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 @phpConfirm 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 TechnologiesWe 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.phpStep 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/composerVerify your installation of Composer on CentOS 8.
$ composer --version
Composer version 1.9.1 2019-11-01 17:20:17To 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.
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