Composer is a dependency manager for PHP, enabling you to manage libraries and packages in your PHP projects easily. In this guide, we will walk through the steps to install Composer on Debian 11.

Step 1: Update Your System

Start by ensuring your system is up to date:

sudo apt update && sudo apt upgrade -y

Step 2: Install PHP and Required Extensions

Make sure PHP and the necessary extensions are installed. You can install PHP and its extensions with the following command:

sudo apt install php php-cli php-mbstring unzip -y

Step 3: Download Composer Installer

Download the Composer installer script:

curl -sS https://getcomposer.org/installer -o composer-setup.php

Step 4: Install Composer

Run the installer script with PHP:

php composer-setup.php --install-dir=/usr/local/bin --filename=composer

Step 5: Verify Installation

Check if Composer is installed correctly by running:

composer --version

You should see the version number of Composer if the installation was successful.

Step 6: Using Composer

You can now use Composer to manage your PHP packages. For example, to create a new project with Laravel, you would run:

composer create-project --prefer-dist laravel/laravel my-laravel-app

Conclusion

You have successfully installed PHP Composer on Debian 11. This powerful tool will help you manage your PHP dependencies effortlessly.

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