**Introduction**: This guide provides step-by-step instructions on how to install Composer, a dependency management tool for PHP, on a CentOS 7 system. Composer is widely used in PHP projects to manage libraries and dep…

How to Install Composer on CentOS 7

Last updated: April 2026
Reading time: ~2 min
Audience: Boxis customers and administrators.

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What you'll accomplish

• Complete the configuration or task described in this guide for your Boxis service.

Prerequisites

• Access to the interface, device, or server described below.
• Information or credentials you received from Boxis (contract, welcome e-mail, or client area).

Note Boxis: Offers and screens may differ slightly depending on your product. When in doubt, open a support ticket with your service reference.

Introduction: This guide provides step-by-step instructions on how to install Composer, a dependency management tool for PHP, on a CentOS 7 system. Composer is widely used in PHP projects to manage libraries and dependencies.

Requirements:

• A CentOS 7 server
• Access to a terminal or command line
• Sudo privileges or access to the root user

Step-by-Step Guide:

1. Update System Packages:

   • Open your terminal.
   • Run the command sudo yum update to ensure all your system packages are up-to-date.

2. Install PHP:

   • Composer requires PHP to be installed on your system. Install PHP by running:

     sudo yum install php php-cli php-zip wget unzip

   • Once installed, verify the installation by checking the PHP version:

     php -v

3. Download Composer:

   • Use the following command to download the Composer installer:

     php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"

4. Verify the Installer:

   • To ensure the installer is safe to use, verify it with the following command:

     php -r "if (hash_file('SHA384', 'composer-setup.php') === '') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

     Replace `` with the latest hash value found on the Composer Public Keys / Signatures page.

5. Install Composer:

   • Run the installer with:

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

   • This installs Composer globally.

6. Verify Composer Installation:

   • Once the installation is complete, verify it by checking the Composer version:

     composer --version

7. Using Composer:

   • With Composer installed, you can now use it to manage dependencies in your PHP projects. For example, to start a new project, you can use:

     composer init

   • Follow the prompts to create a composer.json file for your project.

Conclusion: Composer is now installed on your CentOS 7 system. You can use Composer to manage PHP dependencies, require libraries, and manage autoloaders in your PHP projects.

Additional Resources:

• Composer's Official Documentation: https://getcomposer.org/doc/
• CentOS Official Website: https://www.centos.org/

Expected result

• The product behaves as described in each step (connectivity, message, or UI state).

If something goes wrong

• Repeat the step and check for typos (hostnames, passwords, ports).
• Note the exact error message or screenshot.
• Open a ticket in the Boxis client area with the service name, time of the test, and any trace (e.g. traceroute) if it is a network issue.

See also

• Other articles in the same category in the Boxis knowledge base.
• /knowledgebase/ — main knowledge base index.