In today’s guide, we’ll discuss how you can install PHP Composer on CentOS 8 / RHEL 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.

Install PHP Composer on CentOS 8 / RHEL 8

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

Step 1: Install PHP

List available PHP AppStream modules.

$ dnf module list php
Last metadata expiration check: 0:01:27 ago on Tue 10 Oct 2023 03:32:04 AM UTC.
Rocky Linux 8 - AppStream
Name                                  Stream                                     Profiles                                                       Summary
php                                   7.2 [d][e]                                 common [d] [i], devel, minimal                                 PHP scripting language
php                                   7.3                                        common [d], devel, minimal                                     PHP scripting language
php                                   7.4                                        common [d], devel, minimal                                     PHP scripting language
php                                   8.0                                        common [d], devel, minimal                                     PHP scripting language

Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled

Reset default PHP module.

sudo dnf module reset php -y

Ensure PHP is installed in your local system. We’ll install 8.0

sudo dnf install @php:8.0 -y

Confirm installation of PHP.

$ php -version
PHP 8.0.27 (cli) (built: Jan  3 2023 16:17:26) ( NTS gcc x86_64 )
Copyright (c) The PHP Group
Zend Engine v4.0.27, Copyright (c) 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 3: Install PHP Composer

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 2.6.5) successfully installed to: /usr/local/bin/composer
Use it: php /usr/local/bin/composer

Verify your installation of Composer on CentOS 8 / RHEL 8.

$ composer --version
Composer version 2.6.5 2023-10-06 10:11:52

To check the usage page, use:

$ composer
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                    /_/
Composer version 2.6.5 2023-10-06 10:11:52

Usage:
  command [options] [arguments]

Options:
  -h, --help                     Display help for the given command. When no command is given display help for the list command
  -q, --quiet                    Do not output any message
  -V, --version                  Display this application version
      --ansi|--no-ansi           Force (or disable --no-ansi) ANSI output
  -n, --no-interaction           Do not ask any interactive question
      --profile                  Display timing and memory usage information
      --no-plugins               Whether to disable plugins.
      --no-scripts               Skips the execution of all scripts defined in composer.json file.
  -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 a short information about Composer
  archive              Creates an archive of this composer package
  audit                Checks for security vulnerability advisories for installed packages
  browse               [home] Opens the package's repository URL or homepage in your browser
  bump                 Increases the lower limit of your composer.json requirements to the currently installed versions
  check-platform-reqs  Check that platform requirements are satisfied
  clear-cache          [clearcache|cc] Clears composer's internal package cache
  completion           Dump the shell completion script
  config               Sets config options
  create-project       Creates new project from a package into given directory
  depends              [why] Shows which packages cause the given package to be installed
  diagnose             Diagnoses the system to identify common errors
  dump-autoload        [dumpautoload] Dumps the autoloader
  exec                 Executes a vendored binary/script
  fund                 Discover how to help fund the maintenance of your dependencies
  global               Allows running commands in the global composer dir ($COMPOSER_HOME)
  help                 Display help for a command
  init                 Creates a basic composer.json file in current directory
  install              [i] 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                 List commands
  outdated             Shows a list of installed packages that have updates available, including their latest version
  prohibits            [why-not] Shows which packages prevent the given package from being installed
  reinstall            Uninstalls and reinstalls the given package names
  remove               [rm] Removes a package from the require or require-dev
  require              [r] Adds required packages to your composer.json and installs them
  run-script           [run] Runs the scripts defined in composer.json
  search               Searches for packages
  self-update          [selfupdate] Updates composer.phar to the latest version
  show                 [info] Shows information about packages
  status               Shows a list of locally modified packages
  suggests             Shows package suggestions
  update               [u|upgrade] Updates your dependencies to the latest version according to composer.json, and updates the composer.lock file
  validate             Validates a composer.json and composer.lock

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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:

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