How to Install Composer on Windows, Linux, and macOS

If you're working with PHP, installing Composer is one of the most important steps. Composer is a dependency manager that helps you install, update, and manage PHP packages easily.

Frameworks like Laravel depend heavily on Composer, so setting it up correctly is essential before creating your first project.

• Before installing Composer, make sure PHP is installed on your system.

Install Composer on Windows

Installing Composer on Windows is the easiest method because it provides a graphical installer.

Step 1: Download Composer

Go to the official Composer website and download the Windows installer.

Step 2: Run the Installer

• Open the downloaded .exe file
• When prompted, select your PHP path:

C:\php\php.exe

Step 3: Complete Installation

Follow the setup wizard and finish installation.

Step 4: Verify Installation

Open Command Prompt and run:

composer -V

Expected Output

Composer version 2.x.x

Install Composer on Linux (Ubuntu/Debian)

Step 1: Download Installer

Run:

curl -sS https://getcomposer.org/installer | php

Step 2: Move to Global Directory

sudo mv composer.phar /usr/local/bin/composer

Step 3: Give Execute Permission

sudo chmod +x /usr/local/bin/composer

Step 4: Verify Installation

composer -V

Install Composer on macOS

Method 1: Using Homebrew (Recommended)

Step 1: Install Composer

brew install composer

Step 2: Verify

composer -V

Method 2: Manual Installation

curl -sS https://getcomposer.org/installer | php
sudo mv composer.phar /usr/local/bin/composer

Basic Composer Commands (Quick Start)

Once installed, here are some commonly used commands:

Check version

composer -V

Create a Laravel project

composer create-project laravel/laravel project-name

Install dependencies

composer install

Update packages

composer update

Common Issues and Fixes

Composer not recognized

• Restart terminal
• Check if Composer is added to PATH

PHP version issues

• Make sure PHP is installed and working:

php -v

Permission errors (Linux/macOS)

sudo chmod +x /usr/local/bin/composer