Creating a PHP class library

07 Jan 2015

Today I created a PHP class library and shared it on Packagist. In this post I hope to share my experience.

The class library I created for this project is available on Github and Packagist:

The following need to be installed on your development environment.

  • PHP
  • Git
  • Composer

I currently use PHPStorm (version 8 as of this writing) as my PHP IDE and I also have PHP_CodeSniffer installed and configured to check my PHP source code for compliance with PSR coding standards. A good intro can be found here

Create a PHP Project in PHPStorm

I created a new PHP Project with the following files and folder structure:


Initialize Git

From the git bash run:

git init    

Create Github Repository

Create a Github repository with the name of your class library project, ImageResizer in my case. Github will ask you to initialize your git repository with a and a license.

Create Initial Commit

On your local machine add and commit your initial files. Run:

git add --all
git commit -am 'Initial commit'

The command git add --all adds or stages all unstaged files in your working directory to git.

The command git commit -am 'Initial commit' commits your changes. The parameter -a adds or stages modified files. The parameter -m followed by ‘Your commit message’ allows you to specify the commit message.

Add Git Remote

Add your Github repository as a remote for your local git repo. Run:

git remote add origin

Replace with the url of your own repository.

Verify that the remote was added by running:

git config --get remote.origin.url

This should output your the url to your Github repo.

Tag your stable commit to set a version which Packagist will read and assign to your package.

Create an Annotated Tag

git tag // Lists existing tags    
git tag -a v1.0.0 -m 'First version' // Creates an annotated tag

Push Tags to Remote

git push origin v1.0.0 // pushes specific tag
git push origin --tags // pushes all tags 

Create Composer Json

    "name": "stormwild/image-resizer",
    "description": "PHP class to resize images using GD",
    "keywords": [
    "type": "library",
    "license": "MIT",
    "homepage": "",
    "authors": [
            "name": "Alexander R. Torrijos",
            "homepage": ""
    "require": {
        "php": ">=5.3.0",
        "ext-gd": "*"
    "autoload": {
        "classmap": ["src"]

Create An Account on Packagist


Submit Package

Submit the package to packagist by providing the github/bitbucket url.

Setup Service Hooks on Github

You will need a token provided by Packagist

For more information:

Service Hooks