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Jonathan Reinink Software developer from Canada. Been writing PHP for over 16 years. Marketing agency for over a decade. Started contract development this year. I <3 open source. 

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What is a package? 

Packages are important because they provide code we don’t have to write. 

Today there are 92,000 PHP package available on Packagist. 

Packages are a BIG part of what makes a language successful. 

Please consider contributing a PHP packages to the community, or even simply helping on an existing one. 

Share your unique way of solving a problem. 

I promise it will be of benefit to you. 

Contributing to an open source package will push you as a developer. GIT GitHub Issues Pull Requests Rebasing Testing TDD Semantic Versioning Code Coverage Composer Packagist Coding Standards PHP-FIG PSR DocBlocks Travis Scrutinizer CI Changelogs Licensing Code Sniffer Jekyll Shields.io Code Quality Milestones Releases Dependency Injection Coupling Cohesion 

Creating packages can be a little intimidating. 

Introducing The PHP Package Checklist. phppackagechecklist.com 

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Designed for open sources packages, but applicable to any PHP package. 

Pick a name wisely 

Ensure that there is a unique identifier in your package name. 

“Calling a spec for JSON API’s “JSONAPI” is just the worst. Searchability: zero.” — Frank de Jonge 

Twig Guzzle Monolog Flysystem Swift Mailer Eloquent Blade Aura 

Ensure the name isn't already used by another project. 

Maintain consistency between this name and your PHP namespace. 

// Good: namespace Glide; namespace League\Glide; // Bad: namespace Images; namespace ImageManipulations; namespace PHPGlide; namespace YoloImages; 

Avoid using last names or personal handles in your PHP namespaces. 

Host source openly 

Hosting your code openly encourages: • Contributions • Downloads • Code Reviews • Bug Reports 

Recommendation: GitHub 

Even if you prefer Bitbucket, SourceForge, or Google Code, your end users most likely won’t. 

GitHub shines as social coding platform. 

GitHub has an insane number of integration options. 

GitHub is free to use for public projects. 

Alternatives: Bitbucket 

Autoloader friendly 

Use a PSR-4 compatible autoloader namespace. 

Place code in the /src folder. 

Distribute via Composer 

$ composer require league/glide 

{ "name": "league/glide", "require": { "intervention/image": "^2.1", "league/flysystem": "^1.0", "php": "^5.4 | ^7.0", "psr/http-message": "^1.0" }, "autoload": { "psr-4": { "League\\Glide\\": "src/" } } } 

List on Packagist, the main Composer repository. 

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Official Website https://getcomposer.org/ Laracasts https://laracasts.com/series/laravel-5-fundamentals/episodes/1 Sitepoint http://www.sitepoint.com/php-dependency-management-with-composer/ Code Mentor https://www.codementor.io/php/tutorial/composer-install-php-dependency-manager 

Framework agnostic 

Don't limit your project to just one framework. 

Offer framework specific support for your package using service providers. 

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Follow a coding style 

Highly recommended that you adhere to the PSR-2 coding style guide. 

A familiar coding style makes open source code easier to contribute to. 

Do this quickly with an automated code fixer like PHP Coding Standards Fixer. 

You can also use services like Nitpick or StyleCI to help you with this. 

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Write unit tests 

Aim to cover the majority of your code. 

PHPUnit is the de facto testing framework in PHP. 

Alternatives: phpspec, Behat, atoum, Codeception. 

DocBlock your code 

/** * Set source file system. * @param Filesystem $source Source file system. */ public function setSource(Filesystem $source) { $this->source = $source; } 

DocBlock serve as inline documentation. 

They can also improve code completion in IDEs, like PhpStorm. 

Can be automatically converted into API documentation, see phpDocumentor. 

Use semantic versioning 

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Follow the pattern: MAJOR.MINOR.PATCH BREAKING.NEW-FEATURES.BUG-FIXES 

Semantic versioning allows developers to upgrade code safely, without worrying about breaking changes. 

semver.org 

Remember to tag releases in a timely manner! 

Keep a changelog 

Show notable changes that have been made between releases. 

Consider following the Keep a CHANGELOG format, see keepachangelog.com. 

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{% for release in site.github.releases %} ## [{{ release.name }}]({{ release.html_url }}) - {{ release.published_at | date: "%Y-%m-%d" }} {{ release.body | markdownify }} {% endfor %} 

Use continuous integration 

Use a service to automatically check coding standards and run tests. 

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Write extensive documentation 

“Tests are hard so we practice to get better. Docs are hard… so we don’t write any and complain.” — Steve Klabnik, Senior Technical Writer (maintainer of the official Rust documentation) 

Don’t release an open source package unless your committed to writing good documentation. 

The formula to awesome docs. 

Consider hosting documentation on GitHub Pages. 

Alternatives: Read the Docs. 

Include a license 

See choosealicense.com. Most PHP projects use the MIT License. 

The MIT License Copyright (c) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 

At a minimum, include a LICENSE file with your library. 

Welcome contributions 

Have a CONTRIBUTING file, welcoming contributions to the project. 

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Thanks! Follow me on Twitter at @reinink. Please rate this talk at joind.in/talk/f499d.