Awesome PHP

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

Contributing

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

Table of Contents

• Awesome PHP
  • Dependency Management
  • Dependency Management Extras
  • Frameworks
  • Framework Extras
  • Components
  • Micro Frameworks
  • Micro Framework Extras
  • Routers
  • Templating
  • Static Site Generators
  • HTTP
  • Middlewares
  • URL
  • Email
  • Files
  • Streams
  • Dependency Injection
  • Imagery
  • Testing
  • Continuous Integration
  • Documentation
  • Security
  • Passwords
  • Code 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
  • Third Party APIs
  • Extensions
  • Miscellaneous
• Software
  • PHP Installation
  • Development Environment
  • Virtual Machines
  • Integrated Development Environment
  • Web Applications
  • Infrastructure
• Resources
  • PHP Websites
  • Other Websites
  • PHP Books
  • PHP Videos
  • PHP Podcasts
  • PHP Reading
  • PHP Internals Reading
• Contributing

Dependency Management

Libraries for dependency and package management.

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

Dependency Management Extras

Extras related to dependency management.

• Composed - A library to parse your project's Composer environment at runtime.
• Composer Checker - A tool to validate Composer configurations.
• Composer Merge Plugin - A composer plugin to merge several composer.json files.
• Composition - A library to check your Composer environment at runtime.
• NameSpacer - A library to convert from underscores to namespaces.
• Patch Installer - A library to install patches using Composer.
• Prestissimo - A composer plugin which enables parallel install process.
• 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.

Frameworks

Web development frameworks.

• Aura PHP - A framework of independent components.
• CakePHP - A rapid application development framework (CP).
• Laravel 5 - Another PHP framework (L5).
• Nette - Another framework comprised of individual components.
• Phalcon - A framework implemented as a C extension.
• PPI Framework 2 - An interoperability framework.
• Symfony 3 - A framework comprised of individual components (SF3).
• Yii2 - Another PHP framework.
• Zend Framework 2 - Another framework comprised of individual components (ZF2).
• Radar - An Action-Domain-Responder implementation for PHP.
• Ice - Another simple and fast PHP framework delivered as C-extension.

Framework Extras

Extras related to web development frameworks.

• CakePHP CRUD - A Rapid Application Development (RAD) plugin for CakePHP.
• Knp RAD Bundle - A Rapid Application Development (RAD) bundle for Symfony 2.
• Symfony CMF - A Content Management Framework to create custom CMS.

Components

Standalone components from web development frameworks and development groups.

• CakePHP Plugins - A directory of CakePHP plugins.
• Hoa Project - Another package of PHP components.
• League of Extraordinary Packages - A PHP package development group.
• Symfony2 Components - The components that make Symfony 2.
• Zend Framework 2 Components - The components that make Zend Framework.

Micro Frameworks

Micro frameworks and routers.

• Bullet PHP - A micro framework for building REST APIs.
• Lumen - A micro-framework by Laravel.
• Proton - A StackPHP compatible micro framework.
• Silex - A micro framework built around Symfony2 components.
• Slim - Another simple micro framework.

Micro Framework Extras

Extras related to micro frameworks and routers.

• Silex Skeleton - A project skeleton for Silex.
• Silex Web Profiler - A web debug toolbar for Silex.
• Slim Skeleton - A skeleton for Slim.
• Slim View - A collection of custom views for Slim.

Routers

Libraries for handling application routing.

• 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.

Templating

Libraries and tools for templating and lexing.

• Foil - Another native PHP templating library.
• Lex - A lightweight template parser.
• MtHaml - A PHP implementation of the HAML template language.
• Mustache - A PHP implementation of the Mustache template language.
• Phly Mustache - Another 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.
• Tale Jade - A PHP implementation of the Jade template language.

Static Site Generators

Tools for pre-processing content to generate web pages.

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

HTTP

Libraries for working with HTTP.

• Buzz - Another HTTP client.
• Guzzle - A comprehensive HTTP client.
• HTTPFul - A chainable HTTP client.
• 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.
• zend-diactoros - PSR-7 HTTP Message implementation.

Scraping

Libraries for scraping websites.

• Embed - An information extractor from any web service or page.
• Goutte - A simple web scraper.
• PHP Spider - A configurable and extensible PHP web spider.

Middlewares

Libraries for building application using middlewares.

• Expressive - PSR-7 Middleware framework from Zend.
• PSR7-Middlewares - Inspiring collection of handy middlewares.
• Relay - A PHP 5.5 PSR-7 middleware dispatcher.
• Stack - A library of stackable middleware for Silex/Symfony.
• zend-stratigility - Middleware for PHP built on top of PSR-7.

URL

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.

Email

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.
• Stampie - A library for email services such as SendGrid, PostMark, MailGun and Mandrill.
• SwiftMailer - A mailer solution.

Files

Libraries for file manipulation and MIME type detection.

• Apache MIME Types - A library that parses Apache MIME types.
• Canal - A library to determine internet media types.
• CSV - A CSV data manipulation library.
• Ferret - A MIME detection library.
• Flysystem - Another filesystem abstraction layer.
• Gaufrette - A filesystem abstraction layer.
• Hoa Mime - Another MIME detection library.
• Lurker - A resource tracking library.
• PHP FFmpeg - A wrapper for the FFmpeg video library.
• UnifiedArchive - A unified reader and writer of compressed archives.

Streams

Libraries for working with streams.

• Streamer - A simple object-orientated stream wrapper library.

Dependency Injection

Libraries that implement the dependency injection design pattern.

• Acclimate - A common interface to dependency injection containers and service locators.
• Auryn - A recursive dependency injector.
• Container - Another flexible 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 (SF2).

Imagery

Libraries for manipulating images.

• Color Extractor - A library for extracting colours from images.
• GIF Creator - A library to create GIF animations from multiple images.
• GIF Frame Extractor - A library to extract GIF animation frame information.
• Glide - An on-demand image manipulation library.
• Image Hash - A library for generating perceptual image hashes.
• Image Optimizer - A library for optimizing images.
• Image With Text - A library for embedding text into images.
• Imagine - An image manipulation library.
• Intervention Image - Another image manipulation library.
• PHP Image Workshop - Another image manipulation library.

Testing

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.
• DBUnit - A database testing library for PHPUnit.
• Faker - A fake data generator library.
• HTTP Mock - A library for mocking HTTP requests in unit tests.
• 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.
• 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.
• Samsui - Another fake data generator library.
• VFS Stream - A virtual filesystem stream wrapper for testing.
• VFS - Another virtual filesystem for testing.

Continuous Integration

Libraries and applications for continuous integration.

• CircleCI - A continuous integration platform.
• GitlabCi - Let GitLab CI test, build, deploy your code. TravisCi like.
• Jenkins - A continous 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.
• Sismo - A continuous testing server library.
• Travis CI - A continuous integration platform.
• Wercker - A continuous integration platform

Documentation

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).
• Sami - An API documentation generator.

Security

Libraries for generating secure random numbers, encrypting data and scanning 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.
• PHP Encryption - Secure PHP Encryption Library.
• PHP IDS - A structured PHP security layer.
• PHP SSH - An experimental object orientated SSH wrapper library.
• PHPSecLib - A pure PHP secure communications library.
• RandomLib - A library for generating random numbers and strings.
• SecurityMultiTool - A PHP security library.
• SensioLabs Security Check - A web tool to check your Composer dependencies for security advisories.
• TCrypto - A simple encrypted key-value storage library.
• True Random - A library that generates random numbers using www.random.org.
• VAddy - A continuous security testing platform for web applications.
• Zed - An integrated penetration testing tool for web applications.

Passwords

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.

Code Analysis

Libraries and tools for analysing, parsing and manipulating codebases.

• Athletic - An annotation based benchmark framework.
• Better Reflection - AST-based reflection library that allows analysis and manipulation of code
• Code Climate - An automated code review.
• Dissect - A set of tools for lexical and syntactical analysis.
• Exakat - A static analysis engine for PHP.
• GrumPHP - A composer plugin to defend code quality.
• Mondrian - A code analysis tool using Graph Theory.
• PHP Analyser - A library for analysing PHP code to find bugs and errors.
• PHP Code Sniffer - A library that detects PHP, CSS and JS coding standard violations.
• PHP CS Fixer - A coding standards fixer library.
• PHP Manipulator - A library for analysing and modifying PHP Source Code.
• PHP Mess Detector - A library that scans code for bugs, sub-optimal code, unused parameters and more.
• PHP Metrics - A static metric library.
• PHP Migration - A static analyzer for PHP version migration.
• PHP Parser - A PHP parser written in PHP.
• PHP Refactoring Browser - A command line utility for refactoring PHP code.
• PHP Semantic Versioning Checker - A command line utility that compares two source sets and determines the appropriate semantic versioning to apply.
• phan - A static analyzer based on PHP 7+ and the php-ast extension.
• PHPCheckstyle - A tool to help adhere to certain coding conventions.
• PHPCPD - A library that detects copied and pasted code.
• PhpDependencyAnalysis - A tool to create customisable dependency graphs.
• 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).
• PHPPHP - A PHP VM implementation in PHP.
• PHPSandbox - A PHP sandbox environment.
• Qafoo Quality Analyzer - A tool to visualize metrics and source code.
• Scrutinizer - A web tool to scrutinise PHP code.
• UBench - A simple micro benchmark library.

Architectural

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

• Compose - A function composition library.
• Design Patterns PHP - A repository of software patterns implemented in PHP.
• Finite - A simple PHP finite state machine.
• Functional PHP - A functional programming library.
• Galapagos - Evolutionary language transformation.
• Iter - A library that provides iteration primitives using generators.
• Monad PHP - A simple Monad library.
• Patchwork - A library for redefining userland functions.
• PHP Option - An option type library.
• Pipeline - A pipeline pattern implementation.
• Ruler - A simple stateless production rules engine.
• RulerZ - A powerful rule engine and implementation of the Specification pattern.

Debugging and Profiling

Libraries and tools for debugging 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.
• PHP Console - A web debugging console.
• PHP Debug Bar - A debugging toolbar.
• PHPBench - A benchmarking Framework.
• PHPDBG - An interactive PHP debugger.
• Tideways.io - Monitoring and profiling tool
• Tracy - A simple error detection, logging and time measuring 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.

Build Tools

Project build and automation tools.

• Bob - A simple project automation tool.
• Box - A utility to build PHAR files.
• Construct - A PHP project/micro-package generator.
• Phake - A rake PHP clone library.
• Phing - A PHP project build system inspired by Apache Ant.

Task Runners

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.

Navigation

Tools for building navigation structures.

• Cartographer - A sitemap generation library.
• KnpMenu - A menu library.

Asset Management

Tools for managing, compressing and minifying website assets.

• Assetic - An asset manager pipeline library.
• JShrink - A JavaScript minifier library.
• Munee - An asset optimiser library.
• Pipe - Another asset manager pipeline library.
• Puli - A library for determining assets absolute paths.
• BowerPHP - A PHP implementation of Bower. A package manager for the web

Geolocation

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.

Date and Time

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.
• ExpressiveDate - Another DateTime API extension.
• Moment.php - Moment.js inspired PHP DateTime handler with i18n support.

Event

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.
• Cake Event - An event dispatcher library (CP).
• 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.
• Icicle - An asynchronous library with coroutines, non-blocking I/O, and multithreading.
• Prooph Event Store - An event source component to persist event messages
• Ratchet - A web socket library.
• React - An event driven non-blocking I/O library.
• Rx.PHP - A reactive extension library.
• Workerman - An event driven non-blocking I/O library.

Logging

Libraries for generating and working with log files.

• Analog - A closure-based micro logging package.
• KLogger - An easy-to-use PSR-3 compliant logging class.
• Monolog - A comprehensive logger.

E-commerce

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

• Money - A PHP implementation of Fowler's money pattern.
• 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.

PDF

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.

Office

Libraries for working with office suite documents.

• ExcelAnt - A library for manipulating Microsoft Excel 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)

Database

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

• Baum - A nested set implementation for Eloquent.
• Cake ORM - Object-Relational Mapper, implemented using the DataMapper pattern (CP).
• Doctrine Extensions - A collection of Doctrine behavioural extensions.
• Doctrine - A comprehensive DBAL and ORM.
• Eloquent - A simple ORM (L5).
• LazyRecord - A fast ORM designed for simplicity, extendability and performance.
• Pomm - An Object Model Manager for PostgreSQL.
• Propel - A fast ORM, migration library and query builder.
• ProxyManager - A set of utilities to generate proxy objects for data mappers.
• RedBean - A lightweight, configuration-less ORM.
• Spot2 - A MySQL datamapper ORM.

Migrations

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.

NoSQL

Libraries for working with "NoSQL" backends.

• Monga - A MongoDB abstraction library.
• MongoQB - A MongoDB query builder library.
• PHPMongo - A MongoDB ORM.
• Predis - A feature complete Redis library.

Queue

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.

Search

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.

Command Line

Libraries related to the command line.

• 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.
• OptParse - Another command line opt parser.
• Pecan - An event-driven, non-blocking shell.
• PsySH - Another PHP REPL.
• ShellWrap - A simple command line wrapper library.
• Shunt - A library for running commands in parallel on multiple remote machines.

Authentication and Authorization

Libraries for implementing user authentication and authorization.

• Hawk - A Hawk HTTP authentication library.
• HybridAuth - An open source social sign on library.
• Json Web Token - Json Tokens to authenticate and transmit information.
• Lock - A library for implementing Access Control Lists (ACL) systems.
• 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.
• TwitterSDK - A fully tested Twitter SDK.

Markup

Libraries for working with markup.

• Cebe Markdown - An fast and extensible Markdown parser.
• Ciconia - Another Markdown parser that supports Github flavoured Markdown.
• CommonMark PHP - A Markdown parser which supports the full 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.

Strings

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.
• Slugify - A library to convert strings to slugs.
• SQL Formatter - A library for formatting SQL statements.
• Stringy - A string manipulation library with multibyte support.
• Text - A text manipulation library.
• UA Parser - A library for parsing user agent strings.
• URLify - A PHP port of Django's URLify.js.
• UUID - A library for generating UUIDs.

Numbers

Libraries for working with numbers.

• 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.
• Math - A library for working with large numbers.
• Numbers PHP - A library for working with numbers.
• PHP Conversion - Another library for converting between units of measure.
• PHP Units of Measure - A library for converting between units of measure.

Filtering and Validation

Libraries for filtering and validating data.

• Cake Validation - Another validation library (CP).
• DMS Filter - An annotation filtering 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
• 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.

API

Libraries and web tools for developing APIs.

• API Platform - Expose in minutes an hypermedia REST API that embraces JSON-LD, Hydra format.
• Apigility - An API builder built with Zend Framework 2.
• 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.

Caching

Libraries for caching data.

• Alternative PHP Cache (APC) - Open opcode cache for PHP.
• 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.
• Cake Cache - A caching library (CP).
• Doctrine Cache - A caching library.
• Metaphore - Cache slam defense using a semaphore to prevent dogpile effect.
• Stash - Another library for caching.
• Zend Cache - Another caching library (ZF2).

Data Structure and Storage

Libraries that implement data structure or storage techniques.

• Ardent - A library of data structures.
• Cake Collection - A simple collections library (CP).
• Collections - Collections Abstraction library for PHP.
• 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.
• Knapsack - Collection library inspired by Clojure's sequences.
• PHP Collections - A simple collections library.
• PINQ - A PHP library based on .NET's LINQ (Language Integrated Query).
• Porter - Data import abstraction framework.
• Serializer - A library for serialising and de-serialising data.
• Totem - A library to manage and create data changesets.
• YaLinqo - Yet Another LINQ to Objects for PHP.
• Zend Serializer - Another library for serialising and de-serialising data (ZF2).

Notifications

Libraries for working with notification software.

• JoliNotif - A cross-platform library for desktop notification (support for Growl, notify-send, toaster, etc)
• Nod - A notification library (e.g., Growl).
• 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.

Deployment

Libraries for project deployment.

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

Internationalisation and Localisation

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

• Aura Intl
• Cake I18n - Message translation and localization for dates and numbers (CP)

Third Party APIs

Libraries for accessing third party APIs.

• Amazon Web Service SDK - The official PHP AWS SDK library.
• Campaign Monitor - The official Campaign Monitor PHP library.
• Digital Ocean - A library to interface with the Digital Ocean API.
• Dropbox SDK - The official PHP Dropbox SDK library.
• Github - A library to interface with the Github API.
• Mailgun The official Mailgun PHP API.
• PHP Github API - Another library to interface with the Github API.
• S3 Stream Wrapper - A stream wrapper library for Amazon S3.
• Stripe - The official Stripe PHP library.
• Twilio - The official Twilio PHP REST API.
• Twitter OAuth - A library to interface with Twitter's OAuth workflow.
• Twitter REST - A library to interact with Twitter's REST API.

Extensions

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.

Miscellaneous

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

• Annotations - An annotations library (part of Doctrine).
• Cake Utility - Utility classes such as Inflector, String, Hash, Security and Xml (CP).
• 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.
• Flux - A regular expression building library.
• 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.
• Jumper - A remote service executor library.
• LadyBug - A dumper library.
• Lambda PHP - A Lambda calculus interpreter in PHP.
• LiteCQRS - A CQRS (Command Query Responsibility Separation) library.
• Metrics - A simple metrics API library.
• noCAPTCHA - Helper for Google's noCAPTCHA (reCAPTCHA).
• Nmap - A PHP wrapper around Nmap.
• Opengraph - An opengraph library.
• Pagerfanta - A pagination library.
• PHP Expression - A PHP expression language.
• PHP PassBook - A PHP library for iOS PassBook.
• PHP-GPIO - A library for playing with the Raspberry PI's GPIO pins.
• 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.
• Secure Headers - A package that add security related headers to HTTP response.
• Slimdump - An easy dumper tool for MySQL.
• Spork - A process forking library.
• Sslurp - A library that makes dealing with SSL suck less.
• SuperClosure - A library that allows Closures to be serialized.
• Symfony VarDumper - A variable dumper component (SF2).
• Underscore - A PHP port of the Underscore JS library.
• Whoops - A pretty error handling library.

Software

Software for creating a development environment.

PHP Installation

Tools to help install and manage PHP on your computer.

• HomeBrew PHP - A PHP tap for HomeBrew.
• HomeBrew - A package manager for OSX.
• PHP Brew - A PHP version manager and installer.
• PHP Build - Another PHP version installer.
• PHP Env - Another PHP version manager.
• PHP OSX - A PHP installer for OSX.
• PHP Switch - Another version manager.
• VirtPHP - A tool for creating and managing isolated PHP environments.

Development Environment

Software and tools for creating a sandboxed development environment.

• Ansible - A radically simple orchestration framework.
• Phansible - A web tool for building PHP development virtual machines with Ansible.
• Protobox - Another web tool for building PHP development virtual machines.
• PuPHPet - A web tool for building PHP development virtual machines.
• Puppet - A server automation framework and application.
• Vagrant - A portable development environment utility.
• Docker - A containerization platform.

Virtual Machines

Alternative PHP virtual machines.

• Hack - A programming language for HHVM that interoperates seamlessly with PHP.
• HHVM - A Virtual Machine, Runtime and JIT for PHP by Facebook.
• HippyVM - Another PHP virtual machine.

Integrated Development Environment

Integrated Development Environments with support for PHP.

• Eclipse for PHP Developers - A PHP IDE based on the Eclipse platform.
• Netbeans - An IDE with support for PHP and HTML5.
• PhpStorm - A commercial PHP IDE.

Web Applications

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.
• phpBeanstalkdAdmin - Monitoring and administration interface for Beanstalkd.
• phpRedisAdmin - A simple web interface to manage Redis databases.
• phpPgAdmin - A web-based administration tool for PostgreSQL.
• phpMyAdmin - A web interface for MySQL/MariaDB.
• Adminer - Database management in a single PHP file.
• Grav - A modern flat-file CMS.

Infrastructure

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.

Resources

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

PHP Websites

Useful PHP-related websites.

• Nomad PHP - A online PHP learning resource.
• PHP Best Practices - A PHP best practice guide.
• PHP FIG - The PHP Framework Interoperability Group.
• PHP Mentoring - Peer to peer PHP mentorship organization.
• 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.
• PHPTrends - An overview of fastest growing PHP libraries.
• Securing PHP - A newsletter about PHP security and library recommendations.
• Seven PHP - A website that interviews members of the PHP community.

Other Websites

Useful websites related to web development.

• Atlassian Git Tutorials - A series of Git tutorials.
• Hg Init - A series of Mercurial tutorials.
• Semantic Versioning - A website explaining semantic versioning.
• Servers for Hackers - A newsletter about server management.
• The Open Web Application Security Project (OWASP) - An open software security community.
• WebSec IO - A web security community resource.

PHP Books

Fantastic PHP-related books.

• 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.
• Modernising Legacy Applications in PHP - A book about modernising 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.
• Domain-Driven Design in PHP - Real examples written in PHP showcasing DDD Architectural Styles.

Other Books

Books related to general computing and web development.

• Elasticsearch: The Definitive Guide - A guide to working with Elasticsearch by Clinton Gormley and Zachary Tong.
• Eloquent JavaScript - A book about JavaScript programming by Marijn Haverbeke.
• Head First Design Patterns - A book that expains software design patterns.
• Pro Git - A book about Git by Scott Chacon and Ben Straub.
• The Linux Command Line - A book about the Linux command line by William Shotts.
• The Tangled Web — Securing Web Applications - A book about securing web applications by Michal Zalewski.
• Understanding Computation - A book about computation theory by Tom Stuart.
• Vagrant Cookbook - A book about creating Vagrant environments by Erika Heidi.

PHP Videos

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.

PHP Podcasts

Podcasts with a main focus on PHP topics

• 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 Roundtable - The PHP Roundtable is a casual gathering of developers discussing topics that PHP nerds care about.

PHP Reading

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.
• Use Env - An article about using the unix environment helper.

PHP Internals Reading

Reading materials related to the PHP internals or performance.

• 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.
• PHP RFCs - The home of PHP RFCs (Request for Comments).
• 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.

PHP Magazines

Fantastic PHP-related magazines.

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