PHP

Dialects and runtimes

• RoadRunner
• Hack
• gophp

Vendors

Application frameworks

• CodeIgniter
• CakePHP
• Yii
• Zend Framework (deprecated)
• Laminas (formerly Zend Framework)
• Flow
• PhpBoot
• API Platform

Laravel

• Laravel

Symfony

• Symfony UX
• Symfony

Concurrency frameworks

• ReactPHP
• AMPHP
• pthreads (extension)
• Open Swoole

Libraries

Validation and filtering

• Filterus
• Sirius Validation

Dates and times

• Carbon

CLI execution

• Clinner

Utility libraries (General Purpose)

• Spatie

Tools

Code sandboxes/playgrounds/REPLs

• psysh
• 3v4l.org
• OnlinePHP.io

Code editors and IDEs

• PhpStorm
• Zend Studio

Debugging and profiling

• PHP Debug Bar

Testing tools

Testing frameworks

• Atoum
• Behat
• Codeception
• Kahlan
• Peridot
• prophecy
• phpspec
• PHPUnit
• Cigar
• Infection
• Pest

Contract testing

• Spectator

Debugging and profiling

• insphptor
• xhprof

Documentation generation

• phpDocumentor
• hphpdoc

Package registries

• Packagist

Package management

• Composer
• Pyrus
• PEAR

Linters and static analysis

• PHPstan
• phan
• psalm

Php version managers

• PVM for Windows
• php-version
• phpenv
• phpbrew

Php runtime builders/compilers

• PHP docs: building from source
• php-build
• NativePHP

Standards

• Object Calisthenics
• PHP-FIG
• Pear Coding Standards
• phpbestpractices.org

Reference

• PHP Watch
• PHP

Books

• PHP Programming

Blogs and posts

• PHP Internals Book
• Hacking with PHP
• PHP: The Right Way
• PHP: The Wrong Way (archive)
• PHP Sadness (archive)
• PHP: A Fractal of Bad Design