diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d36602d..a9884a0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,16 +1,16 @@
 # Contribution Guidelines
-Unfortunately, not every library, tool or framework can be considered for inclusion. The aim of Awesome PHP is to be a concise list of noteworthy and interesting software written in modern PHP. Therefore, suggested software should: 
+Unfortunately, not every library, tool or framework can be considered for inclusion. The aim of Awesome PHP is to be a concise list of noteworthy and interesting software written in modern PHP. Therefore, suggested software should:
 
 1. Be widely recommended regardless of personal opinion
 2. Well known or discussed within the PHP community
 3. Be unique in its approach or function
-4. Fill a niche gap in the market  
+4. Fill a niche gap in the market
 
 Self-promotion is frowned upon, so please consider seriously whether your project meets the criteria before opening a pull request, otherwise it may be closed without being reviewed.
 
 Also, please ensure your pull request adheres to the following guidelines:
 
-* Software that is PHP 5.5+, Composer-installable, PSR compliant, semantically versioned, united tested and well documented in English is preferred.
+* Software that is PHP 7.0+, Composer-installable, PSR compliant, semantically versioned, unit tested, actively maintained and well documented in English is preferred.
 * Please search previous suggestions before making a new one, as yours may be a duplicate.
 * Enter a meaningful pull request description.
 * Please make an individual commit for each suggestion in a separate pull request.
@@ -18,7 +18,7 @@ Also, please ensure your pull request adheres to the following guidelines:
 * Use the following format for libraries: \[LIBRARY\]\(LINK\) - DESCRIPTION.
 * Prefix duplicate library names with their vendor or namespace followed by a space: Foo\Bar would be Foo Bar.
 * New categories, or improvements to the existing categorisation, are always welcome.
-* Please keep descriptions short, simple and unbiased. No buzzwords or marketing jargon. 
+* Please keep descriptions short, simple and unbiased. No buzzwords or marketing jargon.
 * End all descriptions with a full stop/period.
 * Check your spelling and grammar.
 * Make sure your text editor is set to remove trailing whitespace.
diff --git a/README.md b/README.md
index 784e2f0..f275ac8 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 A curated list of amazingly awesome PHP libraries, resources and shiny things.
 
-## Contributing
-Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONTRIBUTING.md) and [CODE-OF-CONDUCT](https://github.com/ziadoz/awesome-php/blob/master/CODE-OF-CONDUCT.md) for details.
+## Contributing and Collaborating
+Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONTRIBUTING.md), [CODE-OF-CONDUCT](https://github.com/ziadoz/awesome-php/blob/master/CODE-OF-CONDUCT.md) and [COLLABORATING](https://github.com/ziadoz/awesome-php/blob/master/COLLABORATING.md) for details.
 
 ## Table of Contents
 - [Awesome PHP](#awesome-php)
@@ -32,6 +32,8 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
     - [Security](#security)
     - [Passwords](#passwords)
     - [Code Analysis](#code-analysis)
+    - [Code Quality](#code-quality)
+    - [Static Analysis](#static-analysis)
     - [Architectural](#architectural)
     - [Debugging and Profiling](#debugging-and-profiling)
     - [Build Tools](#build-tools)
@@ -69,7 +71,7 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
     - [PHP Installation](#php-installation)
     - [Development Environment](#development-environment)
     - [Virtual Machines](#virtual-machines)
-    - [Integrated Development Environment](#integrated-development-environment)
+    - [Text Editors and IDEs](#text-editors-and-ides)
     - [Web Applications](#web-applications)
     - [Infrastructure](#infrastructure)
 - [Resources](#resources)
@@ -82,17 +84,16 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
     - [PHP Internals Reading](#php-internals-reading)
 - [Contributing](#contributing)
 
-## Composer Repositories
+### Composer Repositories
 *Composer Repositories.*
 
 * [Firegento](http://packages.firegento.com/) - Magento Module Composer Repository.
 * [Packagist](https://packagist.org/) - The PHP Package Repository.
-* [PaketHub](https://pakethub.com/) - All-in-One PHP Package Repository.
 * [Private Packagist](https://packagist.com/) - Composer package archive as a service for PHP.
 * [WordPress Packagist](https://wpackagist.org/) - Manage your plugins with Composer.
 * [Zend Framework Packages](https://packages.zendframework.com/) - Zend Framework Composer Repository.
 
-## Dependency Management
+### Dependency Management
 *Libraries for dependency and package management.*
 
 * [Composer Installers](https://github.com/composer/installers) - A  multi framework Composer library installer.
@@ -100,21 +101,17 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Melody](http://melody.sensiolabs.org/) - A tool to build one file Composer scripts.
 * [Pickle](https://github.com/FriendsOfPHP/pickle) - A PHP extension installer.
 
-## Dependency Management Extras
+### Dependency Management Extras
 *Extras related to dependency management.*
 
 * [Composed](https://github.com/joshdifabio/composed) - A library to parse your project's Composer environment at runtime.
-* [Composer Checker](https://github.com/silpion/composer-checker) - A tool to validate Composer configurations.
 * [Composer Merge Plugin](https://github.com/wikimedia/composer-merge-plugin) - A composer plugin to merge several composer.json files.
-* [Composition](https://github.com/bamarni/composition) - A library to check your Composer environment at runtime.
-* [NameSpacer](https://github.com/ralphschindler/Namespacer) - A library to convert from underscores to namespaces.
-* [Patch Installer](https://github.com/goatherd/patch-installer) - A library to install patches using Composer.
 * [Prestissimo](https://github.com/hirak/prestissimo) - A composer plugin which enables parallel install process.
 * [Satis](https://github.com/composer/satis) - A static Composer repository generator.
 * [tooly](https://github.com/tommy-muehle/tooly-composer-script) - A library to manage PHAR files in project using Composer.
 * [Toran Proxy](https://toranproxy.com) - A static Composer repository and proxy.
 
-## Frameworks
+### Frameworks
 *Web development frameworks.*
 
 * [Aura Framework](http://auraphp.com/framework/) - A framework built from independent components.
@@ -122,20 +119,20 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Laravel 5](https://laravel.com/) - Another PHP framework (L5).
 * [Nette](https://nette.org) - Another framework comprised of individual components.
 * [Phalcon](https://phalconphp.com/en/) - A framework implemented as a C extension.
-* [PPI Framework 2](http://www.ppi.io) - An interoperability framework.
+* [PPI Framework 2](https://github.com/ppi) - An interoperability framework.
 * [Symfony](https://symfony.com/) - A framework comprised of individual components (SF).
 * [Yii2](https://github.com/yiisoft/yii2/) - Another PHP framework.
 * [Zend Framework 2](https://framework.zend.com) - Another framework comprised of individual components (ZF2).
 * [Ice](https://www.iceframework.org/) - Another simple and fast PHP framework delivered as C-extension.
 
-## Framework Extras
+### Framework Extras
 *Extras related to web development frameworks.*
 
 * [CakePHP CRUD](https://github.com/friendsofcake/crud) - A Rapid Application Development (RAD) plugin for CakePHP.
 * [Knp RAD Components](http://rad.knplabs.com/) - A set of Rapid Application Development (RAD) components for Symfony.
 * [Symfony CMF](https://github.com/symfony-cmf/symfony-cmf) - A Content Management Framework to create custom CMS.
 
-## Components
+### Components
 *Standalone components from web development frameworks and development groups.*
 
 * [Aura](http://auraphp.com/) - Independent components, fully decoupled from each other and from any framework.
@@ -145,25 +142,24 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Symfony Components](http://symfony.com/doc/master/components/index.html) - The components that make Symfony.
 * [Zend Framework 2 Components](https://docs.zendframework.com/) - The components that make Zend Framework.
 
-## Micro Frameworks
+### Micro Frameworks
 *Micro frameworks and routers.*
 
 * [Bullet PHP](http://bulletphp.com/) - A micro framework for building REST APIs.
 * [Lumen](https://lumen.laravel.com) - A micro-framework by Laravel.
-* [Proton](https://github.com/alexbilbie/Proton) - A StackPHP compatible micro framework.
 * [Radar](https://github.com/radarphp/Radar.Adr) - An Action-Domain-Responder implementation for PHP.
-* [Silex](https://silex.sensiolabs.org/) - A micro framework built around Symfony components.
 * [Slim](https://www.slimframework.com/) - Another simple micro framework.
 
-## Micro Framework Extras
+### Micro Framework Extras
 *Extras related to micro frameworks and routers.*
 
 * [Silex Skeleton](https://github.com/silexphp/Silex-Skeleton) - A project skeleton for Silex.
 * [Silex Web Profiler](https://github.com/silexphp/Silex-WebProfiler) - A web debug toolbar for Silex.
 * [Slim Skeleton](https://github.com/slimphp/Slim-Skeleton) - A skeleton for Slim.
-* [Slim View](https://github.com/slimphp/Slim-Views) - A collection of custom views for Slim.
+* [Slim Twig View](https://github.com/slimphp/Slim-Views) - Integrate Twig into Slim.
+* [Slim PHP View](https://github.com/slimphp/PHP-View) - A simple PHP renderer for Slim.
 
-## Routers
+### Routers
 *Libraries for handling application routing.*
 
 * [Aura.Router](https://github.com/auraphp/Aura.Router) - A full-featured routing library.
@@ -172,48 +168,46 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Pux](https://github.com/c9s/Pux) - Another fast routing library.
 * [Route](https://github.com/thephpleague/route) - A routing library built on top of Fast Route.
 
-## Templating
+### Templating
 *Libraries and tools for templating and lexing.*
 
 * [Aura.View](https://github.com/auraphp/Aura.View) - Provides TemplateView and TwoStepView using PHP as the tempting language, with support for partials, sections, and helpers.
 * [Foil](https://github.com/FoilPHP/Foil) - Another native PHP templating library.
-* [Lex](https://github.com/pyrocms/lex) - A lightweight template parser.
 * [MtHaml](https://github.com/arnaud-lb/MtHaml) - A PHP implementation of the HAML template language.
 * [Mustache](https://github.com/bobthecow/mustache.php) - A PHP implementation of the Mustache template language.
-* [Phly Mustache](https://github.com/phly/phly_mustache) - Another PHP implementation of the Mustache template language.
 * [PHPTAL](http://phptal.org/) - A PHP implementation of the [TAL](https://en.wikipedia.org/wiki/Template_Attribute_Language) templating language.
 * [Plates](http://platesphp.com/) - A native PHP templating library.
-* [Smarty](http://www.smarty.net/) - A template engine to complement PHP.
-* [Twig](https://twig.sensiolabs.org/) - A comprehensive templating language.
+* [Smarty](https://www.smarty.net/) - A template engine to complement PHP.
+* [Twig](https://twig.symfony.com/) - A comprehensive templating language.
 * [Tale Jade](https://github.com/Talesoft/tale-jade) - A PHP implementation of the Jade template language.
 
-## Static Site Generators
+### Static Site Generators
 *Tools for pre-processing content to generate web pages.*
 
 * [Couscous](http://couscous.io) - Couscous turns Markdown documentation into beautiful websites. It's GitHub Pages on steroids.
-* [Phrozn](https://github.com/Pawka/phrozn) - Another tool that converts Textile, Markdown and Twig into HTML.
 * [Sculpin](https://sculpin.io) - A tool that converts Markdown and Twig into static HTML.
 * [Spress](http://spress.yosymfony.com) - An extensible tool that converts Markdown and Twig into HTML.
 
-## HTTP
+### HTTP
 *Libraries for working with HTTP.*
 
 * [Buzz](https://github.com/kriswallsmith/Buzz) - Another HTTP client.
 * [Guzzle]( https://github.com/guzzle/guzzle) - A comprehensive HTTP client.
 * [HTTPFul](https://github.com/nategood/httpful) - A chainable HTTP client.
+* [HTTPlug](http://httplug.io) - An HTTP client abstraction without binding to a specific implementation.
 * [PHP VCR](http://php-vcr.github.io/) - A library for recording and replaying HTTP requests.
 * [Requests](https://github.com/rmccue/Requests) - A simple HTTP library.
 * [Retrofit](https://github.com/tebru/retrofit-php) - A library to ease creation of REST API clients.
 * [zend-diactoros](https://github.com/zendframework/zend-diactoros) - PSR-7 HTTP Message implementation.
 
-## Scraping
+### Scraping
 *Libraries for scraping websites.*
 
 * [Embed](https://github.com/oscarotero/Embed) - An information extractor from any web service or page.
 * [Goutte](https://github.com/FriendsOfPHP/Goutte) - A simple web scraper.
 * [PHP Spider](https://github.com/mvdbos/php-spider) - A configurable and extensible PHP web spider.
 
-## Middlewares
+### Middlewares
 *Libraries for building application using middlewares.*
 
 * [Expressive](https://zendframework.github.io/zend-expressive/) - PSR-7 Middleware framework from Zend.
@@ -222,15 +216,15 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Stack](https://github.com/stackphp) - A library of stackable middleware for Silex/Symfony.
 * [zend-stratigility](https://github.com/zendframework/zend-stratigility) - Middleware for PHP built on top of PSR-7.
 
-## URL
+### URL
 *Libraries for parsing URLs.*
 
 * [PHP Domain Parser](https://github.com/jeremykendall/php-domain-parser) - A domain suffix parser library.
 * [Purl](https://github.com/jwage/purl) - A URL manipulation library.
-* [sabre/uri](https://github.com/fruux/sabre-uri) - A functional URI manipulation library.
+* [sabre/uri](https://github.com/sabre-io/uri) - A functional URI manipulation library.
 * [Uri](https://github.com/thephpleague/uri) - Another URL manipulation library.
 
-## Email
+### Email
 *Libraries for sending and parsing email.*
 
 * [CssToInlineStyles](https://github.com/tijsverkoyen/CssToInlineStyles) - A library to inline CSS in email templates.
@@ -240,28 +234,24 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Mautic](https://github.com/mautic/mautic) - Email marketing automation
 * [PHPMailer](https://github.com/PHPMailer/PHPMailer) - Another mailer solution.
 * [Stampie](https://github.com/Stampie/Stampie) - A library for email services such as [SendGrid](https://sendgrid.com/), [PostMark](https://postmarkapp.com), [MailGun](https://www.mailgun.com/) and [Mandrill](http://www.mandrill.com).
-* [SwiftMailer](http://swiftmailer.org/) - A mailer solution.
+* [SwiftMailer](https://swiftmailer.symfony.com) - A mailer solution.
 
-## Files
+### Files
 *Libraries for file manipulation and MIME type detection.*
 
-* [Apache MIME Types](https://github.com/dflydev/dflydev-apache-mime-types) - A library that parses Apache MIME types.
-* [Canal](https://github.com/dflydev/dflydev-canal) - A library to determine internet media types.
 * [CSV](https://github.com/thephpleague/csv) - A CSV data manipulation library.
-* [Ferret](https://github.com/versionable/Ferret) - A MIME detection library.
 * [Flysystem](https://github.com/thephpleague/Flysystem) - Another filesystem abstraction layer.
 * [Gaufrette](https://github.com/KnpLabs/Gaufrette) - A filesystem abstraction layer.
 * [Hoa Mime](https://github.com/hoaproject/Mime) - Another MIME detection library.
-* [Lurker](https://github.com/henrikbjorn/Lurker) - A resource tracking library.
 * [PHP FFmpeg](https://github.com/PHP-FFmpeg/PHP-FFmpeg/) - A wrapper for the [FFmpeg](http://www.ffmpeg.org/) video library.
 * [UnifiedArchive](https://github.com/wapmorgan/UnifiedArchive) - A unified reader and writer of compressed archives.
 
-## Streams
+### Streams
 *Libraries for working with streams.*
 
 * [Streamer](https://github.com/fzaninotto/Streamer) - A simple object-orientated stream wrapper library.
 
-## Dependency Injection
+### Dependency Injection
 *Libraries that implement the dependency injection design pattern.*
 
 * [Aura.Di](https://github.com/auraphp/Aura.Di) - A serializable dependency injection container with constructor and setter injection, interface and trait awareness, configuration inheritance, and much more.
@@ -270,24 +260,21 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Container](https://github.com/thephpleague/container) - Another flexible dependency injection container.
 * [Disco](https://github.com/bitExpert/disco) - A PSR-11 compatible, annotation-based dependency injection container.
 * [PHP-DI](http://php-di.org/) - A dependency injection container that supports autowiring.
-* [Pimple](https://pimple.sensiolabs.org/) - A tiny dependency injection container.
+* [Pimple](https://pimple.symfony.com/) - A tiny dependency injection container.
 * [Symfony DI](https://github.com/symfony/dependency-injection) - A dependency injection container component (SF).
 
-## Imagery
+### Imagery
 *Libraries for manipulating images.*
 
 * [Color Extractor](https://github.com/thephpleague/color-extractor) - A library for extracting colours from images.
-* [GIF Creator](https://github.com/Sybio/GifCreator) - A library to create GIF animations from multiple images.
-* [GIF Frame Extractor](https://github.com/Sybio/GifFrameExtractor) - A library to extract GIF animation frame information.
 * [Glide](https://github.com/thephpleague/glide) - An on-demand image manipulation library.
 * [Image Hash](https://github.com/jenssegers/imagehash) - A library for generating perceptual image hashes.
 * [Image Optimizer](https://github.com/psliwa/image-optimizer) - A library for optimizing images.
-* [Image With Text](https://github.com/nmcteam/image-with-text) - A library for embedding text into images.
 * [Imagine](http://imagine.readthedocs.io/en/latest/index.html) - An image manipulation library.
 * [Intervention Image](https://github.com/Intervention/image) - Another image manipulation library.
 * [PHP Image Workshop](https://github.com/Sybio/ImageWorkshop) - Another image manipulation library.
 
-## Testing
+### Testing
 *Libraries for testing codebases and generating test data.*
 
 * [Alice](https://github.com/nelmio/alice) - An expressive fixture generation library.
@@ -301,7 +288,7 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Kahlan](https://github.com/kahlan/kahlan) - Full stack Unit/BDD testing framework with built-in stub, mock and code-coverage support.
 * [Mink](http://mink.behat.org/en/latest/) - Web acceptance testing.
 * [Mockery](https://github.com/mockery/mockery) - A mock object library for testing.
-* [ParaTest](https://github.com/brianium/paratest) - A parallel testing library for PHPUnit.
+* [ParaTest](https://github.com/paratestphp/paratest) - A parallel testing library for PHPUnit.
 * [Peridot](https://github.com/peridot-php/peridot) - An event driven test framework.
 * [Phake](https://github.com/mlively/Phake) - Another mock object library for testing.
 * [Pho](https://github.com/danielstjules/pho) - Another behaviour driven development testing framework.
@@ -310,11 +297,9 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [PHPT](https://qa.php.net/write-test.php) - A test tool used by PHP itself.
 * [PHPUnit](https://github.com/sebastianbergmann/phpunit) - A unit testing framework.
 * [Prophecy](https://github.com/phpspec/prophecy) - A highly opinionated mocking framework.
-* [Samsui](https://github.com/mauris/samsui) - Another fake data generator library.
 * [VFS Stream](https://github.com/mikey179/vfsStream) - A virtual filesystem stream wrapper for testing.
-* [VFS](https://github.com/adlawson/php-vfs) - Another virtual filesystem for testing.
 
-## Continuous Integration
+### Continuous Integration
 *Libraries and applications for continuous integration.*
 
 * [CircleCI](https://circleci.com) - A continuous integration platform.
@@ -323,12 +308,11 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [JoliCi](https://github.com/jolicode/JoliCi) - A continuous integration client written in PHP and powered by Docker.
 * [PHPCI](https://www.phptesting.org/) - An open source continuous integration platform for PHP.
 * [SemaphoreCI](https://semaphoreci.com/) - A continuous integration platform for open source and private projects.
-* [Shippable](https://app.shippable.com/) - A docker based continious integration platform for open source and private projects.
-* [Sismo](https://sismo.sensiolabs.org/) - A continuous testing server library.
+* [Shippable](https://www.shippable.com/) - A Docker based continious integration platform for open source and private projects.
 * [Travis CI](https://travis-ci.org/) - A continuous integration platform.
-* [Wercker](http://www.wercker.com/) - A continuous integration platform
+* [Wercker](http://www.wercker.com/) - A continuous integration platform.
 
-## Documentation
+### Documentation
 *Libraries for generating project documentation.*
 
 * [APIGen](https://github.com/apigen/apigen) - Another API documentation generator.
@@ -337,7 +321,7 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [phpDox](http://phpdox.de/) - A documentation generator for PHP projects (that is not limited to API documentation).
 * [Sami](https://github.com/FriendsOfPHP/Sami) - An API documentation generator.
 
-## Security
+### Security
 *Libraries for generating secure random numbers, encrypting data and scanning for vulnerabilities.*
 
 * [Halite](https://paragonie.com/project/halite) - A simple library for encryption using [libsodium](https://github.com/jedisct1/libsodium).
@@ -345,18 +329,16 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [IniScan](https://github.com/psecio/iniscan) - A tool that scans PHP INI files for security.
 * [Optimus](https://github.com/jenssegers/optimus) - Id obfuscation based on Knuth's multiplicative hashing method.
 * [PHP Encryption](https://github.com/defuse/php-encryption) - Secure PHP Encryption Library.
-* [PHP IDS](https://github.com/PHPIDS/PHPIDS) - A structured PHP security layer.
 * [PHP SSH](https://github.com/Herzult/php-ssh) - An experimental object orientated SSH wrapper library.
 * [PHPSecLib](http://phpseclib.sourceforge.net/) - A pure PHP secure communications library.
 * [random_compat](https://github.com/paragonie/random_compat) - PHP 5.x support for `random_bytes()` and `random_int()`
 * [RandomLib](https://github.com/ircmaxell/RandomLib) - A library for generating random numbers and strings.
-* [SecurityMultiTool](https://github.com/padraic/SecurityMultiTool) - A PHP security library.
 * [SensioLabs Security Check](https://security.sensiolabs.org/) - A web tool to check your Composer dependencies for security advisories.
 * [TCrypto](https://github.com/timoh6/TCrypto) - A simple encrypted key-value storage library.
 * [VAddy](https://vaddy.net/) - A continuous security testing platform for web applications.
 * [Zed](https://www.owasp.org/index.php/OWASP_Zed_Attack_Proxy_Project) - An integrated penetration testing tool for web applications.
 
-## Passwords
+### Passwords
 *Libraries and tools for working with and storing passwords.*
 
 * [GenPhrase](https://github.com/timoh6/GenPhrase) - A library for generating secure random passphrases.
@@ -368,56 +350,53 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [phpass](http://www.openwall.com/phpass/) - A portable password hashing framework.
 * [Zxcvbn PHP](https://github.com/bjeavons/zxcvbn-php) - A realistic PHP password strength estimate library based on Zxcvbn JS.
 
-## Code Analysis
+### Code Analysis
 *Libraries and tools for analysing, parsing and manipulating codebases.*
 
-* [Athletic](https://github.com/polyfractal/athletic) - An annotation based benchmark framework.
 * [Better Reflection](https://github.com/Roave/BetterReflection) - AST-based reflection library that allows analysis and manipulation of code
 * [Code Climate](https://codeclimate.com) - An automated code review.
-* [Dissect](https://github.com/jakubledl/dissect) - A set of tools for lexical and syntactical analysis.
-* [Exakat](https://github.com/exakat/exakat) - A static analysis engine for PHP.
-* [GrumPHP](https://github.com/phpro/grumphp) - A composer plugin to defend code quality.
-* [Mondrian](https://github.com/Trismegiste/Mondrian) - A code analysis tool using Graph Theory.
-* [PHP Analyser](https://github.com/scrutinizer-ci/php-analyzer) - A library for analysing PHP code to find bugs and errors.
-* [PHP Code Sniffer](https://github.com/squizlabs/PHP_CodeSniffer) - A library that detects PHP, CSS and JS coding standard violations.
-* [PHP CS Fixer](https://github.com/FriendsOfPHP/PHP-CS-Fixer) - A coding standards fixer library.
-* [PHP Manipulator](https://github.com/schmittjoh/php-manipulator) - A library for analysing and modifying PHP Source Code.
-* [PHP Mess Detector](https://phpmd.org/) - A library that scans code for bugs, sub-optimal code, unused parameters and more.
-* [PHP Metrics](https://github.com/phpmetrics/PhpMetrics) - A static metric library.
-* [PHP Migration](https://github.com/monque/PHP-Migration) - A static analyzer for PHP version migration.
 * [PHP Parser](https://github.com/nikic/PHP-Parser) - A PHP parser written in PHP.
-* [PHP Refactoring Browser](https://github.com/QafooLabs/php-refactoring-browser) - A command line utility for refactoring PHP code.
 * [PHP Semantic Versioning Checker](https://github.com/tomzx/php-semver-checker) - A command line utility that compares two source sets and determines the appropriate semantic versioning to apply.
-* [phan](https://github.com/etsy/phan) - A static analyzer based on PHP 7+ and the php-ast extension.
-* [PHPCheckstyle](https://github.com/PHPCheckstyle/phpcheckstyle) - A tool to help adhere to certain coding conventions.
-* [PHPCPD](https://github.com/sebastianbergmann/phpcpd) - A library that detects copied and pasted code.
-* [PhpDependencyAnalysis](https://github.com/mamuz/PhpDependencyAnalysis) - A tool to create customisable dependency graphs.
 * [PHPLOC](https://github.com/sebastianbergmann/phploc) - A tool for quickly measuring the size of a PHP project.
 * [PHPQA](https://github.com/EdgedesignCZ/phpqa) - A tool for running QA tools (phploc, phpcpd, phpcs, pdepend, phpmd, phpmetrics).
-* [PHPPHP](https://github.com/ircmaxell/PHPPHP) - A PHP VM implementation in PHP.
-* [PHPSandbox](https://github.com/Corveda/PHPSandbox) - A PHP sandbox environment.
-* [PHPStan](https://github.com/phpstan/phpstan) - A PHP Static Analysis Tool.
 * [Qafoo Quality Analyzer](https://github.com/Qafoo/QualityAnalyzer) - A tool to visualize metrics and source code.
-* [Scrutinizer](https://scrutinizer-ci.com/) - A web tool to scrutinise PHP code.
+* [Scrutinizer](https://scrutinizer-ci.com/) - A web tool to [scrutinise PHP code](https://github.com/scrutinizer-ci/php-analyzer).
 * [UBench](https://github.com/devster/ubench) - A simple micro benchmark library.
 
-## Architectural
+### Code Quality
+*Libraries for managing code quality, formatting and linting.*
+
+* [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) - A library that detects PHP, CSS and JS coding standard violations.
+* [PHP CS Fixer](https://github.com/FriendsOfPHP/PHP-CS-Fixer) - A coding standards fixer library.
+* [PHP Mess Detector](https://phpmd.org/) - A library that scans code for bugs, sub-optimal code, unused parameters and more.
+* [PHPCheckstyle](https://github.com/PHPCheckstyle/phpcheckstyle) - A tool to help adhere to certain coding conventions.
+* [PHPCPD](https://github.com/sebastianbergmann/phpcpd) - A library that detects copied and pasted code.
+
+### Static Analysis
+*Libraries for performing static analysis of PHP code.*
+
+* [Exakat](https://github.com/exakat/exakat) - A static analysis engine for PHP.
+* [Mondrian](https://github.com/Trismegiste/Mondrian) - A code analysis tool using Graph Theory.
+* [phan](https://github.com/phan/phan) - A static analyzer based on PHP 7+ and the php-ast extension.
+* [PHPCompatibility](https://github.com/wimg/PHPCompatibility) - A PHP compatibility checker for PHP CodeSniffer.
+* [PhpDependencyAnalysis](https://github.com/mamuz/PhpDependencyAnalysis) - A tool to create customisable dependency graphs.
+* [PHP Metrics](https://github.com/phpmetrics/PhpMetrics) - A static metric library.
+* [PHP Migration](https://github.com/monque/PHP-Migration) - A static analyzer for PHP version migration.
+* [PHPStan](https://github.com/phpstan/phpstan) - A PHP Static Analysis Tool.
+* [Pslam](https://github.com/vimeo/psalm) - A static analysis tool for finding errors in PHP applications.
+
+### Architectural
 *Libraries related to design patterns, programming approaches and ways to organize code.*
 
-* [Compose](https://github.com/igorw/compose) - A function composition library.
 * [Design Patterns PHP](https://github.com/domnikl/DesignPatternsPHP) - A repository of software patterns implemented in PHP.
 * [Finite](http://yohan.giarel.li/Finite/) - A simple PHP finite state machine.
 * [Functional PHP](https://github.com/lstrojny/functional-php) - A functional programming library.
-* [Galapagos](https://github.com/endel/galapagos) - Evolutionary language transformation.
 * [Iter](https://github.com/nikic/iter) - A library that provides iteration primitives using generators.
-* [Monad PHP](https://github.com/ircmaxell/monad-php) - A simple Monad library.
 * [Patchwork](http://patchwork2.org/) - A library for redefining userland functions.
-* [PHP Option](https://github.com/schmittjoh/php-option) - An option type library.
 * [Pipeline](https://github.com/thephpleague/pipeline) - A pipeline pattern implementation.
-* [Ruler](https://github.com/bobthecow/Ruler) - A simple stateless production rules engine.
 * [RulerZ](https://github.com/K-Phoen/rulerz) - A powerful rule engine and implementation of the Specification pattern.
 
-## Debugging and Profiling
+### Debugging and Profiling
 *Libraries and tools for debugging and profiling code.*
 
 * [APM](http://pecl.php.net/package/APM) - Monitoring extension collecting errors and statistics into SQLite/MySQL/StatsD.
@@ -427,23 +406,20 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [PHP Console](https://github.com/Seldaek/php-console) - A web debugging console.
 * [PHP Debug Bar](http://phpdebugbar.com/) - A debugging toolbar.
 * [PHPBench](https://github.com/phpbench/phpbench) - A benchmarking Framework.
-* [PHPDBG](http://phpdbg.com/) - An interactive PHP debugger.
 * [Tideways.io](https://tideways.io/) - Monitoring and profiling tool
 * [Tracy](https://github.com/nette/tracy) - A simple error detection, logging and time measuring library.
 * [xDebug](https://github.com/xdebug/xdebug) - A debug and profile tool for PHP.
 * [XHProf](https://github.com/phacility/xhprof) - A profiling tool originally developed by Facebook.
 * [Z-Ray](http://www.zend.com/en/products/server/z-ray) - A debug and profile tool for Zend Server.
 
-## Build Tools
+### Build Tools
 *Project build and automation tools.*
 
-* [Bob](https://github.com/CHH/bob) - A simple project automation tool.
 * [Box](https://github.com/box-project/box2) - A utility to build PHAR files.
 * [Construct](https://github.com/jonathantorres/construct) - A PHP project/micro-package generator.
-* [Phake](https://github.com/jaz303/phake) - A rake PHP clone library.
 * [Phing](https://www.phing.info/) - A PHP project build system inspired by Apache Ant.
 
-## Task Runners
+### Task Runners
 *Libraries for automating and running tasks.*
 
 * [Bldr](http://bldr.io/) - A PHP Task runner built on Symfony components.
@@ -451,13 +427,12 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Robo](https://github.com/consolidation/Robo) - A PHP Task runner with object-orientated configurations.
 * [Task](http://taskphp.github.io/) - A pure PHP task runner inspired by Grunt and Gulp.
 
-## Navigation
+### Navigation
 *Tools for building navigation structures.*
 
-* [Cartographer](https://github.com/tackk/cartographer) - A sitemap generation library.
 * [KnpMenu](https://github.com/KnpLabs/KnpMenu) - A menu library.
 
-## Asset Management
+### Asset Management
 *Tools for managing, compressing and minifying website assets.*
 
 * [JShrink](https://github.com/tedious/JShrink) - A JavaScript minifier library.
@@ -465,7 +440,7 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Puli](https://github.com/puli/repository) - A library for determining assets absolute paths.
 * [BowerPHP](https://github.com/Bee-Lab/bowerphp) - A PHP implementation of Bower. A package manager for the web
 
-## Geolocation
+### Geolocation
 *Libraries for geocoding addresses and working with latitudes and longitudes.*
 
 * [GeoCoder](http://geocoder-php.org/) - A geocoding library.
@@ -473,17 +448,16 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [GeoTools](https://github.com/thephpleague/geotools) - A library of geo-related tools.
 * [PHPGeo](https://github.com/mjaschen/phpgeo) - A simple geo library.
 
-## Date and Time
+### Date and Time
 *Libraries for working with dates and times.*
 
 * [CalendR](http://yohan.giarel.li/CalendR/) - A calendar management library.
 * [Carbon](https://github.com/briannesbitt/Carbon) - A simple DateTime API extension.
 * [Chronos](https://github.com/cakephp/chronos) - A DateTime API extension supporting both mutable and immutable date/time.
-* [ExpressiveDate](https://github.com/jasonlewis/expressive-date) - Another DateTime API extension.
 * [Moment.php](https://github.com/fightbulc/moment.php) - Moment.js inspired PHP DateTime handler with i18n support.
 * [Yasumi](https://github.com/azuyalabs/yasumi) - An library to help you calculate the dates and names of holidays.
 
-## Event
+### Event
 *Libraries that are event-driven or implement non-blocking event loops.*
 
 * [Amp](https://github.com/amphp/amp) - An event driven non-blocking I/O library.
@@ -497,17 +471,15 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Prooph Event Store](https://github.com/prooph/event-store) - An event source component to persist event messages
 * [Ratchet](https://github.com/ratchetphp/Ratchet) - A web socket library.
 * [React](https://github.com/reactphp/react) - An event driven non-blocking I/O library.
-* [Rx.PHP](https://github.com/asm89/Rx.PHP) - A reactive extension library.
+* [RxPHP](https://github.com/ReactiveX/RxPHP) - A reactive extension library.
 * [Workerman](https://github.com/walkor/Workerman) - An event driven non-blocking I/O library.
 
-## Logging
+### Logging
 *Libraries for generating and working with log files.*
 
-* [Analog](https://github.com/jbroadway/analog) - A closure-based micro logging package.
-* [KLogger](https://github.com/katzgrau/KLogger) - An easy-to-use PSR-3 compliant logging class.
 * [Monolog](https://github.com/Seldaek/monolog) - A comprehensive logger.
 
-## E-commerce
+### E-commerce
 *Libraries and applications for taking payments and building online e-commerce stores.*
 
 * [Money](https://github.com/moneyphp/money) - A PHP implementation of Fowler's money pattern.
@@ -515,9 +487,9 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Payum](https://github.com/payum/payum) - A payment abstraction library.
 * [Shopware](https://github.com/shopware/shopware) - Highly customizable e-commerce software
 * [Swap](https://github.com/florianv/swap) - An exchange rates library.
-* [Sylius](http://sylius.org/) - An open source e-commerce solution.
+* [Sylius](https://sylius.com/) - An open source e-commerce solution.
 
-## PDF
+### PDF
 *Libraries and software for working with PDF files.*
 
 * [Dompdf](https://github.com/dompdf/dompdf) - A HTML to PDF converter.
@@ -525,19 +497,19 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Snappy](https://github.com/KnpLabs/snappy) - A PDF and image generation library.
 * [WKHTMLToPDF](https://github.com/wkhtmltopdf/wkhtmltopdf) - A tool to convert HTML to PDF.
 
-## Office
+### Office
 *Libraries for working with office suite documents.*
 
-* [ExcelAnt](https://github.com/Wisembly/ExcelAnt) - A library for manipulating Microsoft Excel documents.
 * [PHPPowerPoint](https://github.com/PHPOffice/PHPPresentation) - A library for working with Microsoft PowerPoint Presentations.
 * [PHPWord](https://github.com/PHPOffice/PHPWord) - A library for working with Microsoft Word documents.
 * [PHPSpreadsheet](https://github.com/PHPOffice/PhpSpreadsheet) - A pure PHP library for reading and writing spreadsheet files (successor of PHPExcel)
 
-## Database
+### Database
 *Libraries for interacting with databases using object-relational mapping (ORM) or datamapping techniques.*
 
+* [Atlas.Orm](https://github.com/atlasphp/Atlas.Orm) - A data mapper implementation for your persistence model in PHP.
 * [Aura.Sql](https://github.com/auraphp/Aura.Sql) - Provides an extension to the native PDO along with a profiler and connection locator.
-* [Aura.SqlQuery](https://github.com/auraphp/Aura.SqlQuery) - Independent query builders for MySQL, PostgreSQL, SQLite, and Microsoft SQL Server. Edit
+* [Aura.SqlQuery](https://github.com/auraphp/Aura.SqlQuery) - Independent query builders for MySQL, PostgreSQL, SQLite, and Microsoft SQL Server.
 * [Baum](https://github.com/etrepat/baum) - A nested set implementation for Eloquent.
 * [Cake ORM](https://github.com/cakephp/orm) - Object-Relational Mapper, implemented using the DataMapper pattern (CP).
 * [Doctrine Extensions](https://github.com/Atlantic18/DoctrineExtensions) - A collection of Doctrine behavioural extensions.
@@ -547,10 +519,10 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Pomm](https://github.com/chanmix51/Pomm) - An Object Model Manager for PostgreSQL.
 * [Propel](http://propelorm.org/) - A fast ORM, migration library and query builder.
 * [ProxyManager](https://github.com/Ocramius/ProxyManager) - A set of utilities to generate proxy objects for data mappers.
-* [RedBean](http://redbeanphp.com/index.php) - A lightweight, configuration-less ORM.
+* [RedBean](https://redbeanphp.com/index.php) - A lightweight, configuration-less ORM.
 * [Spot2](https://github.com/spotorm/spot2) - A MySQL datamapper ORM.
 
-## Migrations
+### Migrations
 Libraries to help manage database schemas and migrations.
 
 * [Doctrine Migrations](http://docs.doctrine-project.org/projects/doctrine-migrations/en/latest/toc.html) - A migration library for Doctrine.
@@ -559,15 +531,13 @@ Libraries to help manage database schemas and migrations.
 * [PHPMig](https://github.com/davedevelopment/phpmig) - Another migration management library.
 * [Ruckusing](https://github.com/ruckus/ruckusing-migrations) - Database migrations for PHP ala ActiveRecord Migrations with support for MySQL, Postgres, SQLite.
 
-## NoSQL
+### NoSQL
 *Libraries for working with "NoSQL" backends.*
 
-* [Monga](https://github.com/thephpleague/monga) - A MongoDB abstraction library.
-* [MongoQB](https://github.com/alexbilbie/MongoQB) - A MongoDB query builder library.
 * [PHPMongo](https://github.com/sokil/php-mongo) - A MongoDB ORM.
 * [Predis](https://github.com/nrk/predis) - A feature complete Redis library.
 
-## Queue
+### Queue
 *Libraries for working with event and task queues.*
 
 * [Bernard](https://github.com/bernardphp/bernard) - A multibackend abstraction library.
@@ -577,7 +547,7 @@ Libraries to help manage database schemas and migrations.
 * [Tarantool Queue](https://github.com/tarantool-php/queue) - PHP bindings for Tarantool Queue.
 * [Thumper](https://github.com/php-amqplib/Thumper) - A RabbitMQ pattern library.
 
-## Search
+### Search
 *Libraries and software for indexing and performing search queries on data.*
 
 * [Elastica](https://github.com/ruflin/Elastica) - A client library for ElasticSearch.
@@ -586,7 +556,7 @@ Libraries to help manage database schemas and migrations.
 * [Sphinx Search](https://github.com/ripaclub/sphinxsearch) - Sphinx Search library provides SphinxQL indexing and searching features
 * [SphinxQL query builder](http://foolcode.github.io/SphinxQL-Query-Builder/) - A query library for the [Sphinx](http://sphinxsearch.com/) search engine.
 
-## Command Line
+### Command Line
 *Libraries related to the command line.*
 
 * [Aura.Cli](https://github.com/auraphp/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.
@@ -600,19 +570,15 @@ Libraries to help manage database schemas and migrations.
 * [GetOpt](https://github.com/getopt-php/getopt-php) - A command line opt parser.
 * [GetOptionKit](https://github.com/c9s/GetOptionKit) - Another command line opt parser.
 * [Hoa Console](https://github.com/hoaproject/Console) - Another command line library.
-* [OptParse](https://github.com/CHH/optparse) - Another command line opt parser.
-* [Pecan](https://github.com/mcrumm/pecan) - An event-driven, non-blocking shell.
 * [PsySH](https://github.com/bobthecow/psysh) - Another PHP REPL.
 * [ShellWrap](https://github.com/MrRio/shellwrap) - A simple command line wrapper library.
 
-## Authentication and Authorization
+### Authentication and Authorization
 *Libraries for implementing user authentication and authorization.*
 
 * [Aura.Auth](https://github.com/auraphp/Aura.Auth) - Provides authentication functionality and session tracking using various adapters.
-* [Hawk](https://github.com/dflydev/dflydev-hawk) - A Hawk HTTP authentication library.
 * [SocialConnect Auth](https://github.com/socialConnect/auth) - An open source social sign (OAuth1\OAuth2\OpenID\OpenIDConnect).
 * [Json Web Token](https://github.com/lcobucci/jwt) - Json Tokens to authenticate and transmit information.
-* [Lock](https://github.com/BeatSwitch/lock) - A library for implementing Access Control Lists (ACL) systems.
 * [OAuth 1.0 Client](https://github.com/thephpleague/oauth1-client) - An OAuth 1.0 client library.
 * [OAuth 2.0 Client](https://github.com/thephpleague/oauth2-client) - An OAuth 2.0 client library.
 * [OAuth2 Server](http://bshaffer.github.io/oauth2-server-php-docs/) - Another OAuth2 server implementation.
@@ -622,13 +588,11 @@ Libraries to help manage database schemas and migrations.
 * [Sentinel Social](https://cartalyst.com/manual/sentinel-social/2.0) - A library for social network authentication.
 * [Sentinel](https://cartalyst.com/manual/sentinel/2.0) - A framework agnostic authentication & authorisation library.
 * [TwitterOAuth](https://github.com/abraham/twitteroauth) - A Twitter OAuth library.
-* [TwitterSDK](https://github.com/lyrixx/twitter-sdk) - A fully tested Twitter SDK.
 
-## Markup
+### Markup
 *Libraries for working with markup.*
 
 * [Cebe Markdown](https://github.com/cebe/markdown) - An fast and extensible Markdown parser.
-* [Ciconia](https://github.com/kzykhys/Ciconia) - Another Markdown parser that supports Github flavoured Markdown.
 * [CommonMark PHP](https://github.com/thephpleague/commonmark) - A Markdown parser which supports the full [CommonMark spec](http://spec.commonmark.org/).
 * [Decoda](https://github.com/milesj/decoda) - A lightweight markup parser library.
 * [Emoji](https://github.com/heyupdate/Emoji) - A library that converts unicode characters and names into emoji images.
@@ -637,13 +601,13 @@ Libraries to help manage database schemas and migrations.
 * [Parsedown](https://github.com/erusev/parsedown) - Another Markdown parser.
 * [PHP Markdown](https://github.com/michelf/php-markdown) - A Markdown parser.
 
-## Strings
+### Strings
 *Libraries for parsing and manipulating strings.*
 
 * [Agent](https://github.com/jenssegers/agent) - A PHP desktop/mobile user agent parser, based on Mobiledetect.
 * [ANSI to HTML5](https://github.com/sensiolabs/ansi-to-html) - An ANSI to HTML5 converter library.
 * [Color Jizz](https://github.com/mikeemoo/ColorJizz-PHP) - A library for manipulating and converting colours.
-* [Device Detector](https://github.com/piwik/device-detector) - Another library for parsing user agent strings.
+* [Device Detector](https://github.com/matomo-org/device-detector) - Another library for parsing user agent strings.
 * [Hoa String](https://github.com/hoaproject/Ustring) - Another UTF-8 string library.
 * [Jieba-PHP](https://github.com/fukuball/jieba-php) - A PHP port of Python's jieba. Chinese text segmentation for natural language processing.
 * [Mobile-Detect](https://github.com/serbanghita/Mobile-Detect) - A lightweight PHP class for detecting mobile devices (including tablets).
@@ -651,27 +615,23 @@ Libraries to help manage database schemas and migrations.
 * [Slugify](https://github.com/cocur/slugify) - A library to convert strings to slugs.
 * [SQL Formatter](https://github.com/jdorn/sql-formatter/) - A library for formatting SQL statements.
 * [Stringy](https://github.com/danielstjules/Stringy) - A string manipulation library with multibyte support.
-* [Text](https://github.com/kzykhys/Text) - A text manipulation library.
 * [UA Parser](https://github.com/tobie/ua-parser/tree/master/php) - A library for parsing user agent strings.
 * [URLify](https://github.com/jbroadway/urlify) - A PHP port of Django's URLify.js.
 * [UUID](https://github.com/ramsey/uuid) - A library for generating UUIDs.
 
-## Numbers
+### Numbers
 *Libraries for working with numbers.*
 
 * [ByteUnits](https://github.com/gabrielelana/byte-units) - A library to parse, format and convert byte units in binary and metric systems.
 * [LibPhoneNumber for PHP](https://github.com/giggsey/libphonenumber-for-php) - A PHP implementation of Google's phone number handling library.
-* [Math](https://github.com/moontoast/math) - A library for working with large numbers.
-* [Numbers PHP](https://github.com/powder96/numbers.php) - A library for working with numbers.
 * [PHP Conversion](https://github.com/Crisu83/php-conversion) - Another library for converting between units of measure.
 * [PHP Units of Measure](https://github.com/triplepoint/php-units-of-measure) - A library for converting between units of measure.
 
-## Filtering and Validation
+### Filtering and Validation
 *Libraries for filtering and validating data.*
 
 * [Aura.Filter](https://github.com/auraphp/Aura.Filter) - Provides tools to validate and sanitize objects and arrays.
 * [Cake Validation](https://github.com/cakephp/validation) - Another validation library (CP).
-* [DMS Filter](https://github.com/rdohms/DMS-Filter) - An annotation filtering library.
 * [Filterus](https://github.com/ircmaxell/filterus) - A simple PHP filtering library.
 * [ISO-codes](https://github.com/ronanguilloux/IsoCodes) - A library for validating inputs according standards from ISO, International Finance, Public Administrations, GS1, Book Industry, Phone numbers & Zipcodes for many countries
 * [MetaYaml](https://github.com/romaricdrigon/MetaYaml) - A schema validation library that supports YAML, JSON and XML.
@@ -680,7 +640,7 @@ Libraries to help manage database schemas and migrations.
 * [Valitron](https://github.com/vlucas/valitron) - Another validation library.
 * [Volan](https://github.com/serkin/Volan) - Another simplified validation library.
 
-## API
+### API
 *Libraries and web tools for developing APIs.*
 
 * [API Platform](https://api-platform.com ) - Expose in minutes an hypermedia REST API that embraces JSON-LD, Hydra format.
@@ -692,7 +652,7 @@ Libraries to help manage database schemas and migrations.
 * [Restler](https://github.com/Luracast/Restler) - A lightweight framework to expose PHP methods as RESTful web API.
 * [wsdl2phpgenerator](https://github.com/wsdl2phpgenerator/wsdl2phpgenerator) - A tool to generate PHP classes from SOAP WSDL files.
 
-## Caching
+### Caching
 *Libraries for caching data.*
 
 * [Alternative PHP Cache (APC)](http://php.net/manual/en/book.apc.php) - Open opcode cache for PHP.
@@ -704,10 +664,9 @@ Libraries to help manage database schemas and migrations.
 * [Stash](https://github.com/tedious/Stash) - Another library for caching.
 * [Zend Cache](https://github.com/zendframework/zend-cache) - Another caching library (ZF2).
 
-## Data Structure and Storage
+### Data Structure and Storage
 *Libraries that implement data structure or storage techniques.*
 
-* [Ardent](https://github.com/morrisonlevi/Ardent) - A library of data structures.
 * [Cake Collection](https://github.com/cakephp/collection) - A simple collections library (CP).
 * [Collections](https://github.com/italolelis/collections) - Collections Abstraction library for PHP.
 * [Fractal](https://github.com/thephpleague/fractal) - A library for converting complex data structures to JSON output.
@@ -715,88 +674,71 @@ Libraries to help manage database schemas and migrations.
 * [JsonMapper](https://github.com/cweiske/jsonmapper) - A library that maps nested JSON structures onto PHP classes.
 * [Knapsack](https://github.com/DusanKasan/Knapsack) - Collection library inspired by Clojure's sequences.
 * [msgpack.php](https://github.com/rybakit/msgpack.php) - A pure PHP implementation of the MessagePack serialization format.
-* [PHP Collections](https://github.com/schmittjoh/php-collection) - A simple collections library.
 * [PINQ](https://github.com/TimeToogo/Pinq) - A PHP library based on .NET's LINQ (Language Integrated Query).
 * [Porter](https://github.com/ScriptFUSION/Porter) - Data import abstraction framework.
 * [Serializer](https://github.com/schmittjoh/serializer) - A library for serialising and de-serialising data.
-* [Totem](https://github.com/Wisembly/Totem) - A library to manage and create data changesets.
 * [YaLinqo](https://github.com/Athari/YaLinqo) - Yet Another LINQ to Objects for PHP.
 * [Zend Serializer](https://github.com/zendframework/zend-serializer) - Another library for serialising and de-serialising data (ZF2).
 
-## Notifications
+### Notifications
 *Libraries for working with notification software.*
 
 * [JoliNotif](https://github.com/jolicode/JoliNotif) - A cross-platform library for desktop notification (support for Growl, notify-send, toaster, etc)
-* [Nod](https://github.com/filp/nod) - A notification library (e.g., Growl).
 * [Notification Pusher](https://github.com/Ph3nol/NotificationPusher) - A standalone library for device push notifications.
 * [Notificato](https://github.com/mac-cain13/notificato) - A library for handling push notifications.
 * [Notificator](https://github.com/namshi/notificator) - A lightweight notification library.
 * [Php-pushwoosh](https://github.com/gomoob/php-pushwoosh) - A PHP Library to easily send push notifications with the Pushwoosh REST Web Services.
 
-## Deployment
+### Deployment
 *Libraries for project deployment.*
 
 * [Deployer](https://github.com/deployphp/deployer) - A deployment tool.
 * [Envoy](https://github.com/laravel/envoy) - A tool to run SSH tasks with PHP.
-* [Plum](https://github.com/aerialls/Plum) - A deployer library.
-* [Pomander](https://github.com/tamagokun/pomander) - A deployment tool for PHP applications.
 * [Rocketeer](https://github.com/rocketeers/rocketeer) - A fast and easy deployer for the PHP world.
 
-## Internationalisation and Localisation
+### Internationalisation and Localisation
 *Libraries for Internationalization (I18n) and Localization (L10n).*
 
 * [Aura.Intl](https://github.com/auraphp/Aura.Intl) - Provides internationalization (I18N) tools, specifically package-oriented per-locale message translation.
 * [Cake I18n](https://github.com/cakephp/i18n) - Message translation and localization for dates and numbers (CP)
 
-## Third Party APIs
+### Third Party APIs
 *Libraries for accessing third party APIs.*
 
 * [Amazon Web Service SDK](https://github.com/aws/aws-sdk-php) - The official PHP AWS SDK library.
 * [Campaign Monitor](http://campaignmonitor.github.io/createsend-php/) - The official Campaign Monitor PHP library.
-* [Digital Ocean](https://github.com/toin0u/DigitalOcean) - A library to interface with the Digital Ocean API.
 * [Dropbox SDK](https://github.com/dropbox/dropbox-sdk-php) - The official PHP Dropbox SDK library.
-* [Github](https://github.com/dsyph3r/github-api3-php) - A library to interface with the Github API.
+* [Github](https://github.com/KnpLabs/php-github-api) - A library to interface with the Github API.
 * [Mailgun](https://github.com/mailgun/mailgun-php) The official Mailgun PHP API.
-* [PHP Github API](https://github.com/KnpLabs/php-github-api) - Another library to interface with the Github API.
-* [S3 Stream Wrapper](https://github.com/gwkunze/S3StreamWrapper) - A stream wrapper library for Amazon S3.
 * [Stripe](https://github.com/stripe/stripe-php) - The official Stripe PHP library.
 * [Twilio](https://github.com/twilio/twilio-php) - The official Twilio PHP REST API.
-* [Twitter OAuth](https://github.com/widop/twitter-oauth) - A library to interface with Twitter's OAuth workflow.
-* [Twitter REST](https://github.com/widop/twitter-rest) - A library to interact with Twitter's REST API.
 
-## Extensions
+### Extensions
 *Libraries to help build PHP extensions.*
 
 * [PHP CPP](http://www.php-cpp.com/) - A C++ library for developing PHP extensions.
 * [Zephir](https://github.com/phalcon/zephir) - A compiled language between PHP and C++ for developing PHP extensions.
 
-## Miscellaneous
+### Miscellaneous
 *Useful libraries or tools that don't fit in the categories above.*
 
 * [Annotations](https://github.com/doctrine/annotations) - An annotations library (part of Doctrine).
+* [BotMan](https://github.com/botman/botman) - A framework agnostic PHP library to build cross-platform chat bots.
 * [Cake Utility](https://github.com/cakephp/utility) - Utility classes such as Inflector, String, Hash, Security and Xml (CP).
 * [Chief](https://github.com/adamnicholson/Chief) - A command bus library.
 * [ClassPreloader](https://github.com/ClassPreloader/ClassPreloader) - A library for optimising autoloading.
 * [Country List](https://github.com/umpirsky/country-list) - A list of all countries with names and ISO 3166-1 codes.
 * [Embera](https://github.com/mpratt/Embera) - An Oembed consumer library.
 * [Essence](https://github.com/essence/essence) - A library for extracting web media.
-* [Flux](https://github.com/selvinortiz/flux) - A regular expression building library.
 * [Graphviz](https://github.com/alexandresalome/graphviz) - A Graphviz library.
 * [Hprose-PHP](https://github.com/hprose/hprose-php) - A very newbility RPC Library, support 25+ languages now.
 * [JSON Lint](https://github.com/Seldaek/jsonlint) - A JSON lint utility.
 * [JSONPCallbackValidator](https://github.com/willdurand/JsonpCallbackValidator) - A library for validating JSONP callbacks.
-* [Jumper](https://github.com/kakawait/Jumper) - A remote service executor library.
-* [LadyBug](https://github.com/raulfraile/Ladybug) - A dumper library.
-* [Lambda PHP](https://github.com/igorw/lambda-php) - A Lambda calculus interpreter in PHP.
-* [LiteCQRS](https://github.com/beberlei/litecqrs-php) - A CQRS (Command Query Responsibility Separation) library.
 * [Metrics](https://github.com/beberlei/metrics) - A simple metrics API library.
 * [noCAPTCHA](https://github.com/ARCANEDEV/noCAPTCHA) - Helper for Google's noCAPTCHA (reCAPTCHA).
 * [Nmap](https://github.com/willdurand/nmap) - A PHP wrapper around [Nmap](https://nmap.org/).
-* [Opengraph](https://github.com/euskadi31/Opengraph) - An opengraph library.
 * [Pagerfanta](https://github.com/whiteoctober/Pagerfanta) - A pagination library.
-* [PHP Expression](https://github.com/Kitano/php-expression) - A PHP expression language.
 * [PHP PassBook](https://github.com/eymengunay/php-passbook) - A PHP library for iOS PassBook.
-* [PHP-GPIO](https://github.com/ronanguilloux/php-gpio) - A library for playing with the Raspberry PI's GPIO pins.
 * [PHP-ML](https://github.com/php-ai/php-ml) - A library for Machine Learning in PHP.
 * [PHPCR](https://github.com/phpcr/phpcr) - A PHP port of the Java Content Repository (JCR).
 * [PHPStack](http://dunkels.com/adam/phpstack/) - A TCP/IP stack proof of concept written in PHP.
@@ -804,10 +746,9 @@ Libraries to help manage database schemas and migrations.
 * [Procrastinator](https://github.com/lstrojny/Procrastinator) - A library for running time consuming tasks.
 * [Prooph Service Bus](https://github.com/prooph/service-bus) - Lightweight message bus supporting CQRS and Micro Services
 * [RMT](https://github.com/liip/RMT) - A library for versioning and releasing software.
-* [sabre/vobject](https://github.com/fruux/sabre-vobject) - A library for parsing VCard and iCalendar objects.
+* [sabre/vobject](https://github.com/sabre-io/vobject) - A library for parsing VCard and iCalendar objects.
 * [Slimdump](https://github.com/webfactory/slimdump) - An easy dumper tool for MySQL.
 * [Spork](https://github.com/kriswallsmith/spork) - A process forking library.
-* [Sslurp](https://github.com/EvanDotPro/Sslurp) - A library that makes dealing with SSL suck less.
 * [SuperClosure](https://github.com/jeremeamia/super_closure) - A library that allows Closures to be serialized.
 * [Symfony VarDumper](http://symfony.com/doc/current/components/var_dumper.html) - A variable dumper component (SF).
 * [Underscore](http://anahkiasen.github.io/underscore-php/) - A PHP port of the Underscore JS library.
@@ -816,44 +757,44 @@ Libraries to help manage database schemas and migrations.
 # Software
 *Software for creating a development environment.*
 
-## PHP Installation
+### PHP Installation
 *Tools to help install and manage PHP on your computer.*
 
 * [HomeBrew PHP](https://github.com/Homebrew/homebrew-php) - A PHP tap for HomeBrew.
 * [HomeBrew](https://brew.sh/) - A package manager for OSX.
 * [PHP Brew](https://github.com/phpbrew/phpbrew) - A PHP version manager and installer.
 * [PHP Build](https://github.com/php-build/php-build) - Another PHP version installer.
-* [PHP Env](https://github.com/CHH/phpenv) - Another PHP version manager.
 * [PHP OSX](https://php-osx.liip.ch/) - A PHP installer for OSX.
-* [PHP Switch](https://github.com/jubianchi/phpswitch) - Another version manager.
 * [VirtPHP](http://virtphp.org/) - A tool for creating and managing isolated PHP environments.
 
-## Development Environment
+### Development Environment
 *Software and tools for creating a sandboxed development environment.*
 
 * [Ansible](https://www.ansible.com/) - A radically simple orchestration framework.
 * [Phansible](http://phansible.com/) - A web tool for building PHP development virtual machines with Ansible.
-* [Protobox](http://getprotobox.com/) - Another web tool for building PHP development virtual machines.
+* [Protobox](https://www.getprotobox.com/) - Another web tool for building PHP development virtual machines.
 * [PuPHPet](https://puphpet.com/) - A web tool for building PHP development virtual machines.
 * [Puppet](https://puppet.com/) - A server automation framework and application.
 * [Vagrant](https://www.vagrantup.com/) - A portable development environment utility.
 * [Docker](https://www.docker.com/) - A containerization platform.
 
-## Virtual Machines
+### Virtual Machines
 *Alternative PHP virtual machines.*
 
 * [Hack](http://hacklang.org/) - A programming language for HHVM that interoperates seamlessly with PHP.
 * [HHVM](https://github.com/facebook/hhvm) - A Virtual Machine, Runtime and JIT for PHP by Facebook.
-* [HippyVM](https://github.com/hippyvm/hippyvm) - Another PHP virtual machine.
 
-## Integrated Development Environment
-*Integrated Development Environments with support for PHP.*
+### Text Editors and IDEs
+*Text Editors and Integrated Development Environments (IDE) with support for PHP.*
 
+* [Atom](https://atom.io/) - A hackable text editor.
+* [Atom IDE](https://ide.atom.io/) - An IDE extension for Atom.
 * [Eclipse for PHP Developers](https://www.eclipse.org/downloads/) - A PHP IDE based on the Eclipse platform.
 * [Netbeans](https://netbeans.org) - An IDE with support for PHP and HTML5.
 * [PhpStorm](http://www.jetbrains.com/phpstorm/) - A commercial PHP IDE.
+* [VS Code](https://code.visualstudio.com/) - An open source code editor.
 
-## Web Applications
+### Web Applications
 *Web-based applications and tools.*
 
 * [3V4L](https://3v4l.org/) - An online PHP & HHVM shell.
@@ -861,28 +802,27 @@ Libraries to help manage database schemas and migrations.
 * [PHP Queue](https://github.com/CoderKungfu/php-queue) - An application for managing queueing backends.
 * [MailCatcher](https://github.com/sj26/mailcatcher) - A web tool for capturing and viewing emails.
 * [Cachet](https://github.com/cachethq/cachet) - The open source status page system.
-* [phpBeanstalkdAdmin](https://github.com/mnapoli/phpBeanstalkdAdmin) - Monitoring and administration interface for Beanstalkd.
 * [phpRedisAdmin](https://github.com/ErikDubbelboer/phpRedisAdmin) - A simple web interface to manage [Redis](https://redis.io/) databases.
-* [phpPgAdmin](https://github.com/phppgadmin/phppgadmin) - A web-based administration tool for PostgreSQL.
 * [phpMyAdmin](https://github.com/phpmyadmin/phpmyadmin) - A web interface for MySQL/MariaDB.
 * [Adminer](https://www.adminer.org/) - Database management in a single PHP file.
 * [Grav](https://github.com/getgrav/grav) - A modern flat-file CMS.
+* [Lychee](https://github.com/electerious/Lychee) - An easy to use and great looking photo-management-system.
 
-## Infrastructure
+### Infrastructure
 *Infrastructure for providing PHP applications and services.*
 
-* [appserver.io](http://appserver.io/) - A multithreaded application server for PHP, written in PHP.
+* [appserver.io](https://appserver.io/) - A multithreaded application server for PHP, written in PHP.
 * [php-pm](https://github.com/php-pm/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
+### PHP Websites
 *Useful PHP-related websites.*
 
 * [Nomad PHP](https://nomadphp.com/) - A online PHP learning resource.
 * [PHP Best Practices](https://phpbestpractices.org/) - A PHP best practice guide.
-* [PHP FIG](http://www.php-fig.org/) - The PHP Framework Interoperability Group.
+* [PHP FIG](https://www.php-fig.org/) - The PHP Framework Interoperability Group.
 * [PHP Mentoring](https://php-mentoring.org/) - Peer to peer PHP mentorship organization.
 * [PHP Package Development Standards](http://php-pds.com) - Package development standards for PHP.
 * [PHP School](https://www.phpschool.io/) - Open Source Learning for PHP.
@@ -894,23 +834,25 @@ Various resources, such as books, websites and articles, for improving your PHP
 * [PHPTrends](https://phptrends.com/) - An overview of fastest growing PHP libraries.
 * [Securing PHP](http://securingphp.com/) - A newsletter about PHP security and library recommendations.
 * [Seven PHP](https://7php.com/) - A website that interviews members of the PHP community.
+* [PHP Annotated Monthly](https://blog.jetbrains.com/phpstorm/category/php-annotated-monthly/) - A monthly digest of PHP news.
 
-## Other Websites
+### Other Websites
 *Useful websites related to web development.*
 
 * [Atlassian Git Tutorials](https://www.atlassian.com/git) - A series of Git tutorials.
 * [Hg Init](http://hginit.com/) - A series of Mercurial tutorials.
-* [Semantic Versioning](http://semver.org/) - A website explaining semantic versioning.
+* [Learning Linux](https://linuxjourney.com/) - A website for learning Linux.
+* [Semantic Versioning](https://semver.org/) - A website explaining semantic versioning.
 * [Servers for Hackers](https://serversforhackers.com/) - A newsletter about server management.
 * [The Open Web Application Security Project (OWASP)](https://www.owasp.org/index.php/Main_Page) - An open software security community.
 * [WebSec IO](https://websec.io/) - A web security community resource.
 
-## PHP Books
+### PHP Books
 *Fantastic PHP-related books.*
 
 * [Functional Programming in PHP](https://www.functionalphp.com/) - This book will show you how to leverage these new PHP5.3+ features by understanding functional programming principles
 * [Grumpy PHPUnit](https://leanpub.com/grumpy-phpunit) - A book about unit testing with PHPUnit by Chris Hartjes.
-* [Mastering Object-Orientated PHP](http://www.brandonsavage.net) - A book about object-orientated PHP by Brandon Savage.
+* [Mastering Object-Orientated PHP](https://www.brandonsavage.net/) - A book about object-orientated PHP by Brandon Savage.
 * [Modern PHP New Features and Good Practices](http://shop.oreilly.com/product/0636920033868.do) - A book about new PHP features and best practices by Josh Lockhart.
 * [Modernizing Legacy Applications in PHP](https://leanpub.com/mlaphp) - A book about modernizing legacy PHP applications by Paul M. Jones.
 * [PHP 7 Upgrade Guide](https://leanpub.com/php7) - An ebook covering all of the features and changes in PHP 7 by Colin O'Dell.
@@ -922,7 +864,7 @@ Various resources, such as books, websites and articles, for improving your PHP
 * [XML Parsing with PHP](https://www.phparch.com/books/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](https://leanpub.com/ddd-in-php) - Real examples written in PHP showcasing DDD Architectural Styles.
 
-## Other Books
+### Other Books
 *Books related to general computing and web development.*
 
 * [Elasticsearch: The Definitive Guide](https://www.elastic.co/guide/index.html) - A guide to working with Elasticsearch by Clinton Gormley and Zachary Tong.
@@ -934,7 +876,7 @@ Various resources, such as books, websites and articles, for improving your PHP
 * [Understanding Computation](http://computationbook.com) - A book about computation theory by Tom Stuart.
 * [Vagrant Cookbook](https://leanpub.com/vagrantcookbook) - A book about creating Vagrant environments by Erika Heidi.
 
-## PHP Videos
+### PHP Videos
 *Fantastic PHP-related videos.*
 
 * [Nomad PHP Lightning Talks](https://www.youtube.com/c/nomadphp) - 10 to 15 minute Lightning Talks by PHP community members.
@@ -942,30 +884,31 @@ Various resources, such as books, websites and articles, for improving your PHP
 * [Programming with Anthony](https://www.youtube.com/playlist?list=PLM-218uGSX3DQ3KsB5NJnuOqPqc5CW2kW) - A video series by Anthony Ferrara.
 * [Taking PHP Seriously](https://www.infoq.com/presentations/php-history) - A talk outlining PHP's strengths by Keith Adams of Facebook.
 
-## PHP Podcasts
-*Podcasts with a main focus on PHP topics*
+### PHP Podcasts
+*Podcasts with a focus on PHP topics.*
 
 * [PHP Town Hall](https://phptownhall.com/) - A casual PHP podcast by Ben Edmunds and Phil Sturgeon.
 * [Voices of the ElePHPant](https://voicesoftheelephpant.com/) Interviews with the people that make the PHP community special.
 * [PHP Roundtable](https://www.phproundtable.com/) - The PHP Roundtable is a casual gathering of developers discussing topics that PHP nerds care about.
 
-## PHP Reading
+### PHP Reading
 *PHP-releated reading materials.*
 
 * [Composer Primer](https://daylerees.com/composer-primer/) - A Composer primer.
 * [Composer Stability Flags](https://igor.io/2013/02/07/composer-stability-flags.html) - An article about Composer stability flags.
 * [Composer Versioning](https://igor.io/2013/01/07/composer-versioning.html) - An article about Composer versioning.
 * [Create Your Own PHP Framework](http://fabien.potencier.org/create-your-own-framework-on-top-of-the-symfony2-components-part-1.html) - A series of articles on how to make your own PHP framework by Fabien Potencier.
-* [Don't Worry About BREACH](http://blog.ircmaxell.com/2013/08/dont-worry-about-breach.html) - An article about the BREACH hack and CSRF tokens.
+* [Don't Worry About BREACH](https://blog.ircmaxell.com/2013/08/dont-worry-about-breach.html) - An article about the BREACH hack and CSRF tokens.
 * [On PHP 5.3, Lambda Functions and Closures](http://fabien.potencier.org/on-php-5-3-lambda-functions-and-closures.html) - An article about lambda functions and closures.
 * [PHP Is Much Better Than You Think](http://fabien.potencier.org/php-is-much-better-than-you-think.html) - An article about the PHP language and ecosystem.
 * [PHP Package Checklist](http://phppackagechecklist.com/) - A checklist for successful PHP package development.
-* [PHP Sucks! But I Like It!](http://blog.ircmaxell.com/2012/04/php-sucks-but-i-like-it.html) - An article about the pros and cons of PHP.
-* [Preventing CSRF Attacks](http://blog.ircmaxell.com/2013/02/preventing-csrf-attacks.html) - An article on preventing CSRF attacks.
-* [Seven Ways to Screw Up BCrypt](http://blog.ircmaxell.com/2012/12/seven-ways-to-screw-up-bcrypt.html) - An article about correct BCrypt implementation.
+* [PHP Sucks! But I Like It!](https://blog.ircmaxell.com/2012/04/php-sucks-but-i-like-it.html) - An article about the pros and cons of PHP.
+* [Preventing CSRF Attacks](https://blog.ircmaxell.com/2013/02/preventing-csrf-attacks.html) - An article on preventing CSRF attacks.
+* [Seven Ways to Screw Up BCrypt](https://blog.ircmaxell.com/2012/12/seven-ways-to-screw-up-bcrypt.html) - An article about correct BCrypt implementation.
+* [The 2018 Guide to Building Secure PHP Software](https://paragonie.com/blog/2017/12/2018-guide-building-secure-php-software) - A guide to building secure PHP software.
 * [Use Env](https://seancoates.com/blogs/use-env/) - An article about using the unix environment helper.
 
-## PHP Internals Reading
+### PHP Internals Reading
 *Reading materials related to the PHP internals or performance.*
 
 * [Disproving the Single Quotes Myth](http://nikic.github.io/2012/01/09/Disproving-the-Single-Quotes-Performance-Myth.html) - An article about performance of single and double quoted strings.
@@ -982,9 +925,9 @@ Various resources, such as books, websites and articles, for improving your PHP
 * [Why Objects (Usually) Use Less Memory Than Arrays](https://gist.github.com/nikic/5015323) - An article about object and array internals.
 * [You're Being Lied To](http://blog.golemon.com/2007/01/youre-being-lied-to.html) - An article about internal ZVALs.
 * Collecting Garbage: [1](http://php.net/manual/en/features.gc.refcounting-basics.php) [2](http://php.net/manual/en/features.gc.collecting-cycles.php) [3](http://php.net/manual/en/features.gc.performance-considerations.php) - A series about the PHP garbage collection internals.
-* PHP Source Code for Developers: [1](http://blog.ircmaxell.com/2012/03/phps-source-code-for-php-developers.html) [2](http://nikic.github.io/2012/03/16/Understanding-PHPs-internal-function-definitions.html) [3](http://blog.ircmaxell.com/2012/03/phps-source-code-for-php-developers_21.html) [4](http://nikic.github.io/2012/03/28/Understanding-PHPs-internal-array-implementation.html) - A series about the PHP source code.
+* PHP Source Code for Developers: [1](https://blog.ircmaxell.com/2012/03/phps-source-code-for-php-developers.html) [2](http://nikic.github.io/2012/03/16/Understanding-PHPs-internal-function-definitions.html) [3](https://blog.ircmaxell.com/2012/03/phps-source-code-for-php-developers_21.html) [4](http://nikic.github.io/2012/03/28/Understanding-PHPs-internal-array-implementation.html) - A series about the PHP source code.
 
-## PHP Magazines
+### PHP Magazines
 *Fantastic PHP-related magazines.*
 
 * [php[architect]](https://www.phparch.com/magazine/) - A monthly magazine dedicated to PHP.