What is Composer?

Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you.
Composer is a tool in the Package Managers category of a tech stack.
Composer is an open source tool with 20.7K GitHub stars and 5.6K GitHub forks. Here’s a link to Composer's open source repository on GitHub

Who uses Composer?

135 companies reportedly use Composer in their tech stacks, including Walls.io, Zumba, and Infoshare.

241 developers on StackShare have stated that they use Composer.

Composer Integrations

Why developers like Composer?

Here’s a list of reasons why companies and developers use Composer
Composer Reviews

Here are some stack decisions, common use cases and reviews by companies and developers who chose Composer in their tech stack.

Gev Balyan
Gev Balyan
Founder at UCRAFT · | 2 upvotes · 16.7K views

We recently decided to rewrite Ucraft's Laravel from scratch.

The goal is to make everything more Laravel friendly that will speak to frontend JavaScript , built on Ember.js via JSON Patch standard. This will also make out app better extendible and overridable.

The namespeaces are going to be more correct and the app itself will be compatible with Composer packages.

This also improves the connection between MySQL and PHP making the reoccurring MySQL queries cached during the lifecycle.

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Composer is THE tool for dependency management in PHP. This idea is not new and Composer is strongly inspired by node's npm and ruby's bundler.

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Composer Alternatives & Comparisons

What are some alternatives to Composer?
Docker Compose
With Compose, you define a multi-container application in a single file, then spin your application up in a single command which does everything that needs to be done to get it running.
The Docker Platform is the industry-leading container platform for continuous, high-velocity innovation, enabling organizations to seamlessly build and share any application — from legacy to what comes next — and securely run them anywhere
Kubernetes is an open source orchestration system for Docker containers. It handles scheduling onto nodes in a compute cluster and actively manages workloads to ensure that their state matches the users declared intentions.
Docker Swarm
Swarm serves the standard Docker API, so any tool which already communicates with a Docker daemon can use Swarm to transparently scale to multiple hosts: Dokku, Compose, Krane, Deis, DockerUI, Shipyard, Drone, Jenkins... and, of course, the Docker client itself.
Homebrew installs the stuff you need that Apple didn’t. Homebrew installs packages to their own directory and then symlinks their files into /usr/local.
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Composer's Stats

Composer's Followers
206 developers follow Composer to keep up with related blogs and decisions.
Mayukh Ghosh
Mohamed Hadj Kacem
Marcel Cozma
Ivo Sanchez
Sherine Brisillal
Armen Mkrtchyan