another simplified validation library.

Libraries and web tools for developing APIs.

• API Platform - Expose in minutes an hypermedia REST API that embraces JSON-LD, Hydra format.
• Laminas API Tool Skeleton - An API builder built with the Laminas Framework.
• Drest - A library for exposing Doctrine entities as REST resource endpoints.
• HAL - A Hypertext Application Language (HAL) builder library.
• Hateoas - A HATEOAS REST web service library.
• Negotiation - A content negotiation library.
• Restler - A lightweight framework to expose PHP methods as RESTful web API.
• wsdl2phpgenerator - A tool to generate PHP classes from SOAP WSDL files.

Libraries for caching data.

• APIx Cache - A thin PSR-6 cache wrapper to various caching backends emphasising cache tagging and indexing.
• CacheTool - A tool to clear APC/opcode caches from the command line.
• CakePHP Cache - A caching library.
• Doctrine Cache - A caching library.
• Metaphore - Cache slam defense using a semaphore to prevent dogpile effect.
• Stash - Another library for caching.
• Laminas Cache - Another caching library.

Libraries that implement data structure or storage techniques.

• CakePHP Collection - A simple collections library.
• Fractal - A library for converting complex data structures to JSON output.
• Ginq - Another PHP library based on .NET's LINQ.
• JsonMapper - A library that maps nested JSON structures onto PHP classes.
• JSON Machine - Provides iteration over huge JSONs using simple foreach
• Knapsack - Collection library inspired by Clojure's sequences.
• msgpack.php - A pure PHP implementation of the MessagePack serialization format.
• PINQ - A PHP library based on .NET's LINQ (Language Integrated Query).
• Serializer - A library for serialising and de-serialising data.
• YaLinqo - Yet Another LINQ to Objects for PHP.
• Laminas Serializer - Another library for serialising and de-serialising data.

Libraries for working with notification software.

• JoliNotif - A cross-platform library for desktop notification (support for Growl, notify-send, toaster, etc)
• Notification Pusher - A standalone library for device push notifications.
• Notificato - A library for handling push notifications.
• Notificator - A lightweight notification library.
• Php-pushwoosh - A PHP Library to easily send push notifications with the Pushwoosh REST Web Services.

Libraries for project deployment.

• Deployer - A deployment tool.
• Envoy - A tool to run SSH tasks with PHP.
• Rocketeer - A fast and easy deployer for the PHP world.

Libraries for Internationalization (I18n) and Localization (L10n).

• Aura.Intl - Provides internationalization (I18N) tools, specifically package-oriented per-locale message translation.
• CakePHP I18n - Message translation and localization for dates and numbers.

Libraries and tools to help build serverless web applications.

• Bref - Serverless PHP on AWS Lambda.
• OpenWhisk - An open-source serverless cloud platform.
• Serverless Framework - An open-source framework for building serverless applications.
• Laravel Vapor - A serverless deployment platform for Laravel, powered by AWS.

Libraries and tools for configuration.

• PHP Dotenv - Parse and load environment variables from .env files.
• Symfony Dotenv- Parse and load environment variables from .env files.
• Yo! Symfony TOML - A PHP parser for TOML.

Libraries for accessing third party APIs.

• Amazon Web Service SDK - The official PHP AWS SDK library.
• AsyncAWS - An unofficial asynchronous PHP AWS SDK.
• Campaign Monitor - The official Campaign Monitor PHP library.
• Github - A library to interface with the Github API.
• Mailgun The official Mailgun PHP API.
• Square - The official Square PHP SDK for payments and other Square APIs.
• Stripe - The official Stripe PHP library.
• Twilio - The official Twilio PHP REST API.

Libraries to help build PHP extensions.

• PHP CPP - A C library for developing PHP extensions.
• Zephir - A compiled language between PHP and C for developing PHP extensions.

Useful libraries or tools that don't fit in the categories above.

• Annotations - An annotations library (part of Doctrine).
• BotMan - A framework agnostic PHP library to build cross-platform chat bots.
• CakePHP Utility - Utility classes such as Inflector, String, Hash, Security and XML.
• Chief - A command bus library.
• ClassPreloader - A library for optimising autoloading.
• Country List - A list of all countries with names and ISO 3166-1 codes.
• Embera - An Oembed consumer library.
• Essence - A library for extracting web media.
• Expose - An open source PHP tunneling service.
• Graphviz - A Graphviz library.
• Hprose-PHP - A very newbility RPC Library, support 25 languages now.
• JSON Lint - A JSON lint utility.
• JSONPCallbackValidator - A library for validating JSONP callbacks.
• Lock - A lock library to provide exclusive execution.
• Metrics - A simple metrics API library.
• noCAPTCHA - Helper for Google's noCAPTCHA (reCAPTCHA).
• Nmap - A PHP wrapper around Nmap.
• Pagerfanta - A pagination library.
• PHP PassBook - A PHP library for iOS PassBook.
• PHP-ML - A library for Machine Learning in PHP.
• PHPCR - A PHP port of the Java Content Repository (JCR).
• PHPStack - A TCP/IP stack proof of concept written in PHP.
• print_o - An object graph visualizer.
• Procrastinator - A library for running time consuming tasks.
• Prooph Service Bus - Lightweight message bus supporting CQRS and Micro Services
• RMT - A library for versioning and releasing software.
• sabre/vobject - A library for parsing VCard and iCalendar objects.
• Safe - All PHP functions, rewritten to throw exceptions instead of returning false.
• Slimdump - An easy dumper tool for MySQL.
• Spork - A process forking library.
• SuperClosure - A library that allows Closures to be serialized.
• Underscore - A PHP port of the Underscore JS library.

Software for creating a development environment.

Tools to help install and manage PHP on your computer.

• Brew PHP Switcher - Brew PHP switcher.
• HomeBrew - A package manager for OSX.
• Laravel Valet - A development environment for macOS.
• PHP Brew - A PHP version manager and installer.
• PHP Build - Another PHP version installer.
• PHP OSX - A PHP installer for OSX.

Software and tools for creating a sandboxed development environment.

• Ansible - A radically simple orchestration framework.
• Docker - A containerization platform.
• Laravel Homestead - A local development environment for Laravel.
• Laradock - A full PHP development environment based on Docker.
• Puppet - A server automation framework and application.
• Vagrant - A portable development environment utility.
• Vessel - Simple Docker development environments for Laravel.

Alternative PHP virtual machines.

• Hack - A programming language for HHVM.
• HHVM - A Virtual Machine, Runtime and JIT for PHP by Facebook.
• PeachPie - PHP compiler and runtime for .NET and .NET Core.

Text Editors and Integrated Development Environments (IDE) with support for PHP.

• Eclipse for PHP Developers - A PHP IDE based on the Eclipse platform.
• Apache NetBeans - An IDE with support for PHP and HTML5.
• PhpStorm - A commercial PHP IDE.
• VS Code - An open source code editor.

Web-based applications and tools.

• 3V4L - An online PHP & HHVM shell.
• DBV - A database version control application.
• PHP Queue - An application for managing queueing backends.
• MailCatcher - A web tool for capturing and viewing emails.
• Cachet - The open source status page system.
• phpRedisAdmin - A simple web interface to manage Redis databases.
• phpMyAdmin - A web interface for MySQL/MariaDB.
• Adminer - Database management in a single PHP file.
• Lychee - An easy to use and great looking photo-management-system.

Infrastructure for providing PHP applications and services.

• appserver.io - A multithreaded application server for PHP, written in PHP.
• php-pm - A process manager, supercharger and load balancer for PHP applications.
• RoadRunner - High-performance PHP application server, load-balancer and process manager.

Various resources, such as books, websites and articles, for improving your PHP development skills and knowledge.

Useful PHP-related websites.

• libs.garden: PHP - An overview of fastest growing PHP libraries.
• Nomad PHP - A online PHP learning resource.
• PHP Annotated Monthly - A monthly digest of PHP news.
• PHP Best Practices - A PHP best practice guide.
• PHP FIG - The PHP Framework Interoperability Group.
• PHP Package Development Standards - Package development standards for PHP.
• PHP School - Open Source Learning for PHP.
• PHP Security - A guide to PHP security.
• PHP The Right Way - A PHP best practice quick reference guide.
• PHP UG - A website to help people locate their nearest PHP user group (UG).
• PHP Versions - Lists which versions of PHP are available on several popular web hosts.
• PHP Weekly - A weekly PHP newsletter.
• Securing PHP - A newsletter about PHP security and library recommendations.
• Seven PHP - A website that interviews members of the PHP community.

Fantastic PHP-related books.

• Domain-Driven Design in PHP - Real examples written in PHP showcasing DDD Architectural Styles.
• Functional Programming in PHP - This book will show you how to leverage these new PHP5.3 features by understanding functional programming principles
• Grumpy PHPUnit - A book about unit testing with PHPUnit by Chris Hartjes.
• Mastering Object-Orientated PHP - A book about object-orientated PHP by Brandon Savage.
• Modern PHP New Features and Good Practices - A book about new PHP features and best practices by Josh Lockhart.
• Modernizing Legacy Applications in PHP - A book about modernizing legacy PHP applications by Paul M. Jones.
• PHP 7 Upgrade Guide - An ebook covering all of the features and changes in PHP 7 by Colin O'Dell.
• PHP Pandas - A book about learning to write PHP by Dayle Rees.
• Scaling PHP Applications - An ebook about scaling PHP applications by Steve Corona.
• Securing PHP: Core Concepts - A book about common security terms and practices for PHP by Chris Cornutt.
• Signaling PHP - A book about catching PCNTL signals in CLI scripts by Cal Evans.
• The Grumpy Programmer's Guide to Building Testable PHP Applications - A book about building testing PHP applications by Chris Hartjes.
• XML Parsing with PHP - This book covers parsing and validating XML documents, leveraging XPath expressions, and working with namespaces as well as how to create and modify XML files programmatically.

Fantastic PHP-related videos.

• Nomad PHP Lightning Talks - 10 to 15 minute Lightning Talks by PHP community members.
• PHP UK Conference - A collection of videos from the PHP UK Conference.
• Programming with Anthony - A video series by Anthony Ferrara.
• Taking PHP Seriously - A talk outlining PHP's strengths by Keith Adams of Facebook.
• Laracasts - Screencasts about Laravel, Vue JS and more.

Podcasts with a focus on PHP topics.

• Laravel Podcast - Laravel and PHP development news and discussion.
• PHP Internals News - A podcast about PHP internals.
• PHP Roundtable - The PHP Roundtable is a casual gathering of developers discussing topics that PHP nerds care about.
• PHP Town Hall - A casual PHP podcast by Ben Edmunds and Phil Sturgeon.
• Voices of the ElePHPant Interviews with the people that make the PHP community special.

PHP-related news directly to your inbox.

• PHP Weekly - A weekly newsletter about PHP.

Fantastic PHP-related magazines.

• php[architect] - A monthly magazine dedicated to PHP.

PHP-releated reading materials.

• Composer Primer - A Composer primer.
• Composer Stability Flags - An article about Composer stability flags.
• Composer Versioning - An article about Composer versioning.
• Create Your Own PHP Framework - A series of articles on how to make your own PHP framework by Fabien Potencier.
• Don't Worry About BREACH - An article about the BREACH hack and CSRF tokens.
• On PHP 5.3, Lambda Functions and Closures - An article about lambda functions and closures.
• PHP Is Much Better Than You Think - An article about the PHP language and ecosystem.
• PHP Package Checklist - A checklist for successful PHP package development.
• PHP Sucks! But I Like It! - An article about the pros and cons of PHP.
• Preventing CSRF Attacks - An article on preventing CSRF attacks.
• Seven Ways to Screw Up BCrypt - An article about correct BCrypt implementation.
• The 2018 Guide to Building Secure PHP Software - A guide to building secure PHP software.
• Use Env - An article about using the unix environment helper.

Reading materials related to the PHP internals or performance.

• PHP RFCs - The home of PHP RFCs (Request for Comments).
• Externals - PHP internal discussions.
• PHP RFC Watch - Watch the latest PHP RFCs.
• Disproving the Single Quotes Myth - An article about performance of single and double quoted strings.
• How Big Are PHP Arrays (And Values) Really? - An article about array internals.
• How Foreach Works - A detailed StackOverflow answer about foreach.
• How Long is a Piece of String - An article about string internals.
• PHP Evaluation Order - An article about evaluation order in PHP.
• PHP Internals Book - An online book about PHP internals, written by three core developers.
• Print vs Echo, Which One is Faster? - An article about print and echo performance.
• The PHP Ternary Operator. Fast or Not? - An article ternary performance.
• Understanding OpCodes - An article about opcodes.
• When Does Foreach Copy? - An article about the internals of foreach.
• Why Objects (Usually) Use Less Memory Than Arrays - An article about object and array internals.
• You're Being Lied To - An article about internal ZVALs.
• Collecting Garbage: 1 2 3 - A series about the PHP garbage collection internals.
• PHP Source Code for Developers: 1 2 3 4 - A series about the PHP source code.