[PHP resources] PHP resource collection

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Dependency Management

Dependency and package management library

• Composer/Packagist: a package and dependency manager
• Composer Installers: A multi-framework Composer library installer
• Pickle: A PHP extension installer

Other dependency management

Other related dependency management

• Satis: A static Composer repository generator
• Composition: A library that checks the Composer environment at runtime
• Version: Semantic version parsing and comparison library
• NameSpacer - A library that converts underscores into namespaces
• Patch Installer - A library for installing patches using Composer
• Composer Checker - A tool to verify Composer configuration

Framework

Web Development Framework

• Symfony2 - a framework composed of independent components
• Zend Framework 2 – Another framework composed of independent components
• Laravel 4 – Another PHP framework
• Aura PHP - a framework for independent components
• Yii2 - Another PHP framework
• Nette - Another framework composed of individual components
• PPI Framework 2 - an interoperability framework
• Phalcon - a framework implemented via C extensions

Other frameworks

Other web development frameworks

• Symfony CMF - Content management framework for creating custom CMS
• Knp RAD Bundle - Rapid Application (RAD) package for Symfony 2

Framework components

Independent components from web development frameworks

• Symfony2 Components -Symfony2 components
• Zend Framework 2 Components -ZF2 components
• Aura Components -PHP5.4 component package
• Hoa Project – Another PHP component package

Micro Framework

Micro Frameworks and Routing

• Silex - a micro-framework based on Symfony2 components
• Slim - Another simple micro framework
• Bullet PHP - A micro-framework for building REST APIs
• Fast Route - Fast routing library
• Pux - Another fast routing library

Other microframeworks

Other related micro-frameworks and routing

• Silex Skeleton -Silex project architecture
• Silex Web Profiler -Silex web debugging toolbar
• Stack - Stackable middleware library for Silex/Symfony
• Slim Skeleton -Slim architecture
• Slim View - Slim’s custom view collection
• Slim Middleware -Slim’s custom middleware collection

Template

Libraries and tools for templating and lexical analysis

• Twig - a comprehensive template language
• Twig Cache Extension - A template fragment caching library for Twig
• Mustache - A PHP implementation of the Mustache template language
• Phly Mustache - Another PHP implementation of the Mustache template language
• MtHaml - A PHP implementation of HAML template language
• PHPTAL - A PHP implementation of the TAL template language
• Plates - a native PHP template library
• Lex - A lightweight template parser

Static Site Generator

Preprocessing tools to generate the content of web pages.

• Sculpin - Tool to convert Markdown and Twig to static HTML
• Phrozn - Another tool to convert Textile, Markdown and Twig to HTML

HTTP

Library for HTTP and website scraping

• Guzzle - A comprehensive HTTP client
• Buzz - Another HTTP client
• Requests - A simple HTTP library
• HTTPFul - A chained HTTP library
• Goutte - A simple web crawler
• PHP VCR - Library for recording and replaying HTTP requests

URL

Library for parsing URLs

• Purl - a URL processing library
• PHP Domain Parser - a local prefix parsing library

Email

Library for sending and parsing emails

• SwiftMailer - An email solution
• PHPMailer - Another email solution
• Fetch - an IMAP library
• Email Reply Parser - an email reply parsing library
• Stampie - Mail service library, inferior to SendGrid, PostMark, MailGun and Mandrill.
• CssToInlineStyles - A library for inlining CSS in email templates

File

File processing and MIME type detection library

• Gaufrette - a file system abstraction layer
• Flysystem - Another file system abstraction layer
• Canal - A library to detect internet media types
• Apache MIME Types - A library for parsing Apache MIME types
• Ferret - A MIME detection library
• Hoa Mime - Another MIME detection library
• Lurker - a resource tracking library
• PHP File Locator - A library for locating files in large projects
• PHP FFmpeg - A library for FFmpeg video packaging.
• CSV - A CSV data processing library

Streams Streams

Library for processing streams

• Streamer - An object-oriented stream packaging library

Dependency Injection Dependency Injection

Library that implements dependency injection design pattern

• Pimple - A small dependency injection container
• Auryn - Another dependency injection container
• Orno Di - Another scalable dependency injection container
• PHP DI - A dependency injection implemented using annotations
• Acclimate - A common interface for dependency injection containers and service location

Image

Library for processing images

• Imagine - an image processing library
• PHP Image Workshop -Another image processing library
• Intervention Image - Another image processing library
• GIF Frame Extractor - A library for extracting GIF animation frame information
• GIF Creator - A library for creating animated GIFs from multiple images
• Image With Text - A library to embed text in images
• Color Extractor - A library to extract colors from images

Testing

Library for testing code and generating test data

• PHPUnit - a unit testing framework
• DBUnit - PHPUnit’s database testing library
• ParaTest - Parallel testing library for PHPUnit
• PHPSpec - Unit testing library based on function point design
• Codeception - A full stack testing framework
• AspectMock - PHPUnit/ Codeception simulation framework.
• Atoum - a simple testing library
• Mockery - A mock object library for testing
• Phake - Another mock object library for testing
• Prophecy - a highly optional simulation framework
• Faker - a fake data generation library
• Samsui - Another fake data generation library
• Alice - Expressive generation library
• Behat - A Behavior Driven Development (BDD) testing framework
• Pho - A behavior-driven development testing framework
• Mink -Web Acceptance Test
• HTTP Mock - A library to simulate HTTP requests in unit tests
• VFS Stream - A wrapper for virtual file system streams for testing
• VFS - Another virtual file system for testing
• Locust - A modern load testing library written in Python

Continuous Integration Continuous Integration

Continuously integrated libraries and applications

• Travis CI - A continuous integration platform
• PHPCI - an open source continuous integration platform for PHP
• Sismo - A continuous testing service library
• Jenkins is a continuous integration platform supported by PHP
• JoliCi - A Docker-powered continuous integration client written in PHP

Documentation

Library for generating project documentation

• Sami - an API documentation generator
• APIGen - Another API documentation generator
• PHP Documentor 2 - An API documentation generator
• phpDox - A documentation generator for PHP projects (not limited to API documentation)

Security

Library for generating secure random numbers, encrypting data, and scanning for vulnerabilities

• HTML Purifier - A standards-compliant HTML filter
• RandomLib - A library for generating random numbers and strings
• True Random - A library for generating random numbers using www.random.org
• SecurityMultiTool - a PHP security library
• PHPSecLib - A pure PHP secure communication library
• TCrypto - A simple key-value encryption repository
• PHP IDS - A structured PHP security layer
• PHP SSH - An experimental object-oriented SSH wrapper library
• IniScan - A library for scanning PHP INI file security
• SensioLabs Security Check - A web tool that provides security recommendations for checking Composer dependencies
• Zed - An integrated web application penetration testing tool

Passwords

Libraries and tools for handling and storing passwords

• Password Compat - A new compatibility library for PHP5.5 password functions
• phpass - A portable password hashing framework
• PHP Password Lib - A library for generating and verifying passwords
• Password Policy - A password policy library for PHP and JavaScript
• Password Validator - A library for verifying and updating password hashes
• Zxcvbn PHP - A realistic PHP password strength estimation library based on Zxcvbn JS

Code Analysis code analysis

Tools to analyze, parse and process libraries of your code base

• PHP Parser - A PHP parser written in PHP
• PHPPHP - A PHP virtual machine implemented by PHP
• PHPSandbox - A PHP sandbox environment
• Dissect - A collection of lexical and syntactic analysis tools
• PHP Mess Detector - A library that scans for code defects, suboptimal code, unused parameters, and more.
• PHP Code Sniffer - A library that detects PHP, CSS and JS code standards conflicts
• PHPCPD - A library to detect copied and pasted code
• PHP Analyser - A library that analyzes PHP code to find defects and errors
• PHP CS Fixer - A coding standards library
• PHP Manipulator - A library for analyzing and modifying PHP source code
• PHP Metrics - a static measurement library
• PHP Refactoring Browser - A command line toolset for refactoring PHP code
• UBench - A simple micro-benchmarking library
• Athletic - An annotation-based benchmarking library
• Mondrian - Use code analysis tools using graph theory
• Scrutinizer - A web tool for reviewing PHP code
• PHPLOC - A tool to quickly measure the size of your PHP project
• xHprof - Another PHP profiling tool
• PHPCcheckstyle - A tool to help adhere to specific coding conventions.

Debugging

Libraries and tools for debugging code

• xDebug - A tool for debugging and analyzing PHP
• PHP Debug Bar - A debugging toolbar
• PHP Console - a web debugging console
• Barbushin PHP Console - Another web debugging console for Google Chrome
• PHPDBG - An interactive PHP debugger
• Tracy - A simple error detection, logging and time measurement library

Build Tools

Project building and automation tools

• Go - A simple PHP build tool
• Bob - A simple project automation tool
• Phake - a PHP clone library
• Box - A tool for building PHAR files
• Phing - A PHP project build system inspired by Apache Ant

Task Runners

Library for automatically running tasks

• Task - A pure PHP task runner inspired by Grunt and Gulp
• Robo - An object-oriented configured PHP task runner
• Bldr - A PHP task runner built on Symfony components

Navigation

Tools for building navigation structures

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

Asset Management Resource Management

Tools to manage, compress and minimize web site resources

• Assetic - An asset management pipeline library
• Pipe - Another pipeline library for resource management
• Munee - a resource optimization library
• JShrink - A JavaScript minimization library
• Puli - A library for detecting absolute paths to resources

Geolocation

Library for geocoding addresses and using latitude and longitude.

• GeoCoder - a geocoding library
• GeoTools - a library related to geographical tools
• PHPGeo - A simple geography library
• GeoJSON - An implementation of geographic JSON

Date and Time

Library for handling dates and times

• Carbon - A simple date and time API extension
• ExpressiveDate - Another date time API extension
• CalendR - A calendar management library

Event Event

Library for time-driven or non-blocking event loop implementation

• React - An event-driven non-blocking I/O library
• Rx.PHP - A reactive extension library
• Ratchet - A web socket library
• Hoa WebSocket - Another web socket library
• Hoa EventSource - an event source library
• Evenement - an event distribution library
• FuelPHP Event - Another event distribution library

Logging

Library for generating and processing log files

• Monolog - A comprehensive logging tool
• KLogger - An easy-to-use PSR-3 compatible logging class

E-commerce

Libraries and apps for processing payments and building online e-commerce stores

• OmniPay - A framework hybrid library for multi-gateway payment processing
• Payum - A payment abstraction library
• Sylius - An open source e-commerce solution
• Thelia - Another open source e-commerce solution
• Money - A PHP implementation of Fowler’s money model
• Sebastian Money - Another library for handling monetary values
• Swap - an exchange rate library

PDF

Libraries and software for processing PDF files

• Snappy - a PDF and image generator library
• WKHTMLToPDF - A tool to convert HTML to PDF

Database database

Database interaction library using Object Relational Mapping (ORM) or data mapping technology

• Doctrine - A comprehensive DBAL and ORM
• Doctrine Extensions - A collection of Doctrine behavioral extensions
• Propel - A fast ORM, migration library and query builder
• Eloquent -Laravel 4 ORM
• Baum - An Eloquent nested set implementation
• Spot2 - An ORM mapper for MySQL
• RedBean - A lightweight, low-configuration ORM
• Pomm - A PostgreSQL object model manager
• ProxyManager - A toolset for generating proxy objects for data mapping

Migrations

Library to help manage database schemas and migrations

• PHPMig - Another migration management library
• Phinx - Another database migration management library
• Migrations - a migration management library
• Doctrine Migrations - a Doctrine migration library

NoSQL

Libraries for handling NoSQL backends

• MongoQB - A MongoDB query building library
• Monga - a MongoDB abstraction library
• Predis - A fully functional Redis library

Queue Queue

Library for handling events and task queues

• Pheanstalk - a Beanstalkd client library
• PHP AMQP - A pure PHP AMQP library
• Thumper - A RabbitMQ pattern library
• Bernard - A multi-backend abstraction library

Search Search

Libraries and software that index and perform queries on data

• ElasticSearch PHP - ElasticSearch’s official client library
• Elastica - Client library for ElasticSearch
• Solarium - Client library for Solr
• SphinxQL query builder -Query library for Sphinx search engine

Command Line

Library for building command line tools

• Boris - A Micro PHP REPL
• PsySH - Another micro PHP REPL
• Pecan - an event-driven and non-blocking kernel
• GetOpt - A command line selection parser
• OptParse - Another command line options parser
• Commando - Another simple command line selection parser
• GetOptionKit - Another command line options parser
• Cron Expression - Library to calculate cron run date
• ShellWrap - A simple command line wrapping library
• Hoa Console - Another command line library
• Shunt - A library for running command lines in parallel on multiple remote machines
• Cilex - A micro-framework for building command line tools

Authentication

Library that implements authentication

• Sentry - A hybrid authentication and authorization framework library
• Sentry Social - A social network authentication library
• Opauth - A multi-channel authentication framework
• OAuth2 - An OAuth2 authentication service, resource server and client library
• OAuth2 Server - Another OAuth2 server implementation
• PHP oAuthLib - Another OAuth library
• TwitterOAuth - A Twitter OAuth library
• TwitterSDK - A fully tested Twitter SDK
• Hawk - A Hawk HTTP authentication library
• HybridAuth - an open source social login library

Markup Markup

Library for handling tags

• Decoda - A lightweight tag parsing library
• PHP Markdown - a Markdown parser
• CommonMark PHP - A Markdown parser that fully supports CommonMark spec
• Dflydev Markdown - Another Markdown parser
• Parsedown - Another Markdown parser
• Ciconia - Another Markdown parser that supports Github Markdown style
• Cebe Markdown - A fast and extensible Markdown parser
• HTML5 PHP - An HTML5 parsing and serialization library

Strings

Library for parsing and processing strings

• ANSI to HTML5 - ANSI to HTML5 conversion library
• Patchwork UTF-8 - A portable library for handling UTF-8 strings
• Hoa String - Another UTF-8 string library
• Stringy - A string processing library with multi-byte support
• Color Jizz - A library for processing and converting colors
• UUID - Library for generating UUIDs
• Slugify - A library that converts strings to slugs
• Urlify - A URLify.jsPHP channel for Django
• Text - A text processing library
• SQL Formatter - A library for formatting SQL statements
• UA Parser - A library for parsing user agent strings

Numbers

Library for processing numbers

• Numbers PHP - library for processing numbers
• Math - a library for handling large numbers
• ByteUnits - Library for parsing, formatting and converting byte units in binary and metric systems
• PHP Units of Measure - A library for unit of measurement conversion
• PHP Conversion - Another library for unit of measurement conversion
• LibPhoneNumber for PHP - PHP implementation library for Google phone number processing

Filtering and Validation

Library for filtering and validating data

• Filterus - A simple PHP filtering library
• Respect Validate - A simple validation library
• Valitron - Another validation library
• Upload - A library that handles file uploading and verification
• DMS Filter - A comment filtering library
• MetaYaml - A schema validation library supporting YAML, JSON and XML
• ISO-codes - Library for validating various ISO and ZIP encodings (IBAN, SWIFT/BIC, BBAN, VAT, SSN, UKNIN)

REST and API

Libraries and web tools for developing REST-ful APIs

• Apigility - An API builder built with Zend Framework 2
• Hateoas - A HOATEOAS REST web service library
• HAL - A Hypertext Application Language (HAL) building library
• Negotiation - A content negotiation library
• Drest - A library that exposes Doctrine entities as REST resource nodes
• Restler - A lightweight framework that exposes PHP methods as RESTful web API

Caching

Library for caching data

• Alternative PHP Cache (APC) - Turn on PHP pseudo code cache
• Cache - a caching library (Doctrine part)
• Stash - Another cache library

Data structure and storage

Libraries that implement data structures and storage technologies

• Ardent - a data structure library
• PHP Collections - A simple collection library
• Serializer - A library to serialize and deserialize data
• PHP Object Storage - an object storage library
• Fractal - A library for converting complex data structures into JSON output
• Totem - A library for managing and exchanging sets of item data
• PINQ - A PHP real-time Linq library
• JsonMapper - A library that maps embedded JSON structures to PHP classes

Notifications

Library for handling notification software

• Nod - a notification library (Growl, etc.)
• Notificato - A library for handling push notifications
• Notification Pusher - An independent library for device push notifications
• Notificator - A lightweight notification library

Deployment Deployment

Project deployment library

• Pomander - A PHP application deployment tool
• Rocketeer - A fast and simple deployer in the PHP world
• Envoy - A tool to run SSH tasks with PHP
• Plum - a deployment library

Internationalization and localization

Internationalization (I18n) and localization (L10n)

• Aura.Intl

Third Party API

Libraries to access third-party APIs

• Amazon Web Service SDK - PHP AWS SDK official library
• S3 Stream Wrapper -Amazon S3 stream packaging library
• Stripe -Stripe official PHP library
• Campaign Monitor -Campaign Monitor official PHP library
• Digital Ocean -Digital Ocean API interface library
• Github - Github API interaction library
• PHP Github API - Another Github API interaction library
• Twitter OAuth -Twitter OAuth workflow interaction library
• Twitter REST - Twitter REST API interaction library
• Dropbox SDK - The official PHP Dropbox SDK library.
• Dropbox SDK - Dropbox SDK official PHP library
• Twilio - The official Twilio PHP REST API.
• Twilio - Twilio Official PHP REST API
• Mailgun The official Mailgun PHP API.
• Mailgun Mailgun official PHP REST API

Extensions

Help the group build a PHP extension library

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

Miscellaneous

Useful libraries and tools not in the categories above

• Spork - A library that handles forking
• JSON Lint - A JSON lint tool
• JSONPCallbackValidator - Library to validate JSONP callbacks
• Pagerfanta - a paging library
• Ruler - A simple stateless production environment rules engine.
• LiteCQRS - A CQRS (Command Query Responsibility Separation) library
• Sslurp - A library that reduces SSL processing
• PHP Option an optional type library
• Metrics - A simple metrics API library
• Sabre VObject - A library for parsing VCard and iCalendar objects
• Annotations - an annotation library (Doctrine part)
• Whoops - A good error handling library
• Finite - A simple PHP finite state machine
• LadyBug - a dumper library
• Procrastinator - a library for running time-consuming tasks
• Compose - a function combination library
• SuperClosure - A library that allows closure serialization
• Jumper - a remote service execution library
• Underscore - A PHP implementation of the Underscore JS library
• PHP PassBook - An iOS PassBook PHP library
• PHP Expression - A PHP expression language
• RMT - A library for writing versions and publishing software
• Wise - A configuration manager
• Opengraph - an open gallery
• Essence - A library for extracting web media
• Embera - an Oembed consumption library
• Graphviz - a graphics library
• Monad PHP A simple Monad library
• Flux - a regular expression building library
• Patchwork - A function library that redefines users
• Galapagos - Language Switch Evolution
• Design Patterns PHP - A design pattern repository implemented in PHP
• PHPCR - A PHP implementation of Java Content Repository (JCR)
• Functional PHP - A functional programming library
• ClassPreloader - A library that optimizes automatic loading
• Lib Country - A library of country and region data
• Lib Accessor - A library that simplifies access
• PHPStack - A TCP/IP stack concept written in PHP
• Nmap - An Nmap PHP wrapper
• Code Mover - A library for moving code
• Iter - A library that provides iteration primitives using generators
• Lambda PHP - A Lambda calculation parser in PHP
• Country List - List of all countries with name and ISO 3166-1 encoding
• PHP-GPIO - Library for GPIO pins of Raspberry PI
• print_o - An object graph visualizer
• Alias ​​- a category name library

Software

Software that creates a development environment

PHP installation

Tools to help install and manage PHP on your computer

• HomeBrew - An OSX package manager
• HomeBrew PHP - A PHP channel for HomeBrew
• PHP OSX - A PHP installer for OSX
• PHP Brew - A PHP version manager and installer
• PHP Env – Another PHP version manager
• PHP Switch - Another PHP version manager
• PHP Build - Another PHP version installer
• VirtPHP - A tool to create and manage independent PHP environments

Development Environment Development Environment

Software and tools for creating sandbox development environments

• Vagrant - a portable development environment tool
• Ansible - A very simple orchestration framework
• Puppet - a server automation framework and application
• PuPHPet - A web tool to build a virtual machine for PHP development
• Protobox - Another web tool to build a virtual machine for PHP development
• Phansible - A web tool that uses Ansible to build a PHP development virtual machine

Virtual Machines Virtual Machine

Related PHP virtual machine

• HipHop PHP - PHP virtual machine, runtime and JIT by Facebook
• HippyVM – Another PHP virtual machine
• Hack - A HHVM programming language for seamless operation with PHP

IDE Integrated Development Environment

Integrated development environment supporting PHP

• Netbeans - an IDE that supports PHP and HTML5
• Eclipse for PHP Developers - A PHP IDE based on the Eclipse platform
• PhpStorm - A commercial PHP IDE

Web Applications

Web-based apps and tools

• 3V4L an online PHP shell
• DBV - a database version control application
• PHP Queue - An application to manage backend queues
• Composer as a Service - A tool to download the Composer package as a zip file
• MailCatcher - A web tool to capture and view emails

Resources

Various resources to improve your PHP development skills and knowledge, such as books, websites, articles

PHP website

Useful websites related to PHP

• PHP The Right Way - A quick guide to PHP best practices
• PHP Best Practices - A guide to PHP best practices
• PHP Weekly - A PHP news weekly
• PHP Security - A PHP Security Guide
• PHP FIG - PHP Framework Interaction Group
• PHP UG - A website that helps users locate the nearest PHP User Group (UG)
• Seven PHP - A website for interviews with members of the PHP community
• Nomad PHP - An online PHP learning resource
• PHP Mentoring - Peer-to-peer PHP mentoring organization

Other Websites

Useful websites related to web development

• The Open Web Application Security Project (OWASP) - an open software security community
• WebSec IO - A web security community resource
• Web Advent - A web developer calendar
• Semantic Versioning - A website that parses semantic versions
• Atlassian Git Tutorials - a Git tutorial series
• Hg Init - a Mercurial tutorial series
• Servers for Hackers - A newsletter about server management

PHP Books

Very good books related to PHP

• Scaling PHP Applications - An e-book by Steve Corona on scaling PHP applications
• The Grumpy Programmer’s Guide to Building Testable PHP Applications - A book by Chris Hartjes on building testable PHP applications
• Grumpy PHPUnit - A book by Chris Hartjes on unit testing with PHPUnit
• Mastering Object-Orientated PHP - A book about PHP object-oriented by Brandon Savage
• Signaling PHP - A book by Cal Evans on capturing PCNTL signals in CLI scripts
• Securing PHP: Core Concepts - A book by Chris Cornutt on common PHP security terms and practices
• Modernising Legacy Applications in PHP - A book by Paul M. Jones about modernizing legacy PHP applications

Other books

Books related to general computing and web development

• The Linux Command Line -A book about the Linux command line by William Shotts
• Understanding Computation - a book about computing theory by Tom Stuart
• The Tangled Web — Securing Web Applications - A book about web application security by Michal Zalewski
• Elasticsearch: The Definitive Guide - A guide to working with Elasticsearch by Clinton Cormley and Zachary Tong
• Eloquent JavaScript - A book about JavaScript programming by Marijin Haverbeke
• Vagrant Cookbook - A book about creating a Vagrant environment by Erika Heidi
• Pro Git - A book about Git by Scott Chacon and Ben Straub

PHP Video

Very good video related to PHP

• Taking PHP Seriously - From Facebook Keith Adams talks about the advantages of PHP
• PHP Town Hall - A casual PHP podcast with Ben Edmunds and Phil Sturgeon
• Programming with Anthony Anthony Ferrara’s video series

PHP Reading

PHP related reading materials

• Create Your Own PHP Framework - A series of articles by Fabien Potencier on how to create your own PHP framework
• Seven Ways to Screw Up BCrypt - An article about correcting BCrypt implementation
• Preventing CSRF Attacks - An article on preventing CSRF attacks
• Don’t Worry About BREACH - An article about BREACH attacks and CSRF tokens
• On PHP 5.3, Lamda Functions and Closures - an article about lambda functions and closures
• Use Env - An article about using unix environment help
• Composer Primer - Composer Elementary
• Composer Versioning - An article about Composer version
• Composer Stability Flags - An article about Composer stability flags
• Innocent Villagefolk or a Pillagin’ Pirate? – An article about PHP getting ideas from other languages
• Predicting Random Numbers in PHP - an article about generating random numbers
• A 20 Point List for Preventing XSS in PHP - An article about preventing XSS
• PHP Sucks! But I Like It! - An article about the pros and cons of PHP
• PHP Is Much Better Than You Think - An article about the PHP language and ecosystem

PHP Internals Reading PHP kernel reading

Read information related to PHP kernel or performance

• PHP RFCs - PHP RFCs homepage (request annotations)
• PHP Internals Book - An online book about the PHP kernel written by three core developers
• Print vs Echo, Which One is Faster? - An article about printing and echo performance
• The PHP Ternary Operator. Fast or Not? -An article about the performance of ternary operations
• Disproving the Single Quotes Myth - An article about the performance of single and double quoted strings
• You’re Being Lied To - An article about kernel ZVALs
• How Long is a Piece of String -An article about the principle of strings
• Understanding OpCodes - An article about pseudocode
• How Foreach Works -StackOverflow Details about foreach answer
• When Does Foreach Copy? -An article about the principle of foreach
• How Big Are PHP Arrays (And Values) Really? - An article about the principle of arrays
• Why Objects (Usually) Use Less Memory Than Arrays - An article about the principles of objects and arrays
• PHP Evaluation Order - An article about PHP evaluation order
• PHP source code for developers: 1 2 3 4 - A series about PHP source code
• Garbage Collection: 1 2 3 Series on PHP Garbage Collection Principles