In today’s guide, we’ll discuss how you can install PHP Composer on CentOS 8 Linux machine. Composer is a PHP application package manager created to provide a standard format for managing dependencies of PHP software and required libraries. This tool is helpful when a developer want to manage and integrate external packages into their PHP projects.

Installing Composer on CentOS 8

Now that we’ve covered the basics, we can start the actual installation of Composer in our CentOS 8 Linux box.

Step 1: Install PHP

First ensure PHP is installed in your local system.

$ sudo dnf install @php

Confirm installation of PHP.

$ php -version
PHP 7.2.11 (cli) (built: Oct  9 2018 15:09:36) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies

We have a complete guide on the installation of PHP on CentOS 8.

Step 2: Download Composer installer

Next is to download the Composer installer locally.

sudo dnf -y install wget
wget https://getcomposer.org/installer -O composer-installer.php

Step 2: Install PHP Composer on CentOS 8

Once the installer is downloaded, we can install composer in our machine using the command below.

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

The installation will give you an output similar to below.

All settings correct for using Composer
Downloading...

Composer (version 1.9.1) successfully installed to: /usr/local/bin/composer
Use it: php /usr/local/bin/composer

Verify your installation of Composer on CentOS 8.

$ composer --version
Composer version 1.9.1 2019-11-01 17:20:17

To check the usage page, use:

$ composer
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                    /_/
Composer version 1.9.1 2019-11-01 17:20:17

Usage:
  command [options] [arguments]

Options:
  -h, --help                     Display this help message
  -q, --quiet                    Do not output any message
  -V, --version                  Display this application version
      --ansi                     Force ANSI output
      --no-ansi                  Disable ANSI output
  -n, --no-interaction           Do not ask any interactive question
      --profile                  Display timing and memory usage information
      --no-plugins               Whether to disable plugins.
  -d, --working-dir=WORKING-DIR  If specified, use the given directory as working directory.
      --no-cache                 Prevent use of the cache
  -v|vv|vvv, --verbose           Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug

Available commands:
  about                Shows the short information about Composer.
  archive              Creates an archive of this composer package.
  browse               Opens the package's repository URL or homepage in your browser.
  check-platform-reqs  Check that platform requirements are satisfied.
  clear-cache          Clears composer's internal package cache.
  clearcache           Clears composer's internal package cache.
  config               Sets config options.
  create-project       Creates new project from a package into given directory.
  depends              Shows which packages cause the given package to be installed.
  diagnose             Diagnoses the system to identify common errors.
  dump-autoload        Dumps the autoloader.
  dumpautoload         Dumps the autoloader.
  exec                 Executes a vendored binary/script.
  global               Allows running commands in the global composer dir ($COMPOSER_HOME).
  help                 Displays help for a command
  home                 Opens the package's repository URL or homepage in your browser.
  i                    Installs the project dependencies from the composer.lock file if present, or falls back on the composer.json.
  info                 Shows information about packages.
  init                 Creates a basic composer.json file in current directory.
  install              Installs the project dependencies from the composer.lock file if present, or falls back on the composer.json.
  licenses             Shows information about licenses of dependencies.
  list                 Lists commands
  outdated             Shows a list of installed packages that have updates available, including their latest version.
  prohibits            Shows which packages prevent the given package from being installed.
  remove               Removes a package from the require or require-dev.
  require              Adds required packages to your composer.json and installs them.
  run                  Runs the scripts defined in composer.json.
  run-script           Runs the scripts defined in composer.json.
  search               Searches for packages.
  self-update          Updates composer.phar to the latest version.
  selfupdate           Updates composer.phar to the latest version.
  show                 Shows information about packages.
  status               Shows a list of locally modified packages, for packages installed from source.
  suggests             Shows package suggestions.
  u                    Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  update               Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  upgrade              Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  validate             Validates a composer.json and composer.lock.
  why                  Shows which packages cause the given package to be installed.
  why-not              Shows which packages prevent the given package from being installed.

Conclusion

In this post, we have successfully installed Composer on CentOS 8 Linux machine. Visit the official Composer documentation page to learn more about composer and how you can use it in your projects.

Check other guides:

How To Install phpIPAM on CentOS 8 / RHEL 8 Linux

How To Install PHPUnit on CentOS & Fedora