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Ubuntu 22.04 Install Composer: successful installation


You can install the Composer package manager, which was specially designed for PHP, in just a few steps in Ubuntu 22.04. Installation is done in the terminal using the command line tool curl.

Install Composer on Ubuntu 22.04: Step-by-Step Guide

To install Composer, you must first ensure that PHP is already installed on your system and that you have access to PHP through the terminal. You can verify these two points by entering the following command in the terminal:

If an error message is displayed, you can install the command line tool for PHP 8 with the following command:

sudo apt install php8.1-cli


Terminal after running
If you haven’t installed the PHP command line tool yet, Ubuntu directly suggests the appropriate commands in the terminal.

After verifying that you can use PHP on your system, the installation of PHP Composer can begin.

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Step 1: Update the system

First, you must to update your Linux system by running all existing updates. You may need to confirm the upgrade process by clicking “Y” (Yes). You can use the following terminal commands for this purpose:

sudo apt update
sudo apt upgrade


Updating your system may take a few moments. It entirely depends on the number of updates to be installed.

Step 2: Install required packages

For the Composer installation on Ubuntu to work, you must first install the additional packages including Composer needs for installation. This includes, for example, the curl command-line tool or Git version control.

Packages can also be downloaded directly from the terminal by typing the following commands into your command line:

sudo apt install curl php-mbstring git unzip


Step 3: Install PHP Composer

Now you can start the full-fledged installation of PHP Composer on Ubuntu 22.04. To do this, use the curl tool you just downloaded by entering the following command in your terminal:

curl -sS | sudo php -- --install-dir=/usr/local/bin --filename=composer


Terminal after running PHP Composer install command
Your terminal informs you about the successful installation of Composer on Ubuntu.

Step 4: Verify successful installation

In the last step, you need to manually verify success PHP Composer installation by trying to access the package manager. If that doesn’t work, your $PATH environment variable may not be set correctly. The command below calls the current version of PHP Composer:

If your terminal now shows the following output, it means that the installation of PHP Composer was successful on Ubuntu 22.04:

Terminal after running
You observe a Composer acronym as well as the current version of Composer after starting PHP Composer.

Get started with Composer

The package manager is used in PHP projects to manage independences and update them. To make getting started with PHP Composer easy, we’ve put together the essential PHP Composer commands for your first steps.

Step 1: Create the composer.json file

The main task of PHP Composer is to manage the dependencies of your PHP project. The central location where you specify these dependencies is the composer.json file. It can be created manually. You can also configure the JSON file automatically when you create your first dependency. The Composer command you need to manually create a composer.json file is:

Step 2: Add dependencies to your project

If you now want to add a dependency to your project, you can also use a Composer command to ensure that composer.json is updated accordingly. The following sample code is to add the popular Monolog logging library like a dependency in a PHP project.

composer require monolog/monolog


Step 3: Update dependencies

From time to time, it is necessary to update the dependencies of a PHP project. There is also a PHP Composer command to do this. She update all dependencies added to your project all at once:

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