How to Install Composer on CentOS 8

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Composer is basically a dependency manager for the programming language, PHP. It functions as some sort of project manager that helps the programmer manage dependencies that will be used on a project to project basis.

Installing PHP

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 dnf install @php

Output:

[root@vps ~]# dnf install @php
 Last metadata expiration check: 0:14:17 ago on Fri 25 Dec 2020 03:00:28 AM EST.
 Dependencies resolved
 ================================================================================

Package       Arch    Version                                 Repository  Size
 ================================================================================

 Installing group/module packages:
  php-mbstring  x86_64  7.2.24-1.module_el8.2.0+313+b04d0a66    AppStream  580 k
  php-xml       x86_64  7.2.24-1.module_el8.2.0+313+b04d0a66    AppStream  188 k
 Installing dependencies:
  libxslt       x86_64  1.1.32-5.el8                            BaseOS     250 k
 Installing module profiles:
  php/common

Transaction Summary
 ================================================================================

 Install  3 Packages

 Total download size: 1.0 M
 Installed size: 2.8 M
 Is this ok [y/N]: y

Download Composer installer

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 dnf -y install wget

Output:

[root@vps ~]# dnf -y install wget
 Last metadata expiration check: 0:14:45 ago on Fri 25 Dec 2020 03:00:28 AM EST.
 Dependencies resolved
 ================================================================================

Package       Architecture    Version                 Repository          Size
 ================================================================================

 Installing:
  wget          x86_64          1.19.5-10.el8           AppStream          734 k

Transaction Summary
 ================================================================================

 Install  1 Package

 Total download size: 734 k
 Installed size: 2.8 M

To install Composer locally by running following command

 wget <https://getcomposer.org/installer> -O composer-installer.php

Output:

 [root@vps ~]# wget <https://getcomposer.org/installer> -O composer-installer.php
 --2020-12-25 03:15:18--  <https://getcomposer.org/installer>
 Resolving getcomposer.org (getcomposer.org)... 142.44.245.229, 2607:5300:201:210                                                                                        0::4:d105
 Connecting to getcomposer.org (getcomposer.org)|142.44.245.229|:443... connected                                                                                        .
 HTTP request sent, awaiting response... 200 OK
 Length: 58460 (57K) [application/octet-stream]
 Saving to: ‘composer-installer.php’

 composer-installer. 100%[===================>]  57.09K  --.-KB/s    in 0.1s

 2020-12-25 03:15:19 (414 KB/s) - ‘composer-installer.php’ saved [58460/58460]

Installing PHP Composer

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

Output:

 [root@vps ~]# php composer-installer.php --filename=composer --install-dir=                                                                                        /usr/local/bin
 All settings correct for using Composer
 Downloading...

 Composer (version 2.0.8) successfully installed to: /usr/local/bin/composer
 Use it: php /usr/local/bin/composer

Verify the PHP Composer version once installation is done

 composer --version

Output:

 [root@vps ~]# composer --version
 Composer version 2.0.8 2020-12-03 17:20:38

Testing Composer

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To test your installation, run the following command.

 composer

Output:

 [root@vps ~]# composer --version
 Composer version 2.0.8 2020-12-03 17:20:38
 [root@vps ~]# composer
  ______
 / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__\/ __\/__ \/ ___/ _ \/ ___/
 / /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
 \____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
        /_/
 Composer version 2.0.8 2020-12-03 17:20:38

 Usage:
   command [options] [arguments]

 Options:
   -h, --help                     Display this help message
   -q, --quiet                    Do not output any message